Bike Forums - rotor size for clydesdale

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rotor size for clydesdale

I am putting together a surly km rigid and trying to decide on rotor size. Me 6'5" 300lb so i was thinking a little bigger 185mm . My mtb know is a 96 trek 930 that i changed into a 69er.

I ordered some 185mm avid bb7

I think a bigger rotor would be good as it would heat up less on the steep descents.

Quote:

Originally Posted by bigpaul652002 (Post 10069674)

I am putting together a surly km rigid and trying to decide on rotor size. Me 6'5" 300lb so i was thinking a little bigger 185mm . My mtb know is a 96 trek 930 that i changed into a 69er.

I'd say one around 600mm but that's just me;) (For the measurement challenged that's a rim:rolleyes:).

For the front, go with a 203mm. You can probably get away with a 160mm in the rear.

Quote:

Originally Posted by bigpaul652002 (Post 10069674)

I am putting together a surly km rigid and trying to decide on rotor size. Me 6'5" 300lb so i was thinking a little bigger 185mm . My mtb know is a 96 trek 930 that i changed into a 69er.

If it were me, I'd probably go with a 185mm rotor. I've ridden both 203mm and 185mm rotors on the front and couldn't tell much of a difference. Then again, I'm relatively new to MTB riding so I'm not doing anything too crazy. If you decide to go with 203mm, be sure to check the specs on your fork and make sure it can handle the stress created by a large rotor; if you believe the manufacturers, not all of them can. Like cyccommute, I'd stick with a 160mm for the rear. For me, larger rear rotors just make it easier to accidentally lock the rear wheel ...