Lightweight touring on Giant SCR4

[Janeyb]

I'm doing the Way I the Roses in June. Going lightweight - b n b so just a spare pair of bibs, jersey, lightweight trousers for evening, couple of t-shirts and a pair of sandals. Shouldn't amount to much weight. Doing it on my Giant which is proving to be a bit of a workhorse. I cant afford to think about buying a tourer until i know i like touring. Thinking of changing rear tyre - Got 25s on at the moment but thinking of sticking a 28 on the back. Worth it?

 

[the snail]

I wouldn't bother, but why not try a test ride with your luggage and see how it goes?

 

[Titanium]

If you're not fully laden with heavy pannier bags then 25's should be OK. Actually if it was me, I'd choose 28's or 32's but then I like them anyway for a bit more cushioning.
Maybe the best compromise would be to buy a folding spare like a 700x28, and include that in your 'luggage'.