1) If you can't find anything thight enough at the ankles, I think you are aiming for the wrong look :) Roll up or stuff-in-sock to avoid wiping the chain when riding.
2) If I had problems with crotchal failures, I'd get some sturdier jeans and have them reinforced from the beginning. Add a yoke to the inside and they should last twice as long. Or add yokes inside and outside and change them when they wear out.
two things:
1) If you can't find anything thight enough at the ankles, I think you are aiming for the wrong look :) Roll up or stuff-in-sock to avoid wiping the chain when riding.
2) If I had problems with crotchal failures, I'd get some sturdier jeans and have them reinforced from the beginning. Add a yoke to the inside and they should last twice as long. Or add yokes inside and outside and change them when they wear out.