"Consistent through all angles"
"The tight, small knobs of the GR1 create a fast-rolling tire with consistent grip on hardpack dirt and fine gravel."
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"Consistent bite at any lean angle"
"And the supple casing provides burp free riding at low pressure that’s surprisingly resistant to cuts and gashes"
Read moreAll your favorites, all in one place
Get all your favorite apparel from over 80 of the world's best cycling brands delivered right to your doorstep or local Trek retailer when you shop our curated online collection. If you're not 100% satisfied, you can return your purchase within 30 days for a full refund.
Shop all gearHow to change a flat tire
Flats happen, learn how to change your tube quickly so you can get back rolling.
Learn moreHow to pump up your tires
Setting your bike’s tire pressure correctly will give you a more comfortable ride with better grip and handling. Learn how.
Learn moreGR1 Tires
A gravel tire that rolls fast while providing confident traction across all road surfaces. Perfect for the road less travelled.
Inner Strength
Our Inner Strength Casing is made of lightweight nylon inserts that provide strong, supple sidewall protection for added tire durability.
A properly set up tubeless system lets you run lower tire pressure for better traction, added confidence, and a smoother, faster ride.
Better together
Bontrager offers a complete tubeless system including wheels, tires, sealant, valves, and rim strips. Every part of this setup is designed to work smoothly together, for the best in performance and ease of use.
How to set your tires up tubeless
Going tubeless adds performance, speed, and comfort to your ride and can even help seal punctures before they become flats. Bontrager makes tubeless setup simple, and we'll teach you everything you need to know to do it yourself.
Try our tire finder
The right tire can make every ride better! Find the best tire for however and wherever you ride.
Find your tire
30-Day Unconditional Guarantee
If for any reason you're not satisfied with a Bontrager or Trek aftermarket purchase, return the item, along with the original sales receipt to the original place of purchase within 30 days for an exchange or refund. Think of it as a 30-day test ride.
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| Size | 700C x 35mm | 700C x 40mm |
|---|---|---|
| Diameter | 700C | 700C |
| Width | 35mm | 40mm |
| TPI | 120 TPI | 120 TPI |
| Compound | 60a/52a | 60a/52a |
| Bead | Folding | Folding |
| Type | Tubeless Ready (TLR)/Clincher | Tubeless Ready (TLR)/Clincher |
| Max pressure | 50psi | 50psi |
| ETRTO | 35-622 | 40-622 |
| Puncture protection | Inner Strength | Inner Strength |
| Studdable | No | No |
| Sealant volume | -- | 55mL |
| Weight | 390g | 430g |