I’ve read a lot of discussion saying that a larger tyre is more comfortable on a commute.I wonder what size of larger tyre will a triban 3 take (with crudds 2) thanks

25c on mine (a red 3) and at the front that’s about all that will fit (the brake is the limiting factor).

You may possibly get away with bigger on the back (the rear brake is higher up).

Btw lots of good info over on the Triban Owners Forum.

The problem is not so much the width of the tyre as the depth – a deep profile tyre comes up against the chainstay brace and prevents the wheel from going far enough forward for the QR to clear the derailleur hanger, so that removing and refitting the back wheel becomes a real struggle. Removing the QR or unscrewing it a long way helps.

Good point from globalti.

But I’ve just noticed this:

(with crudds 2)

You’ll not get cruds2 AND 25 on the front. You might get them in there with a 23 but it will be really close: possibly even risky.

Thanks for the info.
I may get them and take the cruds off.
Looking forward to checking out the triban forum as well.