terry_harris Posted December 15, 2010 Report Share Posted December 15, 2010 as above please i have tried a few different discs but doesnt seem to go sharp no matter how i hold the grinder. What discs do you use.?? Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted December 15, 2010 Report Share Posted December 15, 2010 Anything that's in the grinder, it's about technique mainly. Quote Link to comment Share on other sites More sharing options...
rupintart Posted December 15, 2010 Report Share Posted December 15, 2010 Press hard. Most of the time people's grinds aren't sharp because they pussyfoot with being scared to grind the shit out of the surface. Quote Link to comment Share on other sites More sharing options...
terry_harris Posted December 15, 2010 Author Report Share Posted December 15, 2010 ok this might sound stupid but could it not help doing it to fast Quote Link to comment Share on other sites More sharing options...
Sam T Posted December 15, 2010 Report Share Posted December 15, 2010 Press hard. Most of the time people's grinds aren't sharp because they pussyfoot with being scared to grind the shit out of the surface. This, but don't go stupid. Maybe try it out on an old BMX rim or something. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted December 15, 2010 Report Share Posted December 15, 2010 Well, sharp and deep are exclusive of each other. It ends up deeper if you push harder, but good technique gives a sharp grind. http://www.tartybikes.co.uk/media/guides/maintenance_rim_grinding/m2.html If your disc is a bit 'dull', give it a rub on some concrete to freshen it up. Quote Link to comment Share on other sites More sharing options...
forteh Posted December 15, 2010 Report Share Posted December 15, 2010 I dont apply any pressure at all and get a sharp grind every time, all pressing hard does is make the grind harsher. Ideally you should use a fresh disk with a sharp corner on it, this will give the sharpness, using a rounded off disk it will be a duller grind. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted December 15, 2010 Report Share Posted December 15, 2010 I dont apply any pressure at all and get a sharp grind every time Same - just the weight of the grinder (not even that!) will give a nice sharp grind. Quote Link to comment Share on other sites More sharing options...
forteh Posted December 15, 2010 Report Share Posted December 15, 2010 Same - just the weight of the grinder (not even that!) will give a nice sharp grind. Very shallow angle for a light grind aswell, bigman the brake nazi taught me Quote Link to comment Share on other sites More sharing options...
rupintart Posted December 16, 2010 Report Share Posted December 16, 2010 (edited) Same - just the weight of the grinder (not even that!) will give a nice sharp grind. I dunno, I did the whole pressing lightly thing, and the grinds although good, don't last long at all by comparison. You're completely right, they are exclusive of each other though, cause you can press hard and not get a "sharp" grind. In the end, I think people are just scared to really learn how to do it. It's not rocket science or even remotely complicated. I don't understand why people don't just try out a grinder on an old rim like suggested and find how it works to "perfect the technique" before moving on to a good rim. Surely a bike shop will GIVE a person a trashed wheel to practice on if they don't have one. Common sense seriously lacks sometimes. Edited December 16, 2010 by rupintart Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted December 16, 2010 Report Share Posted December 16, 2010 Yeh, a deeper grind always lasts longer - to the detriment of brake performance usually (depending on pads), from my experience. Quote Link to comment Share on other sites More sharing options...
rupintart Posted December 16, 2010 Report Share Posted December 16, 2010 Yeh, a deeper grind always lasts longer - to the detriment of brake performance usually (depending on pads), from my experience. What do you mean by "detriment of brake performance"? I use cousts and they work flawlessly with a deep, harsh grind. Well, they work good period, but best with a deep, harsh grind. Quote Link to comment Share on other sites More sharing options...
TrialsMan Dan Posted December 16, 2010 Report Share Posted December 16, 2010 Does it matter much about the direction of the grind (i.e. in relation to the direction the wheel will be spinning) or is it just pure technique? Quote Link to comment Share on other sites More sharing options...
isitafox Posted December 16, 2010 Report Share Posted December 16, 2010 You wanna get yourself one of these specialist trials grinding discs Terry http://cgi.ebay.co.uk/Trials-Diamond-Rim-Grinding-Disk-echo-gu-zoo-onza-/320629351834?pt=LH_DefaultDomain_3&hash=item4aa6ffa59a Quote Link to comment Share on other sites More sharing options...
terry_harris Posted December 17, 2010 Author Report Share Posted December 17, 2010 You wanna get yourself one of these specialist trials grinding discs Terry http://cgi.ebay.co.uk/Trials-Diamond-Rim-Grinding-Disk-echo-gu-zoo-onza-/320629351834?pt=LH_DefaultDomain_3&hash=item4aa6ffa59a surly you dont use them discs Quote Link to comment Share on other sites More sharing options...
Ben John - Hynes Posted December 17, 2010 Report Share Posted December 17, 2010 I used one before. Worked insanely well. Quote Link to comment Share on other sites More sharing options...
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