As above not near a bike to try. Cheers
Bike Forum
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Will a front 180mm is brake mount just bolt onto the rear to run a 180 rear dis
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Posted 3 years ago #
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they are the same bolt pattern so it will fit to the frame (I currently have a front/rear combo bolted together in the spares box), but I think it may give a different rotor size.
someone on here the other day said it dropped the rwar rotor size by 20mm
Posted 3 years ago # -
Bugger thanks
Posted 3 years ago # -
Bugger thanks
Posted 3 years ago # -
Pretty sure they're different.
Posted 3 years ago # -
If you mean "will a 180mm IS caliper bolt onto the rear and also take a 180mm rotor" then the answer's no. With IS, the same caliper will take a 20mm smaller rotor if fitted to the rear than if it's fitted to the front.
You'd need to buy a +20 adaptor to get it to fit a 180 on the rear
http://www.chainreactioncycles.com/Models.aspx?ModelID=13736
Posted 3 years ago # -
I was offering a 180 IS Hope M4 front caliper only to a guy who wanted a 180 IS rear. All sorts of technical arguments followed, which left us both lost, so we didn't pursue the matter. Seemed to be something to do with the angle of fixing????
Posted 3 years ago # -
Well, really it's to do with the position of the mount on the frame/fork. A rear IS frame mount is closer to the dropout than the one on a fork.
Posted 3 years ago # -
Front 180mm IS = rear 160 IS
Posted 3 years ago # -
As above, 180mm IS front = rear 160 IS.
Its how you can run a 140mm rotor on the rear, but only as small as a 160mm on the frontPosted 3 years ago # -
front -20mm = rear.
ie. put that caliper on the rear and you'll need a 160mm rotor.
Posted 3 years ago # -
Cheers chaps
Posted 3 years ago # -
i tried to run a 180mm shimano mount on a hayes caliper.
should have worked.
both post mount to IS....
but it didnt like it, not one bit.Posted 3 years ago # -
Olly, thats nothing to do with rotor size. the reason it didnt work is hayes calipers are larger than shimano, so adaptors for shimano calipers arnt intetionally designed to accomodate the larger size caliper, tho it may work if your lucky with certain combinations of caliper and adaptor.
Posted 3 years ago #
Topic Closed
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