I have a 2015 Cannondale Supersix Evo. It has narrow chainstays limits my options for aero wheels. I've seen many threads/review with people reporting that their tires (usually 25 mm) rub up against the chainstays on the Supersix from 2013-2015. Currently I run Shimano C24 wheels (20.8 mm external rim width) and 25 mm tires on my 2015 Supersix and I've been fortunate enough to have no problems.

I would like very to much to buy some light aero wheels but these days it's nearly impossible to get anything -- at least from the brands I want -- narrower than 24 mm at the rim.

I'm willing to go down to narrower tires (23 mm) but I'm concerned that some of todays wheels might be so wide that my rims might even rub. I'm wondering how wide I can go. I'd like to hear anyone out there with practical experience with a 2013-2015 SuperSix Evo who has tried wide wheels. What rim widths gave you problems and how wide were you able to go?