27.5+ and 29er bikes

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This topic has 5 replies, 4 voices, and was last updated 8 years ago by scotroutes.

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27.5+ and 29er bikes
brassneck
Full Member

Am I right in thinking that providing the tyres fit through with to-my-mind-reasonable clearance, the sizes are close enough to use a 27.5+ wheelset on a 29er?

Idly thinking about trying a wheelset on my Whyte to see how semi skimmed might work for me… I suspect the clearance isn’t there anyway.

Posted 8 years ago

scotroutes
Full Member

Ish.

Expect a reduction in BB height. Just how much will depend on the overall diameters of the particular rim/tyre choices.

Posted 8 years ago

Sam
Full Member

depends on the 27+ tyre. There is a big difference between a 2.8 WTB and 3.25 Vee. Measuring your frame and comparing to published tyre widths should be pretty straightforward.

Posted 8 years ago

Fresh Goods Friday 700 - The censored edition

brassneck
Full Member

Yeah, thinking 2.8 will probably be as big as I’m likely to push it anyway, seriously doubt there’s room for much more than that. Ta chaps.

Posted 8 years ago

Mbnut
Free Member

To get at least an idea of whether a 650b+ will fit your frame measure the width of your chain stays and seat stays approximately 14/14.5” from the centre of your rear axle.

If you have 80mm then you will probably be fine with 2.8= tyres.

The same goes for your fork too.

This is an approximation but will give you an idea.

Posted 8 years ago

scotroutes
Full Member

If you were already running something like a 2.4 tyre then you’d definitely see a drop in BB height. At a guess, something in the order of 15-20mm?

Posted 8 years ago