"Spot on"
"Mud, grease, wet roots, hard-packed, leaf-covered, you name it – these XR4s stick to everything and always tempt me to push harder and harder"
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4.5/5 stars
"One of our favourites... Excellent, stable but smooth ride feel, trustworthy all-conditions grip and reasonable roll"
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"Great all-rounders"
"They roll quickly, are predictable, brake well, provide excellent hold off-camber and are a reasonable weight with ample protection"
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"Fast-rolling with a predictable response"
"They’ve held up well, excelled in some of the sloppiest conditions I’ve ever ridden in and been both predictable and reliable in all situations"
Read moreHow to change a flat tyre
Flats happen, learn how to change your tube quickly so you can get back rolling.
Learn moreProduct features
Inner Strength
Our Inner Strength Casing is made of lightweight nylon inserts that provide strong, supple sidewall protection for added tyre durability.
Go tubeless
A properly set up tubeless system lets you run lower tyre pressure for better traction, added confidence and a smoother, faster ride.
Better together
Bontrager offers a complete tubeless system including wheels, tyres, sealant, valves, and rim strips. Every part of this set-up is designed to work smoothly together, for the best in performance and ease of use.
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.
Learn moreYour guide to MTB tyres
We'll help you find the right rubber for the trails you love to ride.
Find your tyreTry our tyre finder
The right tyres can make every ride better! Find the best tyres for however and wherever you ride.
Find your tyre| Size | 27.5" x 2.4" | 27.5" x 2.6" | 27.5" x 2.8" | 29" x 2.4" | 29" x 2.6" | 29" x 3.0" |
|---|---|---|---|---|---|---|
| Diameter | 27.5" | 27.5" | 27.5" | 29" | 29" | 29" |
| Width | 2.4" | 2.6" | 2.8" | 2.4" | 2.6" | 3.0" |
| TPI | 120 TPI | 120 TPI | 120 TPI | 120 TPI | 120 TPI | 120 TPI |
| Durometer | 61a/50a | 61a/50a | 61a/50a | 61a/50a | 61a/50a | 61a/50a |
| Bead | Folding | Folding | Folding | Folding | Folding | Folding |
| Type | Tubeless Ready (TLR)/Clincher | Tubeless Ready (TLR)/Clincher | Tubeless Ready (TLR)/Clincher | Tubeless Ready (TLR)/Clincher | Tubeless Ready (TLR)/Clincher | Tubeless Ready (TLR)/Clincher |
| Minimum pressure | 30 psi | -- | -- | 30 psi | -- | -- |
| Maximum pressure | 50 psi | 40 psi | 30 psi | 50 psi | 40 psi | 30 psi |
| ETRTO | 58-584 | 66-584 | 71-584 | 58-622 | 66-622 | 76-622 |
| Tread | Knobby | Knobby | Knobby | Knobby | Knobby | Knobby |
| Construction | Inner Strength | Inner Strength | Inner Strength | Inner Strength | Inner Strength | Inner Strength |
| Studdable | No | No | No | No | No | No |
| Sealant volume | 85 ml | 90 ml | 100 ml | 90 ml | 95 ml | 105 ml |
| Weight | 765g | 860g | 945g | 800g | 945g | 1100g |