So I've picked up a nice Dawes Windsor touring bike with full 105 group. I was going to sell it but it all works so well, I think I might hang on to it! However, the wheels are 27" shod with Michelin World Tour tyres, which are very tight on mudguard clearance and rolling resistance is higher than I'd like. What are my options for something thin, light and fitting on 27" rims? Can I just fit a 700c and stretch it on?
I'm not massively fussed about period correctness (since if I keep it, I'll be fitting new levers and my modern drops) but the gumwall of the Michelins does look nice.
If anyone has something that fits the bill and wants to swap for the Michelins, that would be ideal!