25 mm tyres

DB100

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.

yeachan153

If the original tubes fit the 23mm it will probably fit the 25mm's just fine

Herbsman

I used 18-23mm inner tubes in 25mm tyres, no problem.

markos1963

Herbsman wrote:

I used 18-23mm inner tubes in 25mm tyres, no problem.

+1 I even run them in 28mm tyres with no problems

DB100

Thanks for the replys,
Much appreciated.