Noob Question Regarding 650b Tires

Discuss light weight issues concerning mountain bikes & parts.

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Joined: Wed Mar 26, 2014 7:48 pm

by cannedheat

Will what appears to be more of a road tire, namely this Soma Fabrications B-Line 650bx38mm model, fit onto your typical 650b wheel set spec'd on a mountain bike? I suppose what I am really asking is, are all 650b rims the same in terms of tire fit, or are there road/cross-specific 650b rims that differ from mtb-specific rims in some way as to make road tires "unmountable"?

I'm looking for a pair of slicks or semi-slicks to mount on a Scott Scale 700 SL MTB. Also considering the Vee Rubber VRB-316 Speedster, which is a MTB-specific tire.

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by HillRPete

The B-Lines will fit your MTB rims just fine, there is only one 650B standard. I have them, and they are very flexible, with thin sidewalls and no puncture protection. The Speedsters are built more like a full MTB tyre from the looks of it, so chances are they don't roll quite as well, but I've never seen them in person.

by Weenie

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by AdyM

Quite of lot of the time people will specific the rim diameter, so 559 is the magic number for a 26, and 584 for a 650b, can't remember the 26er one though, 600 and something. Then everything should work out fine :) the main reason I find this useful is that a 29er mtb rim is the same size as a 700c road rim.

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by Jrock831 ... 56612e1282

Check the above link out... lighter than road tires... better protection too.: lightest mountain bike tires available
2004 trek carbon 9.8
2013 giant talon 29er
2001 mongoose XR-500

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by jooo

Grand Bois have a tyre that's lighter than the Maxxlite.

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