My old Fox Float 26" was able to accommodate a 27.5 quite happily so now I'm wondering if the new Lyrik 27.5 I have will do the same for a 29er. There seems to be enough clearance using the tape measure and we don't really get really cloggy mud here so not really bothered about that.
So i just tested this for you and it is possible. But it is really tight. With a zip tied on fender it was rubbing on a 2.3 minion. Without a fender I would say it is safe to run a 2.3 but probably nothing bigger.
Clearance in the lowers don't tell you if the tire would hit the crown or not when bottoming out and that's the real problem. Let the air out and check and then take in consideration some flex. My bet is that it won't work.
austink is right, also fox forks typically have more tire clearance on the lowers compared to rockshox.
Thanks mate, much appreciated.
I'll try with someone else's wheel and with the fork deflated. I'm guessing if the arch clears, surely the crown would be designed to have the same, or slightly higher, clearance, no?