Mark W Posted May 28, 2015 Report Share Posted May 28, 2015 They pretty much all work the same. Stone cutting seem reasonable. The important thing is to not go over the same bit repeatedly as you lose the sharpness of the grind. 1 Quote Link to comment Share on other sites More sharing options...
bing Posted May 28, 2015 Report Share Posted May 28, 2015 Any specific cutting discs you could recommend? Yeah. Get the Bosch or Dewalt cutting disks, they last quite a while. The cheap and nasty ones wear away really quickly and tend to break up. Quote Link to comment Share on other sites More sharing options...
Greetings Posted May 29, 2015 Author Report Share Posted May 29, 2015 I've done all the above and the brake is even crappier than it was. Rear works worse than on a dead grind, front is way worse - admittedly on new Blueberry pads which I think would have bedded in by now. This is so f*cking frustrating. I'd just go back to a disc brake if it didn't add 1kg to my bike. I need at least 3 passes to grind the full width of the rim, using a 125mm 1.4mm diamond disc. Hence you can see 3 "separate" grinds. I'm only doing it in one direction as advised and not going over the same area twice if I can help it. Any suggestions? Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted May 29, 2015 Report Share Posted May 29, 2015 Looks pretty aggressive that... Go back to the LGMs, try an old knackered fibre-based grinding / cutting disc rather than a diamond one, and constantly think about trying to 'scuff' the surface of the rim rather than remove material. You barely even have to touch the rim, even with weight of the grinder will be too much pressure. 1 Quote Link to comment Share on other sites More sharing options...
niconj Posted May 29, 2015 Report Share Posted May 29, 2015 I think it's the pads rim combo. Is this a Trialtech rim? Quote Link to comment Share on other sites More sharing options...
JD™ Posted May 29, 2015 Report Share Posted May 29, 2015 Someone will correct me if I'm wrong, but I think there's also a bedding in period every time you put a new grind on there. I'm certainly no expert though. Personally I'd just stick the disc back on – is the frustration worth 1kg? Quote Link to comment Share on other sites More sharing options...
niconj Posted May 29, 2015 Report Share Posted May 29, 2015 Personally I'd just stick the disc back on – is the frustration worth 1kg? And it's not gonna be 1kg. I went back to front disc for almost the same reasons. Quote Link to comment Share on other sites More sharing options...
Greetings Posted May 29, 2015 Author Report Share Posted May 29, 2015 The rim is a Bonz. Someone will correct me if I'm wrong, but I think there's also a bedding in period every time you put a new grind on there. I'm certainly no expert though. Personally I'd just stick the disc back on – is the frustration worth 1kg? Yeah, especially as the bike is already heavier than I'd like it to be. And it's not gonna be 1kg. I went back to front disc for almost the same reasons. Sadly it is. Heavier spokes, hub, much much heavier forks and a much heavier brake. The difference between just the brake w/o forks is 0.4kg which is fine. The forks are a good 0.4kg heavier and probably not as stiff. So yeah, not 1kg but 0.8. I already have a heavy bike. Of course if nothing else works I'll be forced to switch back do a disc. Or just get some tar (not a huge fan). Adam I'll try your suggestion later today and update. Quote Link to comment Share on other sites More sharing options...
niconj Posted May 29, 2015 Report Share Posted May 29, 2015 Sadly it is. Heavier spokes, hub, much much heavier forks and a much heavier brake. The difference between just the brake w/o forks is 0.4kg which is fine. The forks are a good 0.4kg heavier and probably not as stiff. So yeah, not 1kg but 0.8. I already have a heavy bike. I don't think it's that much but in order to know that one would have to see your bike and its specs... Quote Link to comment Share on other sites More sharing options...
SamKidney Posted May 29, 2015 Report Share Posted May 29, 2015 Are they heat sink Blues? I found my brakes were at their best running either LGMs or ADMs. ADMs seemed to work on any surface on any rim. My front brake is also shit, same set up as I ran on my karbons but now with a b1k3 fork and the bite and hold has dissapeared, but my pads (cousts) are buggered. I found a harder pad worked better up front. I seem to go through front pads way quicker than the rears. Quote Link to comment Share on other sites More sharing options...
dann2707 Posted May 29, 2015 Report Share Posted May 29, 2015 My front brakes have always worked much better than my rears so this situation is weird as cheese. Not tempted by a front vee? They always work so well, massive amounts of hold. Quote Link to comment Share on other sites More sharing options...
Greetings Posted May 29, 2015 Author Report Share Posted May 29, 2015 Current grind, is this better? The bite is mental, not sure about hold because I haven't ridden it yet. Are they heat sink Blues? I found my brakes were at their best running either LGMs or ADMs. ADMs seemed to work on any surface on any rim. My front brake is also shit, same set up as I ran on my karbons but now with a b1k3 fork and the bite and hold has dissapeared, but my pads (cousts) are buggered. I found a harder pad worked better up front. I seem to go through front pads way quicker than the rears. Yeah, blues. Apparently an amazing compound, never tried it. Back to LGM's currently. I don't think it's that much but in order to know that one would have to see your bike and its specs... It is actually, got a calculation somewhere. Trialtech forks and MT5 brake. My current setup is really light, the whole front end (complete wheel with tyre, forks, brake with mounts and pads) weighs under 2kg. Quote Link to comment Share on other sites More sharing options...
AndeeeMK2 Posted May 29, 2015 Report Share Posted May 29, 2015 Rockman and try-all hole rims seems to hold a grind pretty well. I have ran different pads and always ran a very harsh grind with them. (Metal cutting disc) One method that seems to work and majority of you might laugh but you can't knock it until you try it..... Violin wax.... It works amazing sometimes better than your average Joe set up.... All you do is apply a light amount and it isn't noticeable on the rim. Jigga and the hull boys introduced it to me I think Andrew Dickey and all the oz lads were the first to try it out. I've used it on a few occasions when my grind or rear brake has gone pants great temp solution and has never let me down. It was that good I thought the cousts were going to rip out the backings. Quote Link to comment Share on other sites More sharing options...
Greetings Posted May 29, 2015 Author Report Share Posted May 29, 2015 Yeah, rosin is amazing. Works in the dry and works in the wet equally well. We apply it using thinner over here. I used to have some but it got binned. Might get some. Quote Link to comment Share on other sites More sharing options...
Filo Posted May 30, 2015 Report Share Posted May 30, 2015 The diamond cutting wheels are no were near as good as a normal cutting wheel. I find the diamond wheel grind blunts really quickly and gives terrible hold, the brake slips heaps. For fronts the 1mm thin cutting wheel gives a nice fine grind which is great on the front because you get bit and can still modulate the brakes fairly well. For rear a 3mm cutting wheel give best results. You can change the how rough the grind is by changing the angle of the cutting wheel. Using a grinding wheel ends with a really rough grind,similar to using the diamond wheel. Not as sharp but last longer. Quote Link to comment Share on other sites More sharing options...
niconj Posted May 30, 2015 Report Share Posted May 30, 2015 The diamond cutting wheels are no were near as good as a normal cutting wheel. I find the diamond wheel grind blunts really quickly and gives terrible hold, the brake slips heaps. For fronts the 1mm thin cutting wheel gives a nice fine grind which is great on the front because you get bit and can still modulate the brakes fairly well. For rear a 3mm cutting wheel give best results. You can change the how rough the grind is by changing the angle of the cutting wheel. Using a grinding wheel ends with a really rough grind,similar to using the diamond wheel. Not as sharp but last longer. I disagree... I'll post up a picture of my rear wheel grind after having ridden for a longer period. Quote Link to comment Share on other sites More sharing options...
Filo Posted May 30, 2015 Report Share Posted May 30, 2015 What part do you disagree with? The problem with all these combinations and different ways of doing it. No one will ever agree. I'm just sharing what I have found, I have basically tried every pad, every grind across a wide range of rims. My problem is I'm a big guy and need to completely trust my brakes for every single move. What I've found stops my husky build and is quite reliable for full day rides. Quote Link to comment Share on other sites More sharing options...
niconj Posted May 30, 2015 Report Share Posted May 30, 2015 What part do you disagree with? The part of the diamond disc. Works very well for me. 1 Quote Link to comment Share on other sites More sharing options...
FamilyBiker Posted May 30, 2015 Report Share Posted May 30, 2015 (edited) threadstarter might like to give my selfmade pads a go as a last resort. for me and all mates i gave them to they did the job on several rims and grinds. on my atomlab rim the get better the flatter the grind goes lol on my mates echo tr theyre just amazing on a light to sharp grind. just offering that,no commercial background Edited May 30, 2015 by FamilyBiker Quote Link to comment Share on other sites More sharing options...
jnthebiker Posted May 30, 2015 Report Share Posted May 30, 2015 threadstarter might like to give my selfmade pads a go as a last resort. for me and all mates i gave them to they did the job on several rims and grinds. on my atomlab rim the get better the flatter the grind goes lol on my mates echo tr theyre just amazing on a light to sharp grind. just offering that,no commercial background You made pads? That's awesome! Got any pics? Quote Link to comment Share on other sites More sharing options...
Filo Posted May 30, 2015 Report Share Posted May 30, 2015 The part of the diamond disc. Works very well for me. How long you been using it? How many grinds? How much riding have you done with it? At first I was super impressed, then after using it for many months I started to notice the issues with the durability and consistency of the finish. Quote Link to comment Share on other sites More sharing options...
FamilyBiker Posted May 31, 2015 Report Share Posted May 31, 2015 You made pads? That's awesome! Got any pics? http://www.trials-forum.co.uk/topic/182411-has-anyone-made-his-own-pad-refills/ Quote Link to comment Share on other sites More sharing options...
Greetings Posted May 31, 2015 Author Report Share Posted May 31, 2015 Sit rep - the brake is much better on LGM's with a very light grind as Adam advised. Still not satisfactory but definitely better than it was in a long time. Will experiment with the Blueberry and Trialtech pads. Quote Link to comment Share on other sites More sharing options...
SamKidney Posted May 31, 2015 Report Share Posted May 31, 2015 I'm just trying to make do with my shitty front brake. Only way it holds is if I fully comit to any move to front, which can't be a bad thing if it becomes a habit Quote Link to comment Share on other sites More sharing options...
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