Decade Ago Posted August 1, 2012 Report Share Posted August 1, 2012 I'll give you the long version because I can't work out whats going on.... I bought an Inspired Element complete bike, changed a few things and was happy with the set up. The rear brake wasn't quite there so I fitted an Avid Ultimate (I prefer the feel of V's) with used coust pads from my old bike. The brakes were better but not great so I decided to grind my rear rim, first time I'd ever done it but I was pretty happy with the job. The grid was pretty harsh and deep, braking performance went through the floor! Oddly when i rolled the bike backwards it was perfect, alot of bite and it made that chirp that we all look for with a good grind. I decided to regrind the rim and fit some TNN pads, I used a stone cutting disc this time and the grind was alot lighter. I fitted the new pads and went for a ride, it was better than before but no where near as good as when the rim is rotating the other way! It makes that perfect chirp sound and has sooo much bite and hold in reverse. It makes no sense at all to me, can a grind be directional?! Help! This is costing me a fortune! Quote Link to comment Share on other sites More sharing options...
J.KYDD Posted August 1, 2012 Report Share Posted August 1, 2012 I always found this when running a rear V brake - its just the way it is Quote Link to comment Share on other sites More sharing options...
Jake. Posted August 1, 2012 Report Share Posted August 1, 2012 (edited) It's the same with my front magura, rear magura too. Grinds should be done in a clockwise direction for best performance. If it works good enough then don't worry about it, the way I see it is imagine you're pedalling up to rear, if it didn't hold as much with the wheel turning backwards you'd have a bad hold. Edit: And my front magura doesn't have a grind. Also I'm convinced that depending how long you have the grind, the little sharp bits slowly smoothen in the opposite direction to the brake (causing it to be a smooth surface), but there's still more of the grind the opposite braking direction. Bit confusing but imagine its usually like this \\\\\\\ and when you brake it digs into the pad. But after a while it'll slowly go /////// therefore it'll dig into the pad more the opposite way? Just a theory. Edited August 1, 2012 by JMCD Quote Link to comment Share on other sites More sharing options...
Decade Ago Posted August 1, 2012 Author Report Share Posted August 1, 2012 It's the same with my front magura, rear magura too. Grinds should be done in a clockwise direction for best performance. If it works good enough then don't worry about it, the way I see it is imagine you're pedalling up to rear, if it didn't hold as much with the wheel turning backwards you'd have a bad hold. Mine was anti-clockwise, will it make that much difference? Quote Link to comment Share on other sites More sharing options...
Jake. Posted August 1, 2012 Report Share Posted August 1, 2012 (edited) Hang on, I'm pretty sure it said on tarty rim grinding tutorial to do it clockwise... But having thought about it, anti clockwise sounds best as that's the direction the wheel moves forward. Basically on the driveside do it clockwise, other side do it anti clockwise. Make sense? Edited August 1, 2012 by JMCD Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted August 1, 2012 Report Share Posted August 1, 2012 Hang on, I'm pretty sure it said on tarty rim grinding tutorial to do it clockwise... Doesn't matter, since when you flip the wheel over you'll grind the 'other' way anyway. As for the original topic - that's normal for V brakes (and a good thing!). Quote Link to comment Share on other sites More sharing options...
Jake. Posted August 1, 2012 Report Share Posted August 1, 2012 Doesn't matter, since when you flip the wheel over you'll grind the 'other' way anyway. As for the original topic - that's normal for V brakes (and a good thing!). Yeah I realised that halfway through writing it out, it's best to grind in the direction the wheel will turn right? Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted August 1, 2012 Report Share Posted August 1, 2012 In my opinion, no, since you want the brake to work in both directions. When you flip the wheel over, if you use the same technique on both sides, the grind will run both ways. 1 Quote Link to comment Share on other sites More sharing options...
the mysterious leemur Posted August 1, 2012 Report Share Posted August 1, 2012 If it has more hold and bite in reverse would that not be better as it would give better hold on the edge on what ever you're on? Quote Link to comment Share on other sites More sharing options...
Decade Ago Posted August 1, 2012 Author Report Share Posted August 1, 2012 True but when you're on rails or doing large gaps you want confidence that your rear wheel won't slip forward sending you off the back. Quote Link to comment Share on other sites More sharing options...
dann2707 Posted August 1, 2012 Report Share Posted August 1, 2012 My front vee is just like that. Honky backwards but silent ish forwards. Thought that was just how it worked though. Quote Link to comment Share on other sites More sharing options...
Dave Anscombe Posted August 1, 2012 Report Share Posted August 1, 2012 (edited) my vees are deadly silent and i love them.il never go back to a magura <3 Edited August 1, 2012 by Dave Anscombe Quote Link to comment Share on other sites More sharing options...
Blake Posted August 1, 2012 Report Share Posted August 1, 2012 my vees are deadly silent and i love them.il never go back to a magura <3 I thought you stopped riding? Quote Link to comment Share on other sites More sharing options...
shercofray Posted August 4, 2012 Report Share Posted August 4, 2012 Will your grind wear in a forward direction and then still have a sharper grind in the other direction - giving the honk and bite when spinning the wheel the other way? Quote Link to comment Share on other sites More sharing options...
FamilyBiker Posted August 4, 2012 Report Share Posted August 4, 2012 on my bike thats the case... Quote Link to comment Share on other sites More sharing options...
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