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Flat less. Ride more.

Protect yourself from flats with Bontrager Thorn Resistant tubes. Asymmetric design uses thicker rubber on the tread side and thinner rubber elsewhere, which saves weight while maximizing puncture protection.

Product details

  1. 4.1mm thickness (tread side)
  2. Asymmetric extrusion puts extra rubber along tire sidewall and tread zones
  3. 100% inspected for guaranteed quality
  4. Purchase 20 tubes to receive a full case

How To: Fix a Flat Bike Tire

Flat? Fixed. Our simple how-to video will show you how to get back on two wheels in no time flat.

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Size 29" x 1.9-2.125", 48mm 700C x 20-25mm, 48mm 700C x 28-32mm, 48mm 700C x 35-44mm, 48mm
Diameter 29" 700C 700C 700C
Width 1.9-2.125" 20-25mm 28-32mm 35-44mm
Length 48mm 48mm 48mm 48mm
Valve Presta Presta Presta Presta
ETRTO 50/54-622 20/25-622 28/32-622 35/44-622
Weight 680g 280g 380g 501.75g
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, and materials.
Weights are based off Trek pre-production products at time of publication. Weights may vary in final production.

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