Upgrading rotors to 180mm, tell me about adapters.

[Minstadave]

I changed my brakes today from the stock MT410 Shimanos to a set of TRP Slate Evos I got cheap a year or so ago.

I'd like to change my rear rotor to 180mm from 160mm so I can use 2.2mm rotors I'm meant to with the TRPs.

How do you figure out what size adaptor to use is it simply take the original rotor size and add the extra mm to get the new size? They came with adapters that say +23mm on them which I didn't need when fitting. Will they do the job? Or do I need +20mm post mount adaptors.

 

[Minstadave]

I didn't check but got lucky and they do fit, it was tight and needed to sand a tiny bit off the PM adaptor at the rear. Messed shortening the hoses a bit bit got there in the end.

 

[Minstadave]

Nice one. It's not something I ever thought of until I fitted them and realised!

Yeah I messed up multiple times and learnt a lot.

The post mount adaptor had up and an arrow, mounted it as suggested, couldn't get the rear wheel back on. Switched it round and it was perfect.

Shortened the hose three times on the front, first time forgot the compression nut, second time forgot the bloody plastic cover. Not much slack left on that line!

Back brake still feels slightly more spongey then the right, think there's still some stubborn air in the caliper.