Are 3.8 tires 27.5 True fat bike tires ?- Mtbr.com
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  1. #1
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    Are 3.8 tires 27.5 True fat bike tires ?

    I see 3.8 everywhere now & 27.5....

    The guy @ trek told me a 27.5 v a 26 x 4.8 is a better roll ... a better all around tire ...

    But I have to ask - isnít a 3.8 just a Stache ? Plus 4 / 6 inches in true width ?

  2. #2
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    3.7 was the original endomorph and was a true fat bike tire.



    Quote Originally Posted by TheNatureBoy View Post
    I see 3.8 everywhere now & 27.5....

    The guy @ trek told me a 27.5 v a 26 x 4.8 is a better roll ... a better all around tire ...

    But I have to ask - isnít a 3.8 just a Stache ? Plus 4 / 6 inches in true width ?

  3. #3
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    3.8 is a fat tire. Check fat bike race requirements. 3.8 is almost always the stated minimum.

  4. #4
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    Quote Originally Posted by TheNatureBoy View Post
    The guy @ trek told me a 27.5 v a 26 x 4.8 is a better roll ... a better all around tire ...
    I read an article this morning about whether or not plus is disappearing as a standalone size, plus I believe is 2.6-3.0. Trek went to the B (27.5) fat from the traditional 26 fat, which begins at 3.7/8. The Bfat will possibly be faster on groomed trails and probably on the road as well. This is certainly what a salesperson selling those bikes would say if you told them groomed trails and some road were your intended paths. The 26 4.8 tire will have better float in the snow off groomed trails, which is important for the terrain off trail. Some enthusiasts want bigger. Both frames can conceivably fit 29+ wheels and tires as well. It's really preference of use. What are you intending on riding?

    RMB SuziQ and Kona Wozo are also Bfat.
    I don't know why,... it's just MUSS easier to pedal than the other ones.

  5. #5
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    ^^^ Many frames can B Fat and more and more manufacturers are offering it as an option. Framed and Otso are a couple off the top of my head.

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