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Thread: Tube sizes

  1. #1
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    Tube sizes

    I just bought some new Deetraks and a 2.4 ardent front tire and 2.4 highroller rear. My question is about tube sizes. Should I get a 2.1 to 2.4 or go with something like a 2.4 to 2.7. I have never tried to determine which way is the best in the past. I am just wondering if it really makes a difference? Oh yeah it's for a DH rig.

  2. #2
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    I'm betting you're in for a lot of advice to go tubeless, but for tubes always run the widest one that will fit your tire without bunching (less prone to flatting). 2.4/2.7 would probably work great.

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    I am not comfortable with going tubeless.

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    Tubes expand a lot. I run 26x2.1-2.4 in my 29 2.25 RaRa Performance at 18 and sometimes as low as 15 before I catch it in the front annd 20-25 rear. No flats and I think the stretched tube is a contributer..

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    Quote Originally Posted by eb1888 View Post
    Tubes expand a lot. I run 26x2.1-2.4 in my 29 2.25 RaRa Performance at 18 and sometimes as low as 15 before I catch it in the front annd 20-25 rear. No flats and I think the stretched tube is a contributer..
    You ride a 26" tube in a 29er? Never thought it would work.

  6. #6
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    Quote Originally Posted by eb1888 View Post
    Tubes expand a lot. I run 26x2.1-2.4 in my 29 2.25 RaRa Performance at 18 and sometimes as low as 15 before I catch it in the front annd 20-25 rear. No flats and I think the stretched tube is a contributer..

    They do expand a lot, a 26 tube will go to about 6 ft. of bigger diameter before it blows! You may be right about the stretched tube helping in regards to flat prevention because many tube failures are broken valve stems, usually due to running low pressure as the tire can creep under braking and acceleration and force the valve stem to bend .

    I never thought of it but stretching a 26 to a 29 might help prevent this problem, but stretching a 1.75 tube to fit a 2.3 tire is no bueno.

  7. #7
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    One theory is that smaller tubes pinch less because they're less likely to bunch up. The other theory is the opposite.

    Ive always used the small 26 tubes... the 1.9-2.2 or similar. I dent rims before I pinch flat, some people seem to pinch no matter what, some trash rims before they pinch. I guess do what works for you.

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