Rolf Prima Tandem disc wheels
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Rolf Prima Tandem disc wheels
My question relates to the disc brake mounting system.
Because the 6-bolt rotor adapter is a thread-on piece, how can one be sure it won't get overtorqued, and thus strip the threads during hard braking?
Because the 6-bolt rotor adapter is a thread-on piece, how can one be sure it won't get overtorqued, and thus strip the threads during hard braking?
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Although I haven't asked, I strongly suspect basic engineering data regarding the load carrying capacity of different thread types and materials coupled with the vast history and experience gained with these thread-on drive-side cogs and freewheels -- to include the very high torque-generating touring-range freewheels -- was the basis for determining rear-wheel braking forces could also be handled by rear-wheel mounted thread-on drum brakes and disc rotors.
The bigger issue with these thread-on disc rotor adapters can be getting them back off if they are not installed using waterproof grease or anti-seize compound on the threads or routinely removed as part of a periodic maintenance regime.
Last edited by TandemGeek; 05-21-08 at 06:01 AM.
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Thanks for the insight, TG. I was wondering if any Rolf wheel owners had any issues with them.
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hi, We have been using a disc brake with our Rolf wheels with no trouble whats so ever, as far as braking. As already noted, the problem is trying to get it off. The hub recently broke at a spoke hole, and is now at Rolf to replace. The first thing I will do when it comes back will to put some anti-seize on the threads and get rid of the set screw.
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So there's a set screw? That's probably the mechanical means to keep it in place. I wonder if Rolf requires/recommends a specific type of Loctite to be used on those threads. How many miles do you have on those wheels, mikeybikey101?
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There is a set screw, but to me it is superfluous. It will just mash the fine threads, and make removal even harder. Believe me, you don't need loctite. You need anti-seize. This thing will lock up on its own. I had around 6600 miles before I sent it in. I didn't have an industrial vise mounted to a heavy bench, therefore my efforts to get it off with a large wrench were ineffectual. If my thinking is correct, applying the brake just makes this thing tighter.
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To get mine off I used a very large pipe wrench. I wrapped a several layers of rag around the adapter to keep the wrench's teeth from mauling it. I never did understand why there is a set screw.