Does anyone know how to measure an actual fender to figure out what size it is? I want to get the right width stays for it, since I don't have any hardware for the fenders currently. When I measure from outside to outside it comes out to 49mm, inside it comes out to 40. They are Velo Orange. thanks

Sounds like you have a 50mm fender, and I guess the 60mm stay is your best bet. Why don't you ask VO which is best fit.

When I installed mine, the stay bend did not exactly match the fender, so I had to bend them some to improve fit.

Every fender install is "custom" to some extent.

https://store.velo-orange.com/index.p...tays-pair.html