I've seen a deal on pair of Rockshox forks for 27.5" wheel. Rockshox say the maximum tyre size is 710mm. My tyre is 718mm. That's only 4mm extra radius, can I get away with it? I assume that the specified 710mm allows for a reasonable clearance? Anyone know what this clearance is? Or could someone please measure for me their tyre diameter and the clearance that gives them.
Thanks
My tyre is about 710 diameter, I don't think I'd want to go much bigger. I think a 718 might fit but there would be almost no clearance.
I’m running a 2.8 vigilante on a Recon, and a mud guard thing. Still enough clearance. I’ll go and measure shortly.
You'll be reet. Just measured, and my tyre is at least 720mm diam (measured conservatively.). Also Measured axle to underside of fork arch and that is at least 340mm, so in theory you could run up to 740mm.
For info, that's a 2.8 WTB vigilante on Sonder alpha 27.5 rims on a Recon 27.5 fork. Even with a mud guard (one of the simple plastic things you bend and zip-tie) I can get a clear finger between tread and mudguard.
That's weird that you've got loads of clearance but thols2 doesn't.
Are your forks 27.5 boost?
Are your forks 27.5 boost?
Yes.
Sorry, glaring typo in my original reply:
and that is at least 340mm, so in theory you could run up to 740mm.
That should of course have read 370mm radius, and thus 740mm clearance.
It's probably a good idea if the OP specifies exactly which fork he's looking at. The Boost forks are listed as taking an 81 mm tyre, the non-Boost a 62 mm tyre. That's a massive difference, 3.2" versus 2.4".
Good point. It's a 9mm QR, so non-boost.
I guess yours are non-boost? So it looks like 710mm really is the limit for the non-boost 27.5" forks. I'll have to look for something else.
Thanks for your help.
Mine are non-boost (15 x 100) Revelations with 32 mm stanchions. They're a few years old, but they're basically a beefier Reba. They seem to be ok up to about a 2.4" tyre but I don't think you'd get a 720 mm diameter wheel in there with enough clearance to want to ride offroad.