For example: disc on rear and rim on front. I realise this would require a unique set up including: a) a bike with disc compatible rear and rim compatibilie fork, b) two unique wheels, c) perhaps two separate levers. And d) the 'feel' of the braking would also probably be different. But, unless I am missing something here, it would seem to be a good compromise:
The front wouldn't look so ugly, nor would there be a sacrifice in aerodynamics. It would also be lighter. The back already has the cassette, so the disc 'blends in' so to speak, and there's probably little to no aero penalty. Yet it would give extra/safer stopping power on the steeps when using carbon wheels.
Given what I've already mentioned, what would be other pros and cons (or impractical/impossibilities) to such a set up?
Though seriously, I don't really see the point. Aside from looking weird, all the mis-matched parts you're going to end up with and the effort required just doesn't seem worth it.
The question would be the value of doing it. If you want disc brake because of the safety concern with carbon rim braking, you better go full disc brake rather than buying a disc brake fork.
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A fix would be to get a disc brake fork and do a mechanical setup. That way I don't have to worry so much while descending.
On a motorcycle they say braking performance is like 90/10 front/back. On a bike its more even but the front wheel is going to take up most of it.
Doing it on the rear sounds like a backward idea to me though. You're trying to improve a place where braking is already limited.
alcatraz wrote:Doing it on the rear sounds like a backward idea to me though. You're trying to improve a place where braking is already limited.
1. you have carbon rear wheel, and
2. you ride in wet days (or it suddenly rains and you keep riding)
it hurts to brake with rim brake when it's wet... the dirt paste accumulated on the pads will be like sand paper scratching your precious rim...
Nope, bad compromise, disc should be on the front where ~75% of the braking load can be applied. Disc on the rear is only any good for specific types of bike. i.e. bikes with no facility for a front brake (jump bikes?) or possibly delivery bikes, or those towing trailers or significant loads over the rear wheel.MiddMan wrote:But, unless I am missing something here, it would seem to be a good compromise:
On the steeps you'd get even less braking as the weight shift to the front wheel would be greater and quicker. As you will already be shifted slightly forwardsMiddMan wrote:Yet it would give extra/safer stopping power on the steeps when using carbon wheels.
Cons 1) Not able to stop effectively. 2) Have to replace your frame (expensive)MiddMan wrote:Given what I've already mentioned, what would be other pros and cons (or impractical/impossibilities) to such a set up?
Pros 1) can do massive skids
Just buy a new fork and stick a disk on the front. Pretty sure you can still get disc hubs with rim brake rims. So you can even use the same wheels.
My wifes MTB was set up like this for ~10 years. BB5 on the front XTR V on the back some mavic Cross ride wheels. The wheels were still in very good condition (rear really doesn't get much wear unless you ride in *really* crap conditions and never clean the pads/rims.)
Most road frames come with no disc mounts, so this is an easy way to get good commuter/wet weather performance without splashing out on a new frame. Should cost around €300 for mech discs and "commuter" level kit (road)glam2deaf wrote:Though seriously, I don't really see the point. Aside from looking weird, all the mis-matched parts you're going to end up with and the effort required just doesn't seem worth it.
http://www.kinesisbikes.co.uk/Catalogue ... ht/4S-DISC
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However one wheel mismatch I'm surprised I've never seen is a front carbon wheel with an aluminium brake track in the front and a full carbon wheel in the rear. I've always thought that combination would give be a good compromise between braking performance, safety and weight. Now I'm thinking that I need to build such a front wheel for my road bike...
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