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Discussion Starter · #1 ·
I was at my local bike co-op last night and saw they had a wheel-set that had 29x2.1 written on tire, but on the rim on both sides said 650b. How is that possible? One of the co-op people said it's a 650b tire they are calling 29er, but is that even a thing? It was a front tire that had the disc brake already on. I was tempting to try it out on my bike build, but since sizing was questionable I did not.
 

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I was at my local bike co-op last night and saw they had a wheel-set that had 29x2.1 written on tire, but on the rim on both sides said 650b. How is that possible? One of the co-op people said it's a 650b tire they are calling 29er, but is that even a thing? It was a front tire that had the disc brake already on. I was tempting to try it out on my bike build, but since sizing was questionable I did not.
Was the not hand written by a human that maybe didn't know it was a 29er tire becuase they uhh.....didn't read it?

The factory rim stickers would likely be accurate.

But instead of trusting a note on a tire or a sticker on the rim, maybe read the tire size imprinted on the tire.

Or if that doesn't work, measure the rim. 650b and 29er rims aren't the same size -a tape measure should be helpful.
 

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Discussion Starter · #5 ·
Was the not hand written by a human that maybe didn't know it was a 29er tire becuase they uhh.....didn't read it?

The factory rim stickers would likely be accurate.

But instead of trusting a note on a tire or a sticker on the rim, maybe read the tire size imprinted on the tire.

Or if that doesn't work, measure the rim. 650b and 29er rims aren't the same size -a tape measure should be helpful.
Imprint on tire said 29x2.1.
 
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