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hippy
Will 28mm tyres wind up being 'narrower' than 25mm tyres on a 27.5mm ext rim because less light bulb shape? Wider/narrower/the same? I'm getting a tiny bit of wheel rub when the rim flexes under load - so if I can shave a mm or two it would be useful. I know different tyres come up with more difference than that anyway so if I'm on a hiding to nowhere that's fine.