Parts & Accessories

The Wolf Tooth Rear Axle uses a captive steel washer under the head to reduce friction on the dropout face. This protects your expensive frame, transfers more of the tightening torque to clamping load for a stiffer interface and prevents the axle from sticking or galling when you want to remove it. - Made in Minnesota to aerospace standards

The Wolf Tooth Rear Axle uses a captive steel washer under the head to reduce friction on the dropout face. This protects your expensive frame, transfers more of the tightening torque to clamping load for a stiffer interface and prevents the axle from sticking or galling when you want to remove it. - Made in Minnesota to aerospace standards

Precision machined steel axle spacers. Great for fine tuning hub spacing or as replacement axle spacers. - Outside Diameter: 16mm - Inside Diameter: 10mm - Thickness: 0.5mm

Precision-machined aluminum axle spacers. Great for fine tuning hub spacing or as replacement axle spacers. - Outside Diameter: 16mm - Inside Diameter: 10mm - Thickness: 5mm

125 piece assortment of precision machined axle spacers (0.5mm to 5mm thickness). - Outside Diameter of Spacers: 16mm - Inside Diameter of Spacers: 10mm Kit includes: - (10) - 0.5mm thick spacers - (30) - 1mm thick spacers - (30) - 2mm thick spacers - (25) - 3mm thick spacers - (15) - 4mm thick spacers - (15) - 5mm thick spacers

Wheels Manufacturing Axle Spacers help you dial in your hub spacing to ensure correct fit and side-to-side spacing in the rear triangle without having to alter the wheel's dish. - Spacers come in bags of 20

Wheels Mfg axles are made from aircraft quality 4130 alloy steel, made specifically for Wheels Mfg. It’s heat-treated to increase strength without making the axle brittle. Rolled threads make for easy assembly of cones & locknuts. - Fits many Shimano / Japanese rear hubs with 126mm spacing - Type: Hollow Axle - Threads: 10mm x 1 - Diameter: 10mm - Length: 137mm - 1 axle per bag

Wheels Mfg axles are made from aircraft quality 4130 alloy steel, made specifically for Wheels Mfg. It’s heat-treated to increase strength without making the axle brittle. Rolled threads make for easy assembly of cones & locknuts. - Fits many Shimano / Japanese rear hubs with 130mm spacing - Type: Hollow Axle - Threads: 10mm x 1 - Diameter: 10mm - Length: 141mm - 1 axle per bag

Wheels Mfg axles are made from aircraft quality 4130 alloy steel, made specifically for Wheels Mfg. It’s heat-treated to increase strength without making the axle brittle. Rolled threads make for easy assembly of cones & locknuts. - Fits many Shimano / Japanese rear hubs with 135mm spacing - Type: Hollow Axle - Threads: 10mm x 1 - Diameter: 10mm - Length: 146mm - 1 axle per bag

Wheels Mfg axles are made from aircraft quality 4130 alloy steel, made specifically for Wheels Mfg. It’s heat-treated to increase strength without making the axle brittle. Rolled threads make for easy assembly of cones & locknuts. - Fits many Shimano / Japanese rear hubs - Type: Solid Axle - Threads: 10mm x 1 - Diameter: 10mm - Length: 174mm - 1 axle per bag

Wheels Mfg axles are made from aircraft quality 4130 alloy steel, made specifically for Wheels Mfg. It’s heat-treated to increase strength without making the axle brittle. Rolled threads make for easy assembly of cones & locknuts. - Fits Campagnolo / Italian rear hubs with 130mm spacing - Type: Hollow Axle - Threads: 10mm x 26tpi - Diameter: 10mm - Length: 141mm - 1 axle per bag

Wheels Mfg axles are made from aircraft quality 4130 alloy steel, made specifically for Wheels Mfg. It’s heat-treated to increase strength without making the axle brittle. Rolled threads make for easy assembly of cones & locknuts. - Fits many Taiwanese hubs with 126mm spacing - Type: Hollow Axle - Threads: 9.5mm x 26tpi - Diameter: 9.5mm - Length: 137mm - 1 axle per bag

Wheels Mfg axles are made from aircraft quality 4130 alloy steel, made specifically for Wheels Mfg. It’s heat-treated to increase strength without making the axle brittle. Rolled threads make for easy assembly of cones & locknuts. - Fits many Taiwanese hubs with 130mm spacing - Type: Hollow Axle - Threads: 9.5mm x 26tpi - Diameter: 9.5mm - Length: 141mm - 1 axle per bag

Wheels Mfg axles are made from aircraft quality 4130 alloy steel, made specifically for Wheels Mfg. It’s heat-treated to increase strength without making the axle brittle. Rolled threads make for easy assembly of cones & locknuts. - Fits many Taiwanese hubs with 135mm spacing - Type: Hollow Axle - Threads: 9.5mm x 26tpi - Diameter: 9.5mm - Length: 146mm - 1 axle per bag

Wheels Mfg axles are made from aircraft quality 4130 alloy steel, made specifically for Wheels Mfg. It’s heat-treated to increase strength without making the axle brittle. Rolled threads make for easy assembly of cones & locknuts. - Fits many Shimano / Japanese front hubs - Type: Solid Axle - Threads: 9mm x 1 - Diameter: 9mm - Length: 155mm - 1 axle per bag

Wheels Mfg axles are made from aircraft quality 4130 alloy steel, made specifically for Wheels Mfg. It’s heat-treated to increase strength without making the axle brittle. Rolled threads make for easy assembly of cones & locknuts. - Fits many Shimano / Japanese front hubs - Type: Hollow Axle - Threads: 9mm x 1 - Diameter: 9mm - Length: 110mm - 1 axle per bag

Wheels Mfg axles are made from aircraft quality 4130 alloy steel, made specifically for Wheels Mfg. It’s heat-treated to increase strength without making the axle brittle. Rolled threads make for easy assembly of cones & locknuts. - Fits Campagnolo / Italian rear hubs - Type: Solid Axle - Threads: 10mm x 26tpi - Diameter: 10mm - Length: 174mm - 1 axle per bag

Wheels Mfg axles are made from aircraft quality 4130 alloy steel, made specifically for Wheels Mfg. It’s heat-treated to increase strength without making the axle brittle. Rolled threads make for easy assembly of cones & locknuts. - Fits many Taiwanese hubs - Type: Solid Axle - Threads: 9.5mm x 26tpi - Diameter: 9.5mm - Length: 155mm - 1 axle per bag

Wheels Manufacturing cones are precision machined to Shimano Ultegra or higher quality standards. This ensures that our cones fit correctly, run smoothly and have a long service life. - Compatible with Shimano Rear 10mm x 1 axle - Rear Left Cone - Cone Wrench Size: 15mm - Threads: 10mm x 1 - Diameter: 16.9mm - Length: 15mm - 1 cone per bag - Note: O-ring / seal not included. Check the seal groove closely. This cone has a wider groove than cone CN-R024. COMPATIBLE HUBS: - Ultegra 6401 7-speed Rear - Ultegra 6402 8-speed Rear - 105 SC 1055 8-speed Rear - 105 SC 1056 7-speed Rear - XT-II M732 7-speed Rear

Wheels Manufacturing cones are precision machined to Shimano Ultegra or higher quality standards. This ensures that our cones fit correctly, run smoothly and have a long service life. - Compatible with Shimano Rear 10mm x 1 axle - Shimano Rear Cone - Cone Wrench Size: 15mm - Threads: 10mm x 1 - Diameter: 16.9mm - Length: 15mm - 1 cone per bag Note: O-ring / seal not included. Check the seal groove closely. This cone has a narrower groove than cone CN-R002. COMPATIBLE HUBS: - 105 FH-5700, 9 speed (right side cone) - 105 SC 1051, 7 Speed Rear - RX100 A551, 8 Speed Rear - RSX 410, 7 Speed Rear - Deore LX M550, 7 Speed Rear - Deore Mtn LX M550, 7 Speed Rear

Wheels Manufacturing cones are precision machined to Shimano Ultegra or higher quality standards. This ensures that our cones fit correctly, run smoothly and have a long service life. - Compatible with Shimano Front 9mm x 1 axle - Cone Wrench Size: 13mm - Threads: 9mm x 1 - Diameter: 14.8mm - Length: 10.5mm - 1 cone per bag - Note: O-ring / seal not included. COMPATIBLE HUBS: - Road 400 CX Front - HB-RM40 Front - Shimano HB-RM40 Front - HB-RA50 Front

Wheels Manufacturing cones are precision machined to Shimano Ultegra or higher quality standards. This ensures that our cones fit correctly, run smoothly and have a long service life. - Compatible with Shimano Front 9mm x 1 axle - Cone Wrench Size: 13mm - Threads: 9mm x 1 - Diameter: 14.8mm - Length: 10.6mm - 1 cone per bag - Note: O-ring / seal not included. COMPATIBLE HUBS: - Shimano HB-C201 Front - 105 HB-1050 Front - Deore LX/Mtn LX Front - STX HB-MC32/30 Front - Shimano HB-A410, HB-A416 Front

Wheels Manufacturing cones are precision machined to Shimano Ultegra or higher quality standards. This ensures that our cones fit correctly, run smoothly and have a long service life. - Compatible with Shimano Rear 10mm x 1 axle - Shimano Left Rear Cone - Cone Wrench Size: 15mm - Threads: 10mm x 1 - Cone Diameter: 17.0mm - Dust Seal Diameter: 25.5mm - Length: 16.0mm - 1 cone per bag COMPATIBLE HUBS: - XT M737, 8-spd Rear - STX-RC MC38, 8-spd Rear - STX/STX-RC MC30/32/33, 7-spd Rear - Alivio MC18, 8-spd Rear - Alivio MC12, 7-spd Rear - Acera-X MC290, 7-spd Rear - Altus RM-40, 7-spd Rear - FH-R080 Silent Hub, 8-spd Rear - FH-R050 Silent Hub, 7-spd Rear

Wheels Manufacturing cones are precision machined to Shimano Ultegra or higher quality standards. This ensures that our cones fit correctly, run smoothly and have a long service life. - Fits: Joytech, Joy U, KK 10mm x 1, rear - Compatible with 10mm x 1 axle - Cone Wrench Size: 15mm - Threads: 10mm x 1 - Diameter: 17.0mm - Length: 13.8mm - 1 cone per bag COMPATIBLE HUBS: - Joytech, Joy U, KK 10mm x 1, rear - Taiwanese rear hubs with 10mm x 1 axle

Wheels Manufacturing cones are precision machined to Shimano Ultegra or higher quality standards. This ensures that our cones fit correctly, run smoothly and have a long service life. - Fits: Sovos 9mm x 1, front hub - Compatible with 9mm x 1 axle - Cone Wrench Size: 13mm - Threads: 9mm x 1 - Diameter: 15.0mm - Length: 12.8mm - 1 cone per bag COMPATIBLE HUBS: - Sovos 9mm x 1, front hub - Taiwanese and similar front hubs with 9mm x 1 axle

Wheels Manufacturing cones are precision machined to Shimano Ultegra or higher quality standards. This ensures that our cones fit correctly, run smoothly and have a long service life. - Fits: JoyTech, Joy U, KK 9mm x 1, front hub - Compatible with 9mm x 1 axle - Cone Wrench Size: 15mm - Threads: 9mm x 1 - Diameter: 15.0mm - Length: 12.8mm - 1 cone per bag - Note: O-ring / seal not included. COMPATIBLE HUBS: - JoyTech, Joy U, KK 9mm x 1, front hub - Taiwanese front hubs with 9mm x 1 axle

Wheels Manufacturing cones are precision machined to Shimano Ultegra or higher quality standards. This ensures that our cones fit correctly, run smoothly and have a long service life. - Fits: Joytech 9mm x 26, front hub - Compatible with 9mm x 26 axle - Cone Wrench Size: 13mm - Threads: 9mm x 26 - Diameter: 15.0mm - Length: 12.8mm - 1 cone per bag - Note: O-ring / seal not included. COMPATIBLE HUBS: - Joytech 9mm x 26, front hub - Taiwanese hubs with 9mm x 26 axle - 105 SC 1055 8-speed Rear - 105 SC 1056 7-speed Rear - XT-II M732 7-speed Rear

Wheels Manufacturing cones are precision machined to Shimano Ultegra or higher quality standards. This ensures that our cones fit correctly, run smoothly and have a long service life. - Fits: JoyTech 10mm x 26, rear hub - Compatible with 10mm x 26 axle - Cone Wrench Size: 15mm - Threads: 10mm x 26 - Diameter: 17.0mm - Length: 13.8mm - Note: O-ring / seal not included. - 1 cone per bag COMPATIBLE HUBS: - JoyTech 10mm x 26, rear hub - Taiwanese hubs with 10mm x 26 axle

Wheels Manufacturing cones are precision machined to Shimano Ultegra or higher quality standards. This ensures that our cones fit correctly, run smoothly and have a long service life. - Fits: JoyTech 9mm x 1, front "parallax" style hub - Compatible with 9mm x 1 axle - Cone Wrench Size: 13mm - Threads: 9mm x 1 - Diameter: 15.0mm - Length: 11.0mm - 1 cone per bag COMPATIBLE HUBS: - JoyTech 9mm x 1, front "parallax" style hub - Taiwanese hubs with 9mm x 1 axle

Wheels Manufacturing cones are precision machined to Shimano Ultegra or higher quality standards. This ensures that our cones fit correctly, run smoothly and have a long service life. - Fits: JoyTech, Sovos, KK, KT 9.5mm x 26tpi - Compatible with 9.5mm x 26tpi axle - Cone Wrench Size: 13mm - Threads: 9.5mm x 26 - Diameter: 15.0mm - Length: 12.8mm - 1 cone per bag COMPATIBLE HUBS: - JoyTech, Sovos, KK, KT 9.5mm x 26tpi - Taiwanese hubs with 9.5mm x 26tpi axle

Wheels Manufacturing cones are precision machined to Shimano Ultegra or higher quality standards. This ensures that our cones fit correctly, run smoothly and have a long service life. - Fits: JoyTech 9.5mm x 26, rear alloy, steel front hubs - Compatible with 9.5mm x 26tpi axle - Cone Wrench Size: 15mm - Threads: 9.5mm x 26 - Diameter: 17.0mm - Length: 13.8mm - 1 cone per bag COMPATIBLE HUBS: - Fits: JoyTech 9.5mm x 26, rear alloy, steel front hubs - Taiwanese hubs with 9.5mm x 26tpi axle

Wheels Manufacturing cones are precision machined to Shimano Ultegra or higher quality standards. This ensures that our cones fit correctly, run smoothly and have a long service life. - Compatible with Shimano Front 9mm x 1 axle - Cone Wrench Size: 13mm - Threads: 9mm x 1 - Diameter: 15.0mm - Length: 12.7mm - 1 cone per bag - Note: O-ring / seal not included. COMPATIBLE HUBS: - Ultegra 6400 Front - Shimano 105 HB-5500 Front - Shimano 105 HB-5501 Front - 105 SC 6400 Front

Wheels Manufacturing cones are precision machined to Shimano Ultegra or higher quality standards. This ensures that our cones fit correctly, run smoothly and have a long service life. - Compatible with Shimano Rear 10mm x 1 axle - Shimano Left Rear Cone - Cone Wrench Size: 15mm - Threads: 10mm x 1 - Cone Diameter: 17.0mm - Dust Seal Diameter: 25.5mm - Length: 16.0mm - 1 cone per bag COMPATIBLE HUBS: - XT M750, 9-spd Rear - XT M760, 9-spd Rear - XT M765, 9-spd Rear - Deore LX M570, 9-spd Rear

Wheels Manufacturing cones are precision machined to Shimano Ultegra or higher quality standards. This ensures that our cones fit correctly, run smoothly and have a long service life. - Compatible with Shimano Rear 10mm x 1 axle - Shimano Right Rear Cone - Cone Wrench Size: 15mm - Threads: 10mm x 1 - Diameter: 17.0mm - Length: 9.0mm - 1 cone per bag COMPATIBLE HUBS: - XT M750, 9-spd Rear - XT M760, 9-spd Rear - XT M765, 9-spd Rear - Deore LX M570, 9-spd Rear

Wheels Manufacturing cones are precision machined to Shimano Ultegra or higher quality standards. This ensures that our cones fit correctly, run smoothly and have a long service life. - Compatible with Shimano Front 9mm x 1 axle - Cone Wrench Size: 13mm - Threads: 9mm x 1 - Cone Diameter: 15.0mm - Dust Seal Diameter: 22mm - Length: 12.7mm - 1 cone per bag COMPATIBLE HUBS: - Shimano Deore LX HB-M570 Front - Shimano Deore XT HB-M750 Front

Wheels Manufacturing cones are precision machined to Shimano Ultegra or higher quality standards. This ensures that our cones fit correctly, run smoothly and have a long service life. - Compatible with Shimano Front 9mm x 1 axle - Cone Wrench Size: 13mm - Threads: 9mm x 1 - Cone Diameter: 14.8mm - Dust Seal Diameter: 22mm - Length: 10.6mm - 1 cone per bag COMPATIBLE HUBS: - Tiagra 4400 Front - Shimano Sora HB-3300 Front - Shimano Acera HB-M330 Front - Shimano Nexave HB-T300 Front

Wheels Manufacturing cones are precision machined to Shimano Ultegra or higher quality standards. This ensures that our cones fit correctly, run smoothly and have a long service life. - Compatible with Shimano Rear 10mm x 1 axle - Shimano Rear Right Cone - Threads: 10mm x 1 - Diameter: 16.9mm - Length: 12.5mm - Cone Wrench Size: 15mm - 1 cone per bag COMPATIBLE HUBS: - Sora FH-3300, 9-spd Rear

Machined aluminum spacers for freehubs. Great for fine tuning freewheel and cassette placement or improving chainline. Also good for bottom bracket spacing with BSA BB cups. - Inner Diameter: 35.0mm - Outer Diameter: 40.7mm - Material: Aluminum - Finish: Polished - Bags of 10

Get your WeThePeople Arrow Front Hub Axle/Cone Set and freshen up that front end that's a little wobbly after that last time you cased it on the spine.

Did you trash the front bearings on your WeThePeople Arrow front hub? It happens, that just means you're riding a lot. Fear not, we've got you covered with this bearing set from WeThePeople.

Keeping the front wheel securely on the bike is kinda important. This WeThePeople Arrow Front Hub Female Bolt Set keeps your wheel right where it belongs. Sticking the nose manual is up to you.

A few too many drops to flat? Get your Arrow Rear Hub back in solid working order with this replacement axle/cone set from WeThePeople.

- Cassette Body Type: Single Cog Driver - Drivetrain Speeds: Single Speed 1/2" x 1/8" - Material: Steel - Tooth Count: 9

When you own a freecoaster as good as the Helix, you're going to want to keep it protected. WTP's Helix driver guards work on the drive side of the Helix freecoaster and replace the cones for a perfect fit without having to spread your dropouts. - Fits Helix V1 and Helix V2 freecoaster hubs - Available in 7075-T6 alloy or Nylon Fiberglass - Comes with heat-treated chromoly adaptor to replace hub cone nuts for perfect fit

WTP's Helix hub guards are designed to work on The Helixline of hubs, replacing the cones for a perfect fit without having to spread your dropouts. - Includes heat-treated chromoly adaptor to replace hub cone nuts for a perfect fit - Rear Hub guards are compatible with Helix V1 and Helix V2 freecoaster hubs and many other "KHE" style freecoasters on the market

When you own a freecoaster as good as the Helix, you're going to want to keep it protected. WTP's Helix hub guards work on the non-drive side of the Helix freecoaster and replace the cones for a perfect fit without having to spread your dropouts. - Fits Helix V1 and Helix V2 freecoaster hubs - Available in 7075-T6 alloy or Nylon Fiberglass - Comes with heat-treated chromoly adaptor to replace hub cone nuts for perfect fit

WeThePeople's Helix Rear Driver Guard protects the driver on your beautiful Helix hub during grinds. Made from 7075 aluminum with a tough inner steel core, this guard perfectly fits the drive-side of your Helix rear hub. Grind with confidence!

Helix Rear Hub 14mm Axle/Cone Set

When your idea of "a ride around town" involves 180s down stairs, reverse manuals on planter boxes, and landing sick gaps backward, even your sweet WeThePeople Helix Freecoaster is going to eventually wear out. Keep that freecoaster free with this replacement Helix driver and get back to tearing it up on the street or in the park.

Protect your beautiful Helix hub on grinds with WeThePeople's Helix Rear Hub Guard. Made from 7075 aluminum with a tough inner steel core, this guard perfectly fits the non-drive side of your Helix rear hub. Grind with confidence!

This is an axle and cone set for WTP Supreme hubs. Pop this in to freshen up that bombed-out hub after too many aerial ghost rides.

Did you trash the front bearings on your WTP Supreme front hub? It's okay, that just means you're going big enough to make it count. Fear not, we've got you covered with this bearing set from WeThePeople.

WeThePeople's Supreme Hub Guards are made of low-friction nylon fiberglass. Simply replace the cones on your Supreme Front and Cassette Hubs for a perfect fit without having to spread your dropouts. Available for both front and rear. These guards now feature a heat-treated chromoly insert for longer life.

Simply replace the cones on your Supreme front and cassette hubs for a perfect fit without having to spread your dropouts. Available in front, rear, and drive side options. These guards now feature a heat-treated chromo insert for longer life.

Supreme Hub Pawl Set, 6 Pieces Including Spring

Did you trash the bearings on your WTP Supreme rear hub? It's okay, that just means you're going big enough to make it count. Fear not, we've got you covered with this bearing set from WeThePeople.

WeThePeople Supreme Rear Hub 14mm Axle/Cone Set

TCS Max-Flow Tubeless Valves feature an insert-compatible base, increased bore diameter, an integrated valve core remover, and an ergonomically designed nut that allows riders to properly tighten down the valve without the use of a tool. TCS Max-Flow Tubeless Valves feature a castellated base for multi-directional air flow out the sides, therefore preventing the airflow restriction that can happen when a tire insert is pushed up against a traditional valve opening. Insert Compatible Allows optimal air flow with inserts. Valve Core Removal Cap No need for pliers with a valve core remover in the cap! Fluted Easy-Grip Nut Ergonomic shape allows for hand tightening. D-Ring Rubber Grommet Protects the rim from damage. Universal Presta Valve Core Easily source replacements.

TCS rim tape is adhered to a tubeless rim to provide an airtight seal between the rim and tire. Our 11-meter rolls provide enough tape for five wheels, while our 55-meter rolls will provide enough tape for 27 wheels – that’s a lot of wheels. All rolls are available in 24, 26, 28, 30, 34, 40, 45 and 50mm widths. What width of TCS rim tape do you need? WTB recommends using tape that is 5mm wider than the inner rim width, which is measured as the distance between the inside edges of the bead hooks of a rim.

You know that feeling when you're just rippin' along and you hear the dreaded psssssssssssss sound from your tire? Well have no fear the TCS Tire Plug kit is here. It's easy to use and will get you back on two wheels in no time. More time for miles of smiles, rather than expletives on the side of the road or trail. Yea, we have all been there. The TCS Tire Plug Kit uses durable "Rocket" anchors (because they look like tiny rockets) that stay in your tire and hold the plug in place. You will not lose a plug. The anchor will hold it in place like a ship at dock. But wait... there's more... You can reuse the anchors when you're all done. It's like a treasure chest when you need to swap-out your tires. The Rocket Plug Kit also features an 'Extra Hand' tool under the smaller cap. If you haven't pre-loaded the Rocket, the Extra Hand will temporarily plug the hole and take the pressure off while you prepare your Rockets and plugs. We went through a lot of arguments at WTB to get this thing dialed and man, we are so stoked on how it turned out. We hope you like it as much as we do. REUSABLE "ROCKET" ANCHORS Rocket anchors rotate once pushed into the tire and physically prevent the plug from pulling back through the tire when running higher pressure or through heavy cornering like traditional plugs can. Oh, we tried to pull it through, and we were holding up e-bikes from the plug. The anchor remains fixed in place until it’s removed from the inside of the tire and put back in the tool for future use. Reusable and Recyclable! Win, win! EXTRA HAND The Extra Hand (because who couldn't use an extra hand every once and a while) stopper can be pushed into the puncture to temporarily stop any loss of air while a rider determines how many tire plugs are needed and prepares to seal it. The Extra Hand can also be used as a reamer to create a more uniform hole for the tire plugs to seal. COMPACT AND LIGHT The TCS Rocket Tire Plug Kit is CNC’d from 6061 aluminum alloy with an integrated extra hand tool and plunger. It also has internal storage for four anchors (two large and two small included), and fifteen 1.5mm diameter tire plugs. Ready to Launch Rocket anchors can be preloaded with 1-4 tire plugs depending on the terrain and size of punctures riders typically encounter. Preloaded Rocket anchors are then placed on the plunger, ready to launch the moment a puncture occurs. The clock is ticking! TCS Tubeless TCS (Tubeless Compatible System) is WTB's standardized tubeless system. When you do get a puncture with a tubeless tire with sealant inside, this is a great way to fix it.