So measure the clearance round the current tyre and despite what the smallest clearance you are happy with, don't forget that some tyres are bigger than others for the same nominal size.
Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.
Cheers, I looked at that but wasn't sure as sizes vary between manufacturers, just wondered if there is a max that people commonly fit that is known to work without worrying about it not fitting.
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