Neon-trials Posted May 5, 2014 Report Share Posted May 5, 2014 Very odd. I'd say the rim is contaminated or the pads are dirty.Try re-grinding the rim, then rub it lightly with P240 paper or a wire brush, also rub the pads down ever so slightly using ~P400 paper. Make sure that the master cylinder isn't bottoming out although by the sound of things it isn't. I very recently went over from LGM's to ADM's and the brake performed poorly at first too but it has since become very powerful. Before this happened though I did end up grinding the rim again despite already having a fresh grind and did some work on the pad surface. And the prize for most useless post goes to.... Arrrr didums xBerk haha great word ! Quote Link to comment Share on other sites More sharing options...
SCOTTY___ Posted May 5, 2014 Author Report Share Posted May 5, 2014 Who's to say it's definitely going to solve his problem? Think outside the box you berk. What clamps are you using Craig? Magura clamps with metal washers! I shall try a fresh grind. Sadly I don't have a knackered metal cutting. But I have a stone version.. try That? When I had my first batch of ADM's they out performed my last set of pads. Cousts.. and yes the "real" ones. Heatsink yellows? Filth Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted May 5, 2014 Report Share Posted May 5, 2014 All grinding/cutting discs will perform pretty much the same, the key is to get rid of the sharp edge off a brand new disc, that's what digs into the rim and takes big gouges out of it. If you have any random old bits of concrete or metal you can happily chop into that should get the disc nice and blunt. Edit, if you mean you have a knackered stone cutting disc that will be perfect. Quote Link to comment Share on other sites More sharing options...
SCOTTY___ Posted May 5, 2014 Author Report Share Posted May 5, 2014 All grinding/cutting discs will perform pretty much the same, the key is to get rid of the sharp edge off a brand new disc, that's what digs into the rim and takes big gouges out of it. If you have any random old bits of concrete or metal you can happily chop into that should get the disc nice and blunt. Edit, if you mean you have a knackered stone cutting disc that will be perfect. That i do, Thanks for the advise! Quote Link to comment Share on other sites More sharing options...
SCOTTY___ Posted May 8, 2014 Author Report Share Posted May 8, 2014 All grinding/cutting discs will perform pretty much the same, the key is to get rid of the sharp edge off a brand new disc, that's what digs into the rim and takes big gouges out of it. If you have any random old bits of concrete or metal you can happily chop into that should get the disc nice and blunt. Edit, if you mean you have a knackered stone cutting disc that will be perfect. Tried a fresh grind. Small improvement... brake still slips through under pressure. Also no "honk" .. just a swoosh Quote Link to comment Share on other sites More sharing options...
*gentlydoesit Posted May 8, 2014 Report Share Posted May 8, 2014 Having the same problem with the black tnn's Dunno what happened. my front brake was truly the devils work last sunday, yesturday it was barely working Has to be a contaminant issue! Quote Link to comment Share on other sites More sharing options...
stirlingpowers Posted May 8, 2014 Report Share Posted May 8, 2014 (edited) Riding a similar configuration here. Radix, 2011 Magura including clamps. Had Heatsink Blue with Kabra/Bonz rims. They were really good in the dry. Tried to switch to TNN ADM for the last winter for wet rides: Just threw them on, and my brake performance was gone, no honk, no bite, no hold on the rear, some hold on the front. Switched back to Heatsink Blue, front was ok again, rear shit. Tried adjusting, tried grinding, different grinding discs, new rim, let others grind, nothing. Not with the original Heatsink Blues, not with the new ADMs. Bought a Because rim for the rear, which has parallel sidewalls. Also TNN clamps. Grinded with a very thin, new disk, barely touched the rim to give it the smoothest of grinds. Now the brake works with Heatsink Blue again, loudest ever, good bite, fair hold, even in the wet (!), for almost three weeks or 25 hours now (without sand or mud). I still have the TNN ADMs, and I will try them on the new rim with the TNN clamps, report back here. I came to the conclusion that I am just too stupid to properly align pads and rim with angled sidewalls and Magura clamps. Edited May 8, 2014 by stirlingpowers Quote Link to comment Share on other sites More sharing options...
FamilyBiker Posted May 8, 2014 Report Share Posted May 8, 2014 strange,i rode on my mates bike today to test some of the selfmade pads on the front,and he has black tnn on an echo rim on the rear. they were really good. nearly as good as the selfmade ones (joke) Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted May 8, 2014 Report Share Posted May 8, 2014 Tried a fresh grind. Small improvement... brake still slips through under pressure. Also no "honk" .. just a swoosh Much riding on them yet? Top surface will be a mess from the harsh grind and they'll need to bed in. Any pics of setup and grind? Quote Link to comment Share on other sites More sharing options...
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