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Tires/Tubes

$28.99
The Col De La Vie has gained an enviable reputation as the tire for your touring adventures. Blending the perfect combination of durability, weight and feel, the Col De La Vie will help take you on those unforgettable touring adventures in safety and confidence. - Smooth-rolling tire is designed for touring and randoneering - Recessed tread provides more traction than slick tires
$25.99
FireSport is our entry-level price-point Fire. If you're looking for tread benefits of the main line Fire but at a lower price, the FireSport is for you.
$14.29 - $73.69
Orange Seal’s rim tape comes in 18mm, 24mm, and 45mm widths fitting most bike rims. The elasticity of the tape allows greater flexibility in fitting different types of rims and form factors.
$31.99 - $38.99
- The same tubeless valves, now with a Tire Insert air flow system - 6 slots machined into the base of the valve stem allow air to flow freely around tubeless tire inserts - Upgraded to aircraft grade 7075 aluminum valve stem and cap - 4mm machined Allen Key slot for easy installation/removal - Valve core removal tool integrated into valve cap - Includes multiple rubber bases to optimize fit with multiple rim types
$42.00 - $77.00
The Maxxis Ardent is a light duty trail tire that rolls fast in dry conditions. For similar rolling speed with improved braking and cornering performance, check out the Rekon.
$42.00 - $84.99
The Maxxis Ardent is a light duty trail tire that rolls fast in dry conditions. For similar rolling speed with improved braking and cornering performance, check out the Rekon.
$44.99 - $99.99
The Maxxis Ardent Race shares many features with the Ikon – small, ramped center tread – but offers improved cornering performance with more substantial side knobs.
$99.99 - $109.99
Greg Minnaar’s signature tire – the Maxxis Assegai – provides tenacious, predictable grip across the entire profile no matter the lean angle. The Assegai can be used front and rear for a surefooted feel or as a front paired with a faster rolling rear tire. Rubber: Dual compound (best for dry, hard conditions) 3C MaxxTerra (best for mixed conditions) 3C MaxxGrip (best for soft, wet conditions) Casings: 60 TPI + EXO (general trail use) EXO+ (heavy duty trail use) DoubleDown (enduro use) Downhill (DH race, bike park, gravity) Wide Trail (WT) sizes are optimized for 30-35mm inner width rims Tubeless Ready specs are denoted with a “TR” in the tables below Category: Trail, Enduro, Downhill Recommended use: All trail, enduro, and downhill conditions Recommended installation: Front
$93.00 - $101.00
Greg Minnaar’s signature tire – the Maxxis Assegai – provides tenacious, predictable grip across the entire profile no matter the lean angle. The Assegai can be used front and rear for a surefooted feel or as a front paired with a faster rolling rear tire. Rubber: Dual compound (best for dry, hard conditions) 3C MaxxTerra (best for mixed conditions) 3C MaxxGrip (best for soft, wet conditions) Casings: 60 TPI + EXO (general trail use) EXO+ (heavy duty trail use) DoubleDown (enduro use) Downhill (DH race, bike park, gravity) Wide Trail (WT) sizes are optimized for 30-35mm inner width rims Tubeless Ready specs are denoted with a “TR” in the tables below Category: Trail, Enduro, Downhill Recommended use: All trail, enduro, and downhill conditions Recommended installation: Front
$82.00 - $104.99
Troy Brosnan's go-fast signature tire. - Ideal for dry, fast trails - Tubeless compatible - Wide Trail casing optimized for 30-35mm rims Designed in conjunction with Aussie DH racer, Troy Brosnan, the Dissector seeks to minimize drag while retaining cornering control. This versatile tire can be used as a front, a pair, or as a rear, depending on trail conditions.
$33.00 - $119.99
The Minion DHF has become the benchmark for riders wanting maximum control in loose and muddy conditions. - Directional ramped center knobs provide low rolling resistance - Minion signature channel cut side knobs provide excellent cornering traction - Intended use: loose, loose over hard, medium, wet
$41.00 - $119.99
- The new incarnation of the Minion DHR. Ready to shred any line - Excellent cornering traction - Pair it with a Minion DHF up front for the ultimate aggressive trail riding tire combo! - Plus sizes available - Wide Trail casing optimized for 30—35mm rims
$44.99
- Makes the perfect economical trekking tire - The Excel has a reflective stripe on the sidewall, keeping you visible at night for city riding - If getting a reliable, high-performance trekking tire at an economical price is what you're after, the Overdrive Excel is the tire for you.
$44.00 - $89.99
The Maxxis Rekon Race is a semi-slick XC race tire that features the lowest profile tread in our XC line. It is a great choice for dry XC trails and short track racing.
$53.00 - $56.00
From pro-level race bikes to sport, fitness and adventure bikes, Giant delivers the benefits of tubeless tire technology to riders of all types. Features - Fast-rolling gravel tread design with enhanced traction on loose surfaces - Tubeless Ready design allows for reduced air pressure to enhance comfort and reduced risk of punctures - Supple, 60 TPI casing for better performance and control - Tread compound optimized for 30% pavement, 70% gravel or dirt road riding - Wire Bead
$14.00
Giant's inner tubes are made from high-quality, standard weight rubber so you can keep on rolling. - Valve length: 48mm
$9.99
Giant's inner tubes are made from high-quality, standard weight rubber so you can keep on rolling.
$41.95 - $54.99
Fast, safe and comfortable — guaranteed! The Contact is the jack-of-all-trades among city and trekking tires. Its tread design is based upon the principles of bionics. A uniform center tread/belt assembly ensures a smooth and speedy ride on the road. Flexible shoulder lugs and fine sipes guarantee grip in curves and on loose surfaces. The overall tire construction rounds off the overall high quality. The ultra fine carcass fabric reduces the rolling resistance while providing a noticeably more comfortable ride. Reflective sidewall for extra visibility. Reflective Sidewall: REFLEX is 3M reflective is commonly known to be one of the most highly reflective material options. A thin, silver light-reflecting strip on both sidewalls that adds visibility and safety to Continental's city / commuter / urban tires.
$86.99
Puncture protection and mileage are the strengths of Hardshell-ProTection. A wider PolyX Breaker, the specialist against punctures under the tread center and shoulders, provides for great reliability. The three-ply—each layer with 60 TPI—carcass covers the entire tire and makes it a real bastion against urban detritus. The outer sidewalls of the tire are reinforced with DuraSkin fabric, providing even more reliability due to the casing being so well protected. Hardshell tires are the puncture-resistant flagship amongst racing tires—produced exclusively in Germany. - Ideal when it comes to extremely long service life, for the next tour or the commute. - Made for rough surfaces and rugged tarmac.
$62.95 - $69.99
Continental's Gatorskin combines 3 flat-protection technologies into one fast-riding, high-mileage racing and training tire. It features a super-fine 180 thread-per-inch casing, a bead-to-bead layer of DuraSkin, and is finished with a Kevlar-reinforced top layer. The result is a light tire that rolls and corners with the best of them while providing flat protection second to none. - Weight: 290/310/360/365/390 grams (23c/25c/28c/32c/27 x 1 1/4) - PolyX puncture protection - DuraSkin sidewall protection
$62.95 - $74.99
With our PolyX Breaker, we bring our car expertise to the bicycle tire segment: Polyester has been used successfully for years in car tires and been tried and tested many times. The extremely resistant polyester fiber is woven tightly crosswise. In this way, a very high fabric density is reached, which not only makes the Breaker more resistant to foreign objects but is also especially resistant to punctures. The rolling resistance is also not negatively affected by the PolyX Breaker. - The right tire when it comes to tough conditions. - The right choice for a strong performance in the urban field and on tour.
$69.99
Continental's Gatorskin Folding combines 3 flat-protection technologies into one fast-riding, high-mileage racing and training tire. It features a super-fine 180 thread-per-inch casing, a bead-to-bead layer of DuraSkin, and is finished with a Kevlar-reinforced top layer. The result is a tire with a lightweight folding bead that rolls and corners with the best of them while providing flat protection second to none. - DuraSkin sidewall protection - PolyX puncture protection - Weight: 220/240/320/325 grams (23c/25c/28c/32c)
$82.95 - $97.99
The Grand Prix 5000 is the best all-rounder in the field, brought to a whole new performance level. Ride faster, more comfortably, and with increased puncture protection. Its Active Comfort Technology absorbs vibrations and smooths your ride. Lazer Grip technology, designed to make you one with the road, features a lasered micro profile structure that expands over the tire’s shoulder and provides outstanding cornering. The Vectran Breaker is lighter, more flexible and protects more effectively against cuts than comparable nylon. With incredible tear resistance at a very low weight, it possesses exactly the right properties to be a premium puncture protection insert, while not adversely affecting rolling resistance. The Grand Prix 5000—made to make you better. With Continental's unique and legendary BlackChili tread compound, produced only in Germany, they have revolutionized the sport of cycling. This compound answers the eternal question of the best balance of grip and rolling resistance for cycling. Regular test wins confirm the measurable and noticeable advantages for cyclists, established in both the lab and on the road. The latest polymers, as well as specially developed carbon black particles and filler materials, guarantee ultimate performance.
$35.95 - $46.99
A robust tire with a modern look for city riding - Solid tires for town and city bikes also suitable for tarmac and gravel paths - Good traction from its large contact patch with the terrain - High reliability, best quality: gets you to where you want to go on time!
$24.95 - $42.99
Completely renewed, sporting a dynamic tread pattern design. Matches with a race bike, as well as a classic city road bike. Available in a wide range of dimensions and colors. PureGrip Compound Based on activated silica compounds, this technology was originally intended as an performance level compound, but after intensive development at our Korbach Research and Development Department Facility, an advanced new compound with outstanding grip and cross-country properties was developed. This new rubber mix, given the self explanatory name "PureGrip", is ranked just behind our BlackChili Compound and is being used in our performance products both in the road and mountain bike sectors. Whilst providing great grip, it is also long lasting and highly durable – both characteristics of Continental tires, which are exclusively manufactured in the factory in Hefei (Asia). Suitable for E-Bikes For our E-Bike tyre we fall back on over 100 years' experience with moped and motorcycle tires. All of our city/trekking tires are rated to a standard speed of at least 25 km/h. Those tires marked e50 are also certified for S-Pedelecs. With their high quality structure, puncture protection is high and the rolling resistance is low offering protection from premature wear brought about by the additional driving force.
$9.00 - $11.00
Always needed. Quality tested and a great value, the 0.9mm thick butyl rubber innertube strikes the perfect balance between weight and durability. Where it thrives: In the garage, on the bike What it's built for: Durability, Fixing Highlights: - Presta valve with a fixed/non-removable valve core 0.9mm wall thickness - Each tube passes a 24 hour air hold test prior to packaging
$20.64 - $22.99
- 2-ply rubber shield fits between tire and tube to prevent flats - Pair
$29.99 - $39.99
Before the Pika, gaining traction on gravel roads was a true feat. Now, it’s child’s play. Ramped center knobs roll fast on loose gravel, and U-shaped shoulder knobs dig in on the turns. The Pika is equipped with dual compound tread, EPS protection, and wire bead.
$29.99
The Connection Trail mountain bike tires deliver ride-refining confidence for journeys along a well-worn trail, and offer plenty of comfort when the path leads you to the road less traveled. Key features - Easy-rolling path and pavement tire - Excels on pavement and trail - Wire bead - Hard Case puncture protection
$19.99
This mixed-use tire delivers off-road prowess with on-road manners for smaller-wheeled riders. Aggressive knobbies grip the loose stuff while a connected center ridge rolls smoothly. Product details - Easy-rolling path and pavement tire - Available in popular kids bike sizes - Great value
$20.99
An inner tube for fat bikes, built with the Hodag and Jackalope in mind. Fat tires need fat tubes. The Fat Bike Tube is just that, a tube built specifically for fat bikes. Tailored sizes perfectly suit the line of Bontrager fat tire models. Product details - 0.9mm wall thickness - Equipped with removable valve cores - 100% inspected for guaranteed quality
$15.99
The Fat Bike Tube is just that, a tube built specifically for fat bikes. Tailored sizes perfectly suit the line of Bontrager fat tire models. Product details - 0.9mm wall thickness - Equipped with removable valve cores - Purchase 50 tubes to receive a full case - 35mm Schrader valve
$55.99
Don't let a little wet and mud stop downhill performance. The G-Mud cuts provides the wet traction needed to tame sloppy downhill tracks. The G-Mud was developed with features such as dual-Ply multi layer casing and customizable, trimmable knobs for world cup racing in muddy wet conditions. Key features - Excels in DH racing in muddy, wet conditions - Dual-Ply multi-layer casing adds stability in larger-volume, heavy-duty tires - Trimmable knobs for custom performance - Developed for use at World Cup racing level - 60 TPI - Wire bead - Clincher
$69.99
Biting traction to tame even the most aggressive DH tracks. Bontrager's World Cup-winning downhill tire gives you incredible braking control and traction at high speed over aggressive, loose, rocky terrain, wet or dry. The unique G5 tread profile provides maximum bite at any lean angle, with a predictable transition into controlled slides. - A downhill tire that excels in loose, rocky, and wet conditions - Center knob tie-bar increases braking traction - Dual-step shoulder knobs for high lean angle traction - Open tread spacing is self-cleaning - Dual-Ply multi-layer casing adds stability for heavy-duty DH tires with added butyl layer to prevent flats
$69.99
Bontrager's World Cup-winning downhill tire gives you incredible braking control and traction at high speed over aggressive, loose, rocky terrain, wet or dry. The unique G5 tread profile provides maximum bite at any lean angle, with a predictable transition into controlled slides. Key features - Excels in loose, rocky, and wet conditions - Center knob tie-bar increases braking traction - Dual-step shoulder knobs for high lean angle traction - Open tread spacing is self-cleaning - Dual-Ply multi-layer casing adds stability in larger-volume, heavy-duty tires
$29.99
Get back on the road with original equipment tires. Product details - High volume tread design provides incredible traction and cornering capabilities - Wide 2.8" tire excels and looks awesome in nearly all conditions Specifications - 60 TPI - Bead: Wire - Type: Clincher - Max pressure: 60psi - ETRTO: 71-406
$29.99
Get back on the road with original equipment tires. Product details - High volume tread design provides incredible traction and cornering capabilities - Wide 2.8" tire excels and looks awesome in nearly all conditions Specifications - 60 TPI - Bead: Wire - Type: Clincher - Max pressure: 60psi - ETRTO: 71-507
$14.99 - $19.99
Lighter tubes for faster wheels Improve the performance of your bike by reducing rotational weight with Bontrager Lightweight tubes. They feature a slimmer butyl wall to improve ride feel and reduce weight. - Product details - 0.6mm wall thickness - Equipped with removable valve cores - 100% inspected for guaranteed quality
$29.99
Equip your urban commuter or road bike with a reliable set of tires. The R1 road tire is a great place for any cyclist to start. The 60TPI casing and Hard-Case Lite puncture protection keeps the weight down and durability up, while providing excellent traction. - Advanced tread gives super-low rolling resistance with excellent cornering grip - Unique Aero Wing bead eliminates gap between rim and tire for aero advantage
$9.99 - $14.99
The industry standard comes in all sizes. Premium-quality Bontrager Standard butyl rubber tubes feature a 0.9mm wall thickness for the perfect balance of weight savings and durability. - 0.9mm wall thickness - Equipped with removable valve cores - 100% inspected for guaranteed quality - Best value 27-inch tire size equivalents - 700cx 23 – 25 also fits 27 x 7/8 – 1 - 700c x 28 – 32 also fits 27 x 1-1/8 – 1-1/4 - 700c x 35 – 44 also fits 27 x 1-3/8 – 1-3/4
$9.99 - $14.99
The industry standard comes in all sizes Premium-quality Bontrager Standard butyl rubber tubes feature a 0.9mm wall thickness for the perfect balance of weight savings and durability. - 0.9mm wall thickness - Equipped with removable valve cores - 100% inspected for guaranteed quality - Best value 27-inch tire size equivalents - 700c x 28 – 32 also fits 27 x 1-1/8 – 1-1/4 - 700c x 35 – 44 also fits 27 x 1-3/8 – 1-3/4
$24.99
Feel fast, safe, and stable in any weather and on any road on the T1 road touring tire. With super tough nylon casing and durable compound for added wear and traction, this tire is ideal for touring, training, or recreational riding. Key features - Engineered tread design for confidence in wet or dry conditions - Durable compound gives long tread life - Extra-strong nylon casing - 30 TPI - Wire bead - Clincher
$16.99 - $79.99
Get unbelievable traction in even the slickest winter conditions by adding Bontrager Tire Studs to your stud-ready winter tires. The carbide tipped design provides biting traction with an easy to install, durable design. Key features - Carbide-tipped design provides long lasting and durable traction - Compatible with Bontrager stud-ready tires - Use Bontrager Tire Stud Tool for easy installation
$24.99
A kid-sized MTB tire with all of the technology and performance of the larger sizes. Kid-friendly fit, grown-up performance The XR1 Kids' is a durable, kid-friendly tire with the same reliable traction and performance as the grown-up versions. It rolls fast, features a versatile tread for a variety of trail conditions, and keeps weight down so little rippers can quickly gain speed and keep momentum through corners and up hills. Product details - Excels in firm and fast conditions - Offers fast-rolling and predictable cornering with consistent traction Specifications - Size: 24" x 2.25" - Diameter: 24" - Width: 2.25" - TPI: 27 TPI - Durometer: 60a - Bead: Wire - Type: Clincher - Max pressure: 50psi - ETRTO: 57-507 - Weight: 325g
$12.00 - $90.00
45NRTH utilizes a two-piece construction method to create a reliable and high-performing bicycle tire stud with a concave carbide-aluminum design. The open space and edges created by the large concave crown result in twice the surface area for increased traction and grip. - Concave tip for traction, durability, and longevity - Aluminum base to save weight - Compatible with 45NRTH stud insertion tool - Compatible with all studdable 45NRTH tires - We design 45NRTH tires for extreme winter cycling applications. We do not recommend this product be used with power assist bikes as the additional torque and system weight can lead to pre-mature casing wear and stud loss.
$103.95 - $259.99
Dillinger 4 is a fast traction studded fat bike tire. The tightly spaced center tread rolls quickly, while taller, braced side lugs improve cornering in snowy conditions. Carefully positioned studs allow for railing icy, off-camber singletrack with confidence and control. - Braced side lugs for improved cornering - Directional center lugs for rolling speed and braking traction - Replacement studs and stud insertion tool sold separately - Replacement studs and stud insertion tool sold separately
$135.00 - $260.00
The extra width of the Dillinger 5 provides flotation over loose snow additional grip while turning, accelerating or braking on ice and packed snow. Available in both studded and non-studded configurations. The studded version comes with 258 concave, aluminum carbide tip studs to provide extra bite and increased durability. - Carbide studs grip ice - Braced side lugs improve cornering - Tubeless Ready - We design 45NRTH tires for extreme winter cycling applications. We do not recommend this product be used with power assist bikes as the additional torque and system weight can lead to pre-mature casing wear and stud loss.
$13.50 - $125.00
45NRTH utilizes a two-piece construction method to create a reliable and high-performing bicycle tire stud, featuring a concave carbide-aluminum design. The super-sized concave crown creates open space and inside edges of the bowl, resulting in twice the surface area for increased traction and grip. - Concave tip for durability and longevity - Aluminum base to save weight - Compatible with the 45NRTH stud insertion tool - Compatible with all studdable 45NRTH tires - Large stud offers more bite than regular concave stud and less rolling resistance than XL stud - We design 45NRTH tires for extreme winter cycling applications. We do not recommend this product be used with power assist bikes as the additional torque and system weight can lead to pre-mature casing wear and stud loss.
$121.50 - $149.99
Vanhelga is a fat bike tire designed for trail riding in loose snow. It brings traction to a new level with dual-compound rubber, triple-siped shoulder knobs, and an open tread pattern that sheds snow. Vanhelga sheds snow and tracks flawlessly when the trail becomes soft and sloppy. - 120 TPI tubeless-ready casing - Ramped center lugs for rolling efficiency - Aggressively siping for grip - Shovel-design side lugs for predictable braking and cornering - We design 45NRTH tires for extreme winter cycling applications. We do not recommend this product be used with power assist bikes as the additional torque and system weight can lead to premature casing wear and stud loss. - Always check with your rim manufacturer to verify rim & tire compatibility before assembly or use
$252.00
From loose snow to icy freeze-thaw and everything in between, Wrathchild craves the best and worst winter conditions. - XL Concave Studs - Deep lugs provide accelerating, braking, and cornering traction - Open tread pattern sheds snow - We design 45NRTH tires for extreme winter cycling applications. We do not recommend this product be used with power assist bikes as the additional torque and system weight can lead to pre-mature casing wear and stud loss.
$189.99 - $280.00
From loose snow to icy freeze-thaw and everything in between, Wrathchild craves the best and worst winter conditions. Deep center lugs aggressively claw into unconsolidated snow for extreme acceleration and braking traction. Super tall side lugs dig into loose snow to provide predictable and confident cornering. Encounter sheer ice on your ride and Wrathchild’s concave studs tear into the surface. - Deep, aggressive lugs dig into snow - Tall side lugs provide cornering confidence - 252 concave studs tear into slick surfaces - Tubeless ready - We design 45NRTH tires for extreme winter cycling applications. We do not recommend this product be used with power assist bikes as the additional torque and system weight can lead to pre-mature casing wear and stud loss
$270.00
Wrathlorde is an extreme-conditions fat bike tire designed for ultimate traction on challenging surfaces. Aggressive, tightly-spaced lugs decrease rolling resistance without compromising on traction, while 300 XL concave studs bite into ice for complete confidence. - 120 TPI tubeless-ready casing - Aggressive, tightly spaced center lugs with siping for a blend of rolling speed and traction - Tall side lugs for traction in corners - 300 XL Concave Studs for ultimate traction on ice - Always check with your rim manufacturer to verify rim & tire compatibility before assembly or use
$16.20 - $140.00
45NRTH utilizes a two-piece construction method to create a reliable and high-performing bicycle tire stud, featuring a concave carbide-aluminum design. The super-sized concave crown creates open space and inside edges of the bowl, resulting in twice the surface area for increased traction and grip. - Concave tip for durability and longevity - Aluminum base to save weight - Compatible with the 45NRTH stud insertion tool - Sold in a pack of 100 - XL Stud features a larger carbide tip diameter for increased traction
$36.00
• Synthetic elastomer gasket with 2X the holding power and 5X wear resistance of traditional gasket materials • Two stage seal design, improves sealing and stability on all presta valve stems • Adjustable compression, user can tighten the cap to increase holding power by 4X and compensate for wear •15 degree stem angle reduces stress on the valve stem from pump hose • 12.0g
$69.00
The Zipp G40 XPLR is a wide (40mm) tire designed for control, which translates in the gravel world to higher overall speed. In developing this tire, Zipp began with a speed-carrying chevron center-tread pattern that transitions to an inverted soccer cleat design, then added XC-style knobs on the edges that offer the ability to dig in when you need it. And, amid all this, durability was crucial. The tire's casing and bead-to-bead puncture protection strip navigates the fine line between supple and stiff so that grip and performance do not suffer while making an incredibly durable gravel tire. The tire's 40mm width was carefully selected to be most effective with its tread pattern while also fulfilling riders' evolving preferences for wider tires during gravel events and off-pavement riding. It's just what you need for gnarly, all-day riding. It performs exceptionally well with Zipp's widest and most versatile 700c rim, the 303. - High-performance gravel and adventure tire - Aggressive cornering side knobs for excellent control - Fast-rolling center section - 30-65 psi - Tubeless Ready, tube compatible - Hookless compatible - ETRTO 40-622 (700x40c) - 120 TPI - Tan sidewall - Aramid bead-to-bead puncture protection that is very resistant to sidewall cuts - Hookless compatible - Weight: 480g
$20.00
- Designed to improve rotational stability by decreasing rotational mass at the valve body - Lightweight aluminum Presta-valve body - Removable valve core - Extenders are available and sold separately
$62.00
Tubeless Valve/Tape Kit - Includes Tape, 2 Universal Valves & 1 Valve Core Wrench
$15.00
Zipp's Valve Extension extends your threaded Presta valve to accommodate deep dish rims. Use these extenders with your favorite Zipp wheels to make short work of pumping up your tires.
$15.00
Precision engineered for precise inflation of your Zipp wheels, these Zipp Tangente Valve Extenders take the hassle out of short Presta valves. - For use with threaded Presta (non-removable core) tubes - Knurled end to keep pump from slipping - Available in all lengths to match all Zipp wheels - 3mm hex broach in the barrel to guarantee a perfect seal when tightened
$15.00 - $21.00
Works with Zipp butyl inner tubes with a removable core as well as other leading tubular tires and inner tubes that have removable cores. Available as a kit (3 extenders and 2 wrenches) or individually. - For use with removable valve core Presta tubes - Knurled end to keep pump from slipping - 3mm hex broach in the barrel to guarantee a perfect seal when tightened - Integrated air seal