Originally Posted by
5fietsers
Hi, I'm new to this forum and thought that this might be a good place reach out with a tandem brake mounting question. We have a steel frame tandem that has a rear IS brake mount and a post mount TRP Spyre with an adapter and a 203 mm rotor which needs to be replaced. I'd like to upgrade to a 220 mm rotor, but I haven't been able to find an IS rear to 220 post mount adapter. Has anyone done this upgrade and/or found an adapter for this application?
Do you even know that you can fit a 220mm rotor in the rear of your bike? Plenty of bikes are limited in how big a rear rotor they can have. Just because 220mm rotors exist doesn't really mean that anyone needs them. I'm not gatekeeping, I'm trying to reality check you into reassessing the situation. Maybe save you some $$$. Never a bad thing.