Merida002 Posted June 13, 2008 Posted June 13, 2008 Hi All, I am thinking about changing the rear brake on my Merida from a V brake to a disc brake is this an easy upgrade and what sort of price am I looking at? I am thinking of getting Deore XT to match the rest of the specs.
GIRR Posted June 13, 2008 Posted June 13, 2008 Im taking a guess of a price around R2.5K for reasonable disk brakes, the problem is can your hubs fit disk rotors... if you have to get new hubs or wheel set then its going to be a bit more expensive.
mtbfreak Posted June 13, 2008 Posted June 13, 2008 only the rear?Juicy 3 approx R1200,Hub? approx R500Labour approx R250. xt will most likely be a bit more...
GIRR Posted June 13, 2008 Posted June 13, 2008 I thought nearly all disk brakes where sold in pairs, not sure how you are going to source only a rear one...
mtbfreak Posted June 13, 2008 Posted June 13, 2008 only the rear?Juicy 3 approx R1200,Hub? approx R500Labour approx R250. xt will most likely be a bit more...
shaunh Posted June 13, 2008 Posted June 13, 2008 Brakes are sold as either pairs, front only or rear only. Check totalcycling or CRC.
GIRR Posted June 13, 2008 Posted June 13, 2008 I thought nearly all disk brakes where sold in pairs, not sure how you are going to source only a rear one...
NC_lurker Posted June 13, 2008 Posted June 13, 2008 Why the rear one? If you're only going to change one, rather convert the front wheel.At least 60% of your braking should be done via the front wheel, not back wheel.
Hog_ Posted June 13, 2008 Posted June 13, 2008 Only the rear?? Wouldn't it be better to have a disc in the front if you can only do one side?
GIRR Posted June 13, 2008 Posted June 13, 2008 I thought nearly all disk brakes where sold in pairs, not sure how you are going to source only a rear one... sorry dont know why its double posting and i cant seem to delete themGIRR2008-06-13 03:01:47
mtbfreak Posted June 13, 2008 Posted June 13, 2008 nope, one can get only front or only rear....I'd change them both though...
Merida002 Posted June 13, 2008 Author Posted June 13, 2008 Dulicate deleted.Merida0022008-06-13 03:22:22
Merida002 Posted June 13, 2008 Author Posted June 13, 2008 Thank all for the responses. Hog and lurker, the reason for the rear only is because I am a little heavier than most (OK a lot..) and am quite happy with the stopping power of the front brakes but feel that I could do with a lot more from the rear brakes and hence the best way to do that I thought would be to upgrade to a disc brake on the rear.
Merida002 Posted June 13, 2008 Author Posted June 13, 2008 Sorry don't know why but when I tried to post the response it timed out so I reposted another one (which also timed out) but both seem to have posted regardless of the time out.
Johan Bornman Posted June 14, 2008 Posted June 14, 2008 Thank all for the responses. Hog and lurker' date=' the reason for the rear only is because I am a little heavier than most (OK a lot..) and am quite happy with the stopping power of the front brakes but feel that I could do with a lot more from the rear brakes and hence the best way to do that I thought would be to upgrade to a disc brake on the rear.[/quote'] You are swapping brakes for the wrong reasons. A rear brake on a bicycle or motorbike does very little for stopping. About 85% of your decelleration force is generated by the front brake. The reason for this huge disparity is traction. As you brake, your weight is transferred to the front of the bike and the front wheel bites in. The rear lifts slightly (or completely) and very little downforce remains during braking, hence the propensity to skid. A skilled road rider almost never uses his/her rear brake and a skilled MTB rider only uses the rear brake where traction is a problem, such as in gravels-strewn corners. On a road bike, you can do an endo on the front wheel, it'll never skid on dry tar. The rear, under the same circumstances skids very, very easily with no effect on your speed at all. In fact, the limiting factor here is not traction, but overturning momentum. You'll to an arse over head long before the wheel will skid. Therefore, a rear brake is of very little value and upgrading it is a senseless exercise. It won't stop you any better. I bet you can already skid the rear wheel. A better brake won't skid it more. If you're experiencing braking problems, you need to work on your technique. Never, ever drag your rear brake on the trail. The fact that 99% of racers do this doesn't make it right. It takes a lot of skill to perform a perfect emergency stop and it is something that should be practiced on both dirt and tar. The best way to start is to move the front brake to your strongest and cleverest hand - the right, for most of us. Then start getting used to braking with the front only. After that, get used to lifting your rear wheel just-just off the ground. This is the maximum decelleration position, since you're just at the point before doing an endo and in the position where the front brake is doing all the work. A rear wheel that skids makes the bike fishtail and gets you into trouble. That's why an emergency stop should not involve the rear brake, you need that wheel on the ground for steering. If you're perfectly in control you will allow the rear wheel to lift slightly.
123qwer Posted June 14, 2008 Posted June 14, 2008 Avid juicy 3 is wot I hav on my bike and i think that they are awsome
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