Tested: Bontrager XR4 Expert TLR Tyre

The not-so-minor details


Bontrager XR4 Expert TLR (tubeless ready)


Trek Bike Australia






26 x 2.35"


Light for its class.
Durable compound.
Great grip on most surfaces.


More sealant than normal was required.
Not the fastest rolling tyre out there.

Bontrager have really hit the mark with the XR4 tyres for all round aggressive trail use. The XR4s are quite voluminous for a 2.35″ tyre and exhibit a wide footprint. That, in combination with a round profile, make for a lot of traction and predictable cornering behaviour.

The Bontrager XR4s are aggressive trail tyres.

The blocky tread is somewhat of a wonderment, being very grippy on the loose stuff as well as equally adherent on bare rock – something we weren’t expecting. This property in a tyre can often result from a softer, faster wearing compound – not so with the XR4s. The XR4s actually surprised us with their durability and resilience considering the irreverent treatment we gave them.

We only had one small gripe with the tyre in that we had to use a bit more sealant than we were used to prevent them losing air during the ride. Otherwised they ticked all the boxes.

Overall a well mannered tyre and a better choice for those whose trail choice is more rocky road than caramel slice.

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