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Rear Disc Brake rotor clearence question...

615 Views 5 Replies 3 Participants Last post by hord, Jul 19, 2004

hord

Discussion Starter · Jul 17, 2004

Hi Guys & Girls,

I am researching into upgrading to Avid Mechs on my KHS ALITE framed bike - Its a real 'bittsa' at the moment and the V-Brakes just aren't pulling me up! Anyway I was wondering if anyone knew the rotor size limits on the 2004 frames or even could give me some dimensions of where the rotors go in relation to the end of the hub.

The reason I ask is because I still have non-disc hubs, and so I can't even work out where the rotor would sit! I am really keen on getting the 203mm rotor versions (lazy braking sounds fun! - plus I am hauling weight at the moment) which could push the frame clearance! The Front shock is a 2003 Duke SL so that shouldn't have any dramas clearance wise!

I have also email KHS to ask the same question - but they are a bit sloooooow in replys!

Taa very much!!

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damion

· #2 · Jul 17, 2004

Bad idea.

hord said:
Hi Guys & Girls,

I am researching into upgrading to Avid Mechs on my KHS ALITE framed bike - Its a real 'bittsa' at the moment and the V-Brakes just aren't pulling me up! Anyway I was wondering if anyone knew the rotor size limits on the 2004 frames or even could give me some dimensions of where the rotors go in relation to the end of the hub.

The reason I ask is because I still have non-disc hubs, and so I can't even work out where the rotor would sit! I am really keen on getting the 203mm rotor versions (lazy braking sounds fun! - plus I am hauling weight at the moment) which could push the frame clearance! The Front shock is a 2003 Duke SL so that shouldn't have any dramas clearance wise!

I have also email KHS to ask the same question - but they are a bit sloooooow in replys!

Taa very much!!

In my opoinion, the Duke is not intended for use with an 8" rotor.

Seeing as how most of the power is up front, go with a 6" rotor in the rear anyways.

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hord

Discussion Starter · #3 · Jul 17, 2004

Cheers Damion - thats the sort of feedback I am after! So you reakon a better combination for the Duke/bike would be a 185mm on the front and a 165mm on the rear? Currently I weigh in at around 195lb - so would that combo have the power for steep hills?

Thanks again for you guys feedback & Help

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damion

· #4 · Jul 18, 2004

Perhaps.

hord said:
Cheers Damion - thats the sort of feedback I am after! So you reakon a better combination for the Duke/bike would be a 185mm on the front and a 165mm on the rear? Currently I weigh in at around 195lb - so would that combo have the power for steep hills?

Thanks again for you guys feedback & Help

I am not sure that the Duke is rated for a 185, but I'd not worry about that one.

If you want more power, spend the extra $ on Hyro brakes. (you are thinking Avids, right?)

If you are going Avid, go ahead and match the front and rear at 185.

Personally, I am on Hayes Mag's, weigh 225lb, ride all year around (in Alaska) and have been on the same brakes for 4 years now.

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Speedub.Nate

· #5 · Jul 18, 2004

Hord,

Even in the 240 lb range a year or so ago, the 185F/165R Avid combo prooved more than capable enough to get the stopping job done. In fact, I was perfectly happy with a 185F/V-brake rear combo that I rode for a few years before adding an Avid rear.

I wouldn't hesitate to run a 185 on a Duke, and while I wouldn't exactly call a 185 rotor "overkill" in the rear, I appreciate the extra modulation the 160 provides on this wheel that's all to easy to lock up.

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hord

Discussion Starter · #6 · Jul 19, 2004

Speedüb Nate said:
Hord,

Even in the 240 lb range a year or so ago, the 185F/165R Avid combo prooved more than capable enough to get the stopping job done. In fact, I was perfectly happy with a 185F/V-brake rear combo that I rode for a few years before adding an Avid rear.

I wouldn't hesitate to run a 185 on a Duke, and while I wouldn't exactly call a 185 rotor "overkill" in the rear, I appreciate the extra modulation the 160 provides on this wheel that's all to easy to lock up.

Hi Guys,
Thanks for the feedback! I can realate to 'underpowering' the rear as the V-brake at the moment can lock up the rear with minimal effort! So I think I shall start collecting bits & pieces for the conversion - and will run with the 185F/165R combo avids. Hydros look awesome but the costs involved (I have integrated LX shifters/brakes) start to blow out the budget in a big way! Thanks again for your help & real life experiences!!

Now to rob a bank....

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