Bontrager XR4 2.4/29 or XR4 2.6 rear?- Mtbr.com
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  1. #1
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    Bontrager XR4 2.4/29 or XR4 2.6 rear?

    Should I swap out my 2019 Bontrager XR3 2.4/29 rear for an XR4 2.6 on my 2018 FEX 9.8? The XR3 2.4 (rear) has been great in CO front range this year but thinking of going to wider XR4 2.6 for fall as the XR3 wears out. Is 2.6 in back going to be a noticeably better climber/traction over a 2.4 XR4 or too heavy for long climbs? BTW, am running XR5 2.6 in front and it's very good. Thanks.

  2. #2
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    Weight won't be a factor. We're talking about 170g of weight that once spun up, won't make much of a difference. I run the 2.4 XR 4 and a 2.4 XR 3 (new) on my trail bike and I like the combo quite a bit. I think you can't lose out either way. The 2.4 XR4 is an amazing tire for the price, grip, compliance and mileage it'll go before wearing out. If you like the way 2.6 tires feel, then by all means go for the 2.6. Otherwise, shed the 1/3 of a pound and stick with the 2.4. Your choice and totally based on your preferences on this one.

  3. #3
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    I have an XR4 2.35 on my Remedy, and XR4 2.6 on my Prowler. I can't say the 2.6 seems to offer any additional traction under local trail conditions. It does seem more sensitive to pressure though.

  4. #4
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    Quote Originally Posted by morrison1 View Post
    Should I swap out my 2019 Bontrager XR3 2.4/29 rear for an XR4 2.6 on my 2018 FEX 9.8? The XR3 2.4 (rear) has been great in CO front range this year but thinking of going to wider XR4 2.6 for fall as the XR3 wears out. Is 2.6 in back going to be a noticeably better climber/traction over a 2.4 XR4 or too heavy for long climbs? BTW, am running XR5 2.6 in front and it's very good. Thanks.
    No,
    run a 2.6 in the front and the 2.4 in the rear
    Too Many .

  5. #5
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    I would run a XR4 2.6 up front and a 2.4 in the rear.

  6. #6
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    Don't rule out a 2.6 XR2 in the rear. It's lighter than a 2.4 XR4, provides more cush than a 2.4, faster than an XR4, and has a surprising amount of climbing grip due to its size. I was worried it wouldn't have enough grip for climbing but I have zero complaints.

    Whichever you choose you can try it and if you don't like it return it for a full refund with Bontrager's satisfaction guarantee.

  7. #7
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    I've run both on my '17 FEX.

    Con- heavier, a bit slower on climbs

    Pro- can run lower pressure, a bit more traction on tech climbing

    When running bontrager tires these days I go with 2.4XR4 f&r
    2020 Turbo Levo SL Expert Carbon

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