Jamie_Trials Posted January 15, 2009 Report Share Posted January 15, 2009 (edited) does anybody grind there disc?just wondering if its a good ideamaybe with sandpaper so i dont make it too flimsy Edited January 15, 2009 by Jamie_Trials Quote Link to comment Share on other sites More sharing options...
Cookyboy Posted January 15, 2009 Report Share Posted January 15, 2009 wouldnt advise it Quote Link to comment Share on other sites More sharing options...
nemo_awp Posted January 15, 2009 Report Share Posted January 15, 2009 are you crazy,grind on disk Quote Link to comment Share on other sites More sharing options...
bigamac Posted January 15, 2009 Report Share Posted January 15, 2009 If you have a good setup then you wouldn't have to be so stupid! Quote Link to comment Share on other sites More sharing options...
Cookyboy Posted January 15, 2009 Report Share Posted January 15, 2009 Alternatively, try it and tell us how it goes? Quote Link to comment Share on other sites More sharing options...
Bigman Posted January 15, 2009 Report Share Posted January 15, 2009 It will not work, the whole idea of a disc brake is to have 2 smooth surfaces that cause high amounts of friction, causing the stopping power.....Adam Quote Link to comment Share on other sites More sharing options...
Jamie_Trials Posted January 15, 2009 Author Report Share Posted January 15, 2009 wouldnt advise itare you crazy,grind on disk If you have a good setup then you wouldn't have to be so stupid!i havent built the whole bike yet i was just wondering before i put it onso no It will not work, the whole idea of a disc brake is to have 2 smooth surfaces that cause high amounts of friction, causing the stopping power.....Adamoh right cheersi thought it might be abit like rims Quote Link to comment Share on other sites More sharing options...
psycholist Posted January 15, 2009 Report Share Posted January 15, 2009 A friend of mine sandblasted his disk to roughen it. Made the bite a little better for a few hours, then the pads polished it back to normal. Don't think overall power was improved at all though. Disks with bigger holes tend to have more bite and hold thanks to them allowing the brake pads to flex into the holes more when the brake is pulled if you're unhappy with the brake you have. Quote Link to comment Share on other sites More sharing options...
nemo_awp Posted January 16, 2009 Report Share Posted January 16, 2009 That idea was stupid,but i and my friends were thinkin about taking a tar on the disk but we decided that it would be very stupid idea and there is no point to take tar on the disk. :D Quote Link to comment Share on other sites More sharing options...
Muel Posted January 16, 2009 Report Share Posted January 16, 2009 I know someone who put tar on a front BB7, worked amazingly apparantly.Not to good when the rain came though I imagine. Quote Link to comment Share on other sites More sharing options...
Mr Motivator Posted January 16, 2009 Report Share Posted January 16, 2009 I know someone who put tar on a front BB7, worked amazingly apparantly.Not to good when the rain came though I imagine. And the BB7 wasn't amazing before?Someone obviously needs to take lessons in how to set up thier bike. Quote Link to comment Share on other sites More sharing options...
Adam-Griffin Posted January 16, 2009 Report Share Posted January 16, 2009 I know someone who put tar on a front BB7, worked amazingly apparantly.Not to good when the rain came though I imagine. Who was that ? Quote Link to comment Share on other sites More sharing options...
grant_hundley Posted January 16, 2009 Report Share Posted January 16, 2009 I know someone who put tar on a front BB7, worked amazingly apparantly.Not to good when the rain came though I imagine. I know someone who did it too.. The heat of the disc melted the tar into a sludgy mess = shite brake Quote Link to comment Share on other sites More sharing options...
Dan6061 Posted January 16, 2009 Report Share Posted January 16, 2009 I lightly sanded my disc once because i got some sticky crap on it, and the brake was terrible after! Had to ride around holding the brake on so it'd smooth the disc down again. Quote Link to comment Share on other sites More sharing options...
Henrik Y Posted January 16, 2009 Report Share Posted January 16, 2009 Tried it with an half crappy disk and will never do it again. It got so bad that a V-brake with rubber bands instead of wire would have been better.I grinded it with a angle grinder, and then I took a beltsander and got it smooth again and then I got some brake power back but it was wobbly and still crap. If you get something like oil, wax or something like that on the disk then burn it. And then use brake cleaner. Don't try to sand or polish it. I don't know how the larger holes affects the braking power but I think no holes at all and a smooth contact surface is the best for trials. Large holes are for cooling because a hot disk = less braking power. In trials you only use the brake for short and hard braking. But like downhill you brake for a long time and build up the heat and need more cooling so there you need more holes and even doubble walled disks with inside ventilation.I'm not a brake tech specialist but that's what I think based on my own experience. Quote Link to comment Share on other sites More sharing options...
nemo_awp Posted January 16, 2009 Report Share Posted January 16, 2009 ...If you get something like oil, wax or something like that on the disk then burn it. And then use brake cleaner. Don't try to sand or polish it...I'm not a brake tech specialist but that's what I think based on my own experience.or wipe it with napkin or rag,or clean it with some kind of alcohol Quote Link to comment Share on other sites More sharing options...
Henrik Y Posted January 16, 2009 Report Share Posted January 16, 2009 or wipe it with napkin or rag,or clean it with some kind of alcohol Forgot to mention about the pads. The disk may be easy just to wipe of but the pads isn't. You may have to run down a long slope with the brake hold in to get it up to heat and wear it off.But with heat you get full grip instantly afterwards. They don't have to glow, about 300°C is enough and stove works fine. Quote Link to comment Share on other sites More sharing options...
JackDolan Posted January 17, 2009 Report Share Posted January 17, 2009 bad bad bad bad bad! doesn't it bight enough already ?. Quote Link to comment Share on other sites More sharing options...
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