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Disc Compatible Hubs
I've ordered a bike without disc brakes (forks are disc compatible), gonna
come tomorrow. What I want to know is it possible to use disc brakes by simply replacing out the old hub with a disc hub? I realise the wheels will have to be re-built, will a LBS do this for me and how much is it likely to cost? Ta very much. -- Burning_Ranger To email: |
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Disc Compatible Hubs
Burning_Ranger wrote: I've ordered a bike without disc brakes (forks are disc compatible), gonna come tomorrow. What I want to know is it possible to use disc brakes by simply replacing out the old hub with a disc hub? I realise the wheels will have to be re-built, will a LBS do this for me and how much is it likely to cost? Do you *need* disc brakes? My understanding is that because the front wheel needs to be dished for the disc to fit, it's not as strong. |
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Disc Compatible Hubs
"Burning_Ranger" wrote in message ... Perhaps I wasn't clear; What I'm asking is can you re-use the old spokes and rims with the newly bought disc hub? You can use the old rims, obviously make sure the spoke count is the same (usually 32 for XC 36 for DH or heavier folks). It's unlikely you'll be able to use all the spokes, if any, as the spoke flanges of disc hub can be of different diameters on each side so at best only half will fit. As Jon Senior has said one way to save money is to re-build the wheels yourself, not that difficult just requiring time and patience. http://www.dtswiss.com/index.asp?fus...ews.bike&id=31 www.hopetech.com http://www.sheldonbrown.com/wheelbuild.html http://www.parktool.com/repair_help/howfix_truing.shtml Regards, Pete |
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Disc Compatible Hubs
Jon Senior wrote:
Simple test. Ride bike on whatever surface you'll normally be cycling. Wear a stack of protective clothing (Dress like the Michelin Man). Attempt to lock wheels. If you can, then you have little need for stronger brakes. The only other reason I can think of is for circumstances where there will be prolonged braking which might put the tyre at risk of overheating (Alpine descent?). The reason for disc brakes is not stopping power - any decent brake will lock the wheels especially on loose surfaces. Its the control of that power - the so called modulation - which is a lot lot better on good discs than any rim brake plus the relative immunity from mud and wet. Tony |
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Disc Compatible Hubs
in message ,
Burning_Ranger ') wrote: I've ordered a bike without disc brakes (forks are disc compatible), gonna come tomorrow. What I want to know is it possible to use disc brakes by simply replacing out the old hub with a disc hub? Yes. I realise the wheels will have to be re-built, will a LBS do this for me and how much is it likely to cost? With a bit of patience and care you can easily rebuild your wheels yourself. The only tool you need is a spoke key. Instructions he URL:http://www.sheldonbrown.com/wheelbuild.html A wheel takes around about an hour to build for someone who knows what they are doing, so expect to pay whatever your LBS charges for an hour's workshop time. Up to £30 per wheel is reasonable. Of course, if your new hubs have a different diameter to your old ones you will need new spokes as well. There's a spoke length calculator he URL:http://www.sheldonbrown.com/rinard/spocalc.htm (get the full version, not the 'express' one). -- (Simon Brooke) http://www.jasmine.org.uk/~simon/ ;; MS Windows: A thirty-two bit extension ... to a sixteen bit ;; patch to an eight bit operating system originally coded for a ;; four bit microprocessor and sold by a two-bit company that ;; can't stand one bit of competition -- anonymous |
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in message , Tony Raven
') wrote: Jon Senior wrote: Simple test. Ride bike on whatever surface you'll normally be cycling. Wear a stack of protective clothing (Dress like the Michelin Man). Attempt to lock wheels. If you can, then you have little need for stronger brakes. The only other reason I can think of is for circumstances where there will be prolonged braking which might put the tyre at risk of overheating (Alpine descent?). The reason for disc brakes is not stopping power - any decent brake will lock the wheels especially on loose surfaces. Its the control of that power - the so called modulation - which is a lot lot better on good discs than any rim brake plus the relative immunity from mud and wet. I think this is also a matter of hydraulic versus cable. Cable operated brakes suffer from more hysteresis and drag in the system, which hampers modulation. So in my opinion and experience it is hydraulic brakes (irrespective of rim or disk) which offer better modulation, and disk brakes (irrespective of cable or hydraulic) which offer relative immunity to mud and wet. Obviously, with hydraulic disk brakes you get better modulation _and_ better wet weather performance, but at a cost in weight and relative lateral weakness of the wheel (and also, of course, loadsamoney). -- (Simon Brooke) http://www.jasmine.org.uk/~simon/ to err is human, to lisp divine ;; attributed to Kim Philby, oddly enough. |
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Disc Compatible Hubs
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