echo_rob Posted February 1, 2008 Report Share Posted February 1, 2008 hey there,I'm looking in to grinding my rear rim. I usually run smooth with tar and plazzys but I'm thinking if it would be good with a nice sharp grind.But the only problem with grinds I seem to find, is that the grind goes dead after about 3 weeks, and then your brake is worse than ever before! (in my experience)Then you try and tar it and the tar simply goes into the cracks in the dead grind and creates a sheen of smooth tar, so your brake is even worse!!!It may possibly be the grinder and disk I used???I dont know so any help would be appreciated thanksrob Quote Link to comment Share on other sites More sharing options...
python_man Posted February 1, 2008 Report Share Posted February 1, 2008 (edited) use the search might give you some tips that may helphttp://www.trials-forum.co.uk/wiki/How_to_grind_a_rim Edited February 1, 2008 by python_man Quote Link to comment Share on other sites More sharing options...
Ben John-Hynes Posted February 1, 2008 Report Share Posted February 1, 2008 (edited) it depends on what rim you have too!some hold grinds better than others!may also be the grinder, as you said!EDIT: do you know for a fact taht you're doing it right? Edited February 1, 2008 by Benjaminge Quote Link to comment Share on other sites More sharing options...
Bobby Fox Posted February 1, 2008 Report Share Posted February 1, 2008 I like to run a sharp light grind on my echo 07 rear rim, im using ZOO! pads and it works mint, but got the same problem as you i have to re-new my grind monthly. Certain rim alloys are softer than others and obviously pad compounds are different too some designed to be used with SMOOTH rims. The only way to increase grind life in my opinion is to make a harsher grind, experiment with rim and pad combinations and make sure you are using the correct grinding disk one that doesnt just scratch the surface of the rim but cuts into it, also the angle at which you hold the disk against the alloy can increase the sharpness or flatness of the grind. Hope this helps. Quote Link to comment Share on other sites More sharing options...
Danny Kearns Posted February 1, 2008 Report Share Posted February 1, 2008 Zoo pads on any form of grind are people going mad ?Zoo pads love smooth rims. But, I don't really go for sharpness, i just grind the shit outta it so it's mega deep, mega sharp and mega harsh. My brake always works Danny. Quote Link to comment Share on other sites More sharing options...
Bobby Fox Posted February 1, 2008 Report Share Posted February 1, 2008 Zoo pads on any form of grind are people going mad ?Zoo pads love smooth rims. But, I don't really go for sharpness, i just grind the shit outta it so it's mega deep, mega sharp and mega harsh. My brake always works Danny.I thought they were ok on a smooth rim but finding them way better on a light grind, yea i know they will get eaten alive in a few rides but oh well. Quote Link to comment Share on other sites More sharing options...
Henrik Y Posted February 1, 2008 Report Share Posted February 1, 2008 http://www.trials-forum.co.uk/forum/index....showtopic=54678Check my post in that thread for a little different type of grinding. Quote Link to comment Share on other sites More sharing options...
Muel Posted February 1, 2008 Report Share Posted February 1, 2008 Rock pads with a medium grind, it's the best maggy I have ever had, but it's still nothing on my disc.I'd be getting some necopads if Iwas sticking with it, but hopefully my EMA bonus will appear next week, then I can afford an 08 frame.Someone buy my spare bike! Quote Link to comment Share on other sites More sharing options...
echo_rob Posted February 1, 2008 Author Report Share Posted February 1, 2008 I'm using standard onza rim, but I may change to one of those neon rims! thanksrob Quote Link to comment Share on other sites More sharing options...
echo_rob Posted February 4, 2008 Author Report Share Posted February 4, 2008 well just ground me rim and the back brake is not amazing. used a metal cutting disk and the grind was quite savage but its still shit.any help?thanksrob Quote Link to comment Share on other sites More sharing options...
Matthew_Gibson Posted February 4, 2008 Report Share Posted February 4, 2008 Pads set up correct? pads clean? Bleed okay? Booster? Quote Link to comment Share on other sites More sharing options...
echo_rob Posted February 4, 2008 Author Report Share Posted February 4, 2008 what disk is the best to use?thanks rob Quote Link to comment Share on other sites More sharing options...
Matthew_Gibson Posted February 4, 2008 Report Share Posted February 4, 2008 I use a metal Cutting disc. sharp yet light grind. Best wear and best performance with Heatsink reds!! Only need to grind it every 2-3 months. Echo 2007 are pretty dam good with holding a grind Quote Link to comment Share on other sites More sharing options...
JoeM Posted February 4, 2008 Report Share Posted February 4, 2008 (edited) Have you tried cleaning your rim with paint thinner or whitespirit? Your rim might of got contaminated. Wack some of that on your rim then go out for a bit and drag your brake till it holds.Joe Edited February 4, 2008 by Joeee Quote Link to comment Share on other sites More sharing options...
steve@banbury-trials Posted February 5, 2008 Report Share Posted February 5, 2008 (edited) i do my grinds with a disc simular to this taadaa!,the gaps in the disc seem to add a bit of carnage to the rim steve Edited February 5, 2008 by banbury trials Quote Link to comment Share on other sites More sharing options...
echo_rob Posted February 5, 2008 Author Report Share Posted February 5, 2008 (edited) i do my grinds with a disc simular to this taadaa!,the gaps in the disc seem to add a bit of carnage to the rim stevereally????? isn't that a masonry disk???cheersrob Edited February 5, 2008 by echo_rob Quote Link to comment Share on other sites More sharing options...
Krisboats Posted March 7, 2008 Report Share Posted March 7, 2008 i do my grinds with a disc simular to this taadaa!,the gaps in the disc seem to add a bit of carnage to the rim steveI've tried one of those before and depending on the rim material its entriely possible to rip chunks (it was about 3mm deep and 4mm across at the top of the rim) out of the rim. Quote Link to comment Share on other sites More sharing options...
Alex Dark Posted March 7, 2008 Report Share Posted March 7, 2008 those types of discs are really not a good idea...you really want a peoper metal cutting disc, quite thin one Quote Link to comment Share on other sites More sharing options...
steve@banbury-trials Posted March 7, 2008 Report Share Posted March 7, 2008 really????? isn't that a masonry disk???cheersrobyeah it is ,i find it gives a better grind than a metal cutter,but that might be because i've used craps disc before.steve Quote Link to comment Share on other sites More sharing options...
psycholist Posted March 7, 2008 Report Share Posted March 7, 2008 Smooth rims are great till you hit one spot of wet and your brakes stop working... My last grind was with a cutting disk rather than a masonry disk I think and it eats brake blocks but works better than anything I've ever used before . Quote Link to comment Share on other sites More sharing options...
Tom Booth Posted March 7, 2008 Report Share Posted March 7, 2008 I just ground my rim with a diamond tip tile cutting disc, its awsome! Put some super shapr lines in the rim. Quote Link to comment Share on other sites More sharing options...
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