Regarding the question
I do have to ask though - if you're riding on chipseal and only can fit 25's...are you on the right bike for your road conditions? You'd feel better on 28 Fintstones than on 23 Conti's.
Part of the reason for asking this question is to trade off the fact that there is a 'bike solution' to this problem. I just want to know how far I can go with what I've got before making that decision. FWIW, maybe 20% of my riding is chipseal (would probably be a bit more if it were more comfortable).
Thanks.
dave