Differences betweek Trek FX Bikes

[Catrin]

Yep, it should be fine. My SO & I ride our road bikes (compete with skinny 23mm tires!) on a canal towpath sometimes (when visiting the Chicago burbs). It's crushed limestone, and it's about the limit for how rough a surface I'd happily ride with those tires. An FX (even the 7.6) would be super easy for us there.

Thanks for your experience with this. What is the main difference between the 7.5 and 7.6? Weight?