• My polo bike has for the last four months had a 160mm rotor on the front... Now I look closly there's about enough room for 2cm more rotor! Might explain the disappointing stopping power I've had with the bb7! But actually there's a fair amount of pad contact so it's not dangerous, just lot less than optimal.

    Figured it was better to get a bigger rotor than different adapter, but if there's any advantage of 160 over 180 I'd like to hear it (other than tiny bit of weight saving)? I assume 180 for better stopping power?

    @moog I got a dremil clone off eBay for £20 from China, you can borrow it if you want... If you want to pick it up from polo?

  • You mean 1cm more rotor? Or is your adapter for 203mm rotors which might explain the 2cm gap?

  • That would be great, thanks. My new stem should arrive today so I'll let you know if I'll need it.

  • but if there's any advantage of 160 over 180 I'd like to hear it (other than tiny bit of weight saving)? I assume 180 for better stopping power?

    Lighter, less inclined to warp. Yes, 180 will stop you quicker.

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