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Rear brake disc sizing query

swod1swod1 Posts: 1,639
edited October 2016 in MTB workshop & tech
I've had my mega tr built up now for a couple of months and its great however the rear brake has been annoying me for a while now turns out the rotor is warped and is rubbing the pads no matter how many times I adjust the caliper.

So I'm looking at new disc rotors and would I see any benefit from fitting a 180mm on the rear?

I just transferred over parts from my hard tail which used 160mm on both front and rear. I've seen a big improvement with fitting a 180 on the front but now just wonder if there is any benefit to a bigger disc on the back.

I know downhillers use 203 front and back but I'm not doing that so still wonder if 160 rear is enough, what do you guys use on your trail bikes?


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