[Ratman]

I'm planning a 650B conversion using P35 rims and WTB Wolervine tires front and rear. I have the wheelset and I just ordered the tires today. My question is what tubes should I be using? I thought I saw somewhere that I could run a 26" tube and I also thought I saw actual 650B tubes for sale at some e-retailer but now I'm drawing a blank. I'm usually pretty good with the search feature but for some reason I'm getting everything but the info I'm looking for. Apologies in advance asking for a question I'm positive has been covered on this board already.

Thanks!

 

[Crawfishy]

Tubes

I have always run 26" tubes without a problem. I have heard that you can run a 26" tube on a 29" rim too. Hope that helps.

 

[Ciclistagonzo]

As Craw nentioned, 26" will work just fine, without the confines of a tire, a tube will stretch out, the tube wall will be a bit thinner, but minutely.

But, you are correct, Kenda, at least at one time did make a 27.5 tube, as I have a few of those.

 

[Cracked Headtube]

I use 26" tubes designed for a larger 2.3" width. Zero problems. zero.
@Craw, yes I've used a 26" tube in a 29" tire....I flatted on the trail on a 9r and didn't realize I packed 26" tubes.

 

[Ratman]

Thanks guys!! That's good intel especially since I keep a supply of 26" tubes on hand at all times....