Forum home Road cycling forum Road general

25 mm tyres

DB100DB100 Posts: 258
edited June 2012 in Road general
Hi All,
I have just bought some 25mm Continental GP4000s tyres for my Trek Madone.
Do you have to change the inner tube from the original, I have only ridden the bike once?
Sorry if it seems a silly question. It came with 23mm tyres, standard rubbish ones. :D

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