Lewis Gething Posted October 25, 2012 Report Share Posted October 25, 2012 Hi guys, So having owned my TNN LGM pads for over a year now, I have been very impressed with their performance when they actually work. However, ever since I first got them, I have been experiencing the same issue: Whenever I clean any dirt or metallicy stuff from the pad surface, the brake performance suffers tremendously, even though the material is completely clean. A couple of weeks back I put a sharp, fresh grind on both rims, and sanded the top layer off grime of the LGMs, thinking that the performance would just bed in over time, but after riding for 20+ hours, the pads are still unable to lock enough for me to even do a small endo or anything similar, despite the brake being setup perfectly with a fresh bleed too. I have tried to add some fizzy drink stuff to the rim (Trialtech SL Square Hole), as this usually does the trick, but it hasn't worked at all this time. My question is has anyone else experienced similar issues to this with LGMs, and if so, how did you go about solving it? How good is the LGM material as a front brake pad compared to others? Maybe it's time to get some ADM or Belaey refills... Thanks, Lewis Quote Link to comment Share on other sites More sharing options...
Greetings Posted October 25, 2012 Report Share Posted October 25, 2012 Haven't had such issues with my LGMs. What do you use to clean the dirt from the pad surface? Quote Link to comment Share on other sites More sharing options...
trialsiain Posted October 25, 2012 Report Share Posted October 25, 2012 Hi guys, So having owned my TNN LGM pads for over a year now, I have been very impressed with their performance when they actually work. However, ever since I first got them, I have been experiencing the same issue: Whenever I clean any dirt or metallicy stuff from the pad surface, the brake performance suffers tremendously, even though the material is completely clean. A couple of weeks back I put a sharp, fresh grind on both rims, and sanded the top layer off grime of the LGMs, thinking that the performance would just bed in over time, but after riding for 20+ hours, the pads are still unable to lock enough for me to even do a small endo or anything similar, despite the brake being setup perfectly with a fresh bleed too. I have tried to add some fizzy drink stuff to the rim (Trialtech SL Square Hole), as this usually does the trick, but it hasn't worked at all this time. My question is has anyone else experienced similar issues to this with LGMs, and if so, how did you go about solving it? How good is the LGM material as a front brake pad compared to others? Maybe it's time to get some ADM or Belaey refills... Thanks, Lewis contamination ? Quote Link to comment Share on other sites More sharing options...
Twitch-119 Posted October 25, 2012 Report Share Posted October 25, 2012 I've been running these for quite some time now using tar (boo-hiss) and love them, works amazingly well in the dry, obviously. Cant think of a time I've cleaned them or the rim because of the tar getting wet and what not, maybe just don't clean them and see how that goes, and have you tried tar? Unless your riding in the rain all the time and dont mind the noise, I dont see why everyone complains. (awaits tar hating replies...) Quote Link to comment Share on other sites More sharing options...
Jake. Posted October 25, 2012 Report Share Posted October 25, 2012 There's no real point cleaning pads, unless you're running a smooth rim it usually helps. But with a grind, if I have to clean the pads I'd use sandpaper, use rough sandpaper then use fine grit sandpaper. Also try giving the pads edges like with the belaeys, heard lots of good stuff from people who did that to their pads. May I ask why you were cleaning the pads? I'd understand if they were muddy and stuff, or if they were really black. I've been running these for quite some time now using tar (boo-hiss) and love them, works amazingly well in the dry, obviously. Cant think of a time I've cleaned them or the rim because of the tar getting wet and what not, maybe just don't clean them and see how that goes, and have you tried tar? Unless your riding in the rain all the time and dont mind the noise, I dont see why everyone complains. (awaits tar hating replies...) +1 for tar, love the stuff. I did have a small bag of it, about 2 10p's in size. However my Mum thought it was drugs, (black hero in? - gave it a space so that trials forum wouldn't come up when people search for it ) so she threw it away... Quite annoying as I can never find any on the streets (maybe I'm not looking well enough?), I got given it on a ride. Looked a bit like this Quote Link to comment Share on other sites More sharing options...
ashleys sugden Posted October 25, 2012 Report Share Posted October 25, 2012 ive had problems with my lgms, i bought them three weeks ago, i first set them up fine,they were load and held really well, and now they are the complete opposite Quote Link to comment Share on other sites More sharing options...
Blake Posted October 25, 2012 Report Share Posted October 25, 2012 There's no real point cleaning pads, unless you're running a smooth rim it usually helps. But with a grind, if I have to clean the pads I'd use sandpaper, use rough sandpaper then use fine grit sandpaper. Also try giving the pads edges like with the belaeys, heard lots of good stuff from people who did that to their pads. May I ask why you were cleaning the pads? I'd understand if they were muddy and stuff, or if they were really black. +1 for tar, love the stuff. I did have a small bag of it, about 2 10p's in size. However my Mum thought it was drugs, (black hero in? - gave it a space so that trials forum wouldn't come up when people search for it ) so she threw it away... Quite annoying as I can never find any on the streets (maybe I'm not looking well enough?), I got given it on a ride. I have like 2 kilos of tar 1 Quote Link to comment Share on other sites More sharing options...
Jake. Posted October 25, 2012 Report Share Posted October 25, 2012 I have like 2 kilos of tar Send me some? It's not like roofing tar is it? Quote Link to comment Share on other sites More sharing options...
Blake Posted October 25, 2012 Report Share Posted October 25, 2012 Roofing tar is the best. Quote Link to comment Share on other sites More sharing options...
Lewis Gething Posted October 26, 2012 Author Report Share Posted October 26, 2012 Still don't know what is causing the pad's poor performance. Ordered some TNN ADM Refills yesterday, they should get here today Quote Link to comment Share on other sites More sharing options...
trialsiain Posted October 26, 2012 Report Share Posted October 26, 2012 Still don't know what is causing the pad's poor performance. Ordered some TNN ADM Refills yesterday, they should get here today let us know how they perform compared to the lgms ? 1 Quote Link to comment Share on other sites More sharing options...
SamKidney Posted October 26, 2012 Report Share Posted October 26, 2012 let us know how they perform compared to the lgms ? Ive told you this. 1 Quote Link to comment Share on other sites More sharing options...
trialsiain Posted October 26, 2012 Report Share Posted October 26, 2012 Ive told you this. yea i know but theres always different opinions 2 Quote Link to comment Share on other sites More sharing options...
Jake. Posted October 26, 2012 Report Share Posted October 26, 2012 Roofing tar is the best. Road tar... yea i know but theres always different opinions Which is why there's a pad-reviews thread. Quote Link to comment Share on other sites More sharing options...
SamKidney Posted October 26, 2012 Report Share Posted October 26, 2012 (edited) LGM's - Quality out and out performance. Relatively grind dependant though, but are very consistant right down to a dull grind provided you dont alter your setup. Insane levels of bite, very nice sound and offer a load of hold. Like I said, best used on a fresh grind, be it light, medium or harsh. I had great results with all. ADM's - Likewise, brilliant performance on a fresh grind. Less grind dependant, remaining more consistant than the LGM's all the way through the grind. Im running mine on a light fresh grind at the minute, and couldnt ask for a better brake. Exactly what I look for. Mega bite, loud sound and buckets of hold. They remain that way all through the grind too. Work very well from light to harsh grinds, and are very good as a smooth rim pad too once they have bedded in, like any other pad. I'd go for the ADM's. They just work. Ive had to remove my brake, and reset it after a rebleed. Pads were back up to top performance in a matter of minutes after they settle back into the rim. Im running no booster with them on my Echo, and the hold is insane. Bite is through the roof. Im tempted to go for a 2 bolt booster. Lessen the bite a tad, but get even more hold from them. They're SO good. Edited October 26, 2012 by Echo Lite 09 Quote Link to comment Share on other sites More sharing options...
Mark W Posted October 26, 2012 Report Share Posted October 26, 2012 Trials-Forum Brake Pad Circle of Life: - Buy new pair of 'good' pads. - Put new pads on bike. - Ride. - Go online: "These pads are amazing!" - Continue to ride. - Grind wears out/get shit on rim or pads. - Go online: "These pads have gone shit!" - Re-grind rim. - Ride. - Don't give anything a chance to settle down. - No instant performance improvement, re-grind rim with a harsher grind. - Same result as before. - Go online: "These pads are shit, what pads are good?" And repeat. 7 Quote Link to comment Share on other sites More sharing options...
SamKidney Posted October 26, 2012 Report Share Posted October 26, 2012 Leaving your pads alone is the best thing to do. Just regrind and wait until performance comes back, which it will. Quote Link to comment Share on other sites More sharing options...
trialsiain Posted October 26, 2012 Report Share Posted October 26, 2012 Trials-Forum Brake Pad Circle of Life: - Buy new pair of 'good' pads. - Put new pads on bike. - Ride. - Go online: "These pads are amazing!" - Continue to ride. - Grind wears out/get shit on rim or pads. - Go online: "These pads have gone shit!" - Re-grind rim. - Ride. - Don't give anything a chance to settle down. - No instant performance improvement, re-grind rim with a harsher grind. - Same result as before. - Go online: "These pads are shit, what pads are good?" And repeat. thats weird, pretty much the exact thing i done 1 Quote Link to comment Share on other sites More sharing options...
trialsiain Posted October 26, 2012 Report Share Posted October 26, 2012 Although i have got them good hold now just no bite at all though :/.. ill shutup now and stop overtaking your thread streetrials. Quote Link to comment Share on other sites More sharing options...
Lewis Gething Posted October 26, 2012 Author Report Share Posted October 26, 2012 (edited) Trials-Forum Brake Pad Circle of Life: - Buy new pair of 'good' pads. - Put new pads on bike. - Ride. - Go online: "These pads are amazing!" - Continue to ride. - Grind wears out/get shit on rim or pads. - Go online: "These pads have gone shit!" - Re-grind rim. - Ride. - Don't give anything a chance to settle down. - No instant performance improvement, re-grind rim with a harsher grind. - Same result as before. - Go online: "These pads are shit, what pads are good?" And repeat. I wasn't asking which pads were 'good' because I know TNN make quality products. I just wanted to see if anyone else had experienced similar issues with regards to cleaning/sanding down the material. To those asking "why did you feel the need to sand them down?". I had ridden with the pads slightly out of the backings for a while, but since the performance was still great, I thought I'd leave it alone until the next rim grind. I sanded off a bunch of material to make the pads sit parallel in the backings again but this ruined them somehow? Got the ADMs now anyway, haven't tried them yet, but I can give my first impressions if you like, but you know their gonna be great pads anyway so whats the point? Edited October 26, 2012 by streetrials24 Quote Link to comment Share on other sites More sharing options...
Le @ Tnn Engineering Posted October 26, 2012 Report Share Posted October 26, 2012 Hi guys, So having owned my TNN LGM pads for over a year now, I have been very impressed with their performance when they actually work. However, ever since I first got them, I have been experiencing the same issue: Whenever I clean any dirt or metallicy stuff from the pad surface, the brake performance suffers tremendously, even though the material is completely clean. A couple of weeks back I put a sharp, fresh grind on both rims, and sanded the top layer off grime of the LGMs, thinking that the performance would just bed in over time, but after riding for 20+ hours, the pads are still unable to lock enough for me to even do a small endo or anything similar, despite the brake being setup perfectly with a fresh bleed too. I have tried to add some fizzy drink stuff to the rim (Trialtech SL Square Hole), as this usually does the trick, but it hasn't worked at all this time. My question is has anyone else experienced similar issues to this with LGMs, and if so, how did you go about solving it? How good is the LGM material as a front brake pad compared to others? Maybe it's time to get some ADM or Belaey refills... Thanks, Lewis I totally understand why these threads are started. There is nothing more frustrating then forking out good money and spending your time to achieve the perfect set up after reading countless brake threads. Then when all is well everything turns pear shaped and your brakes stop working. Very painful. I spend so much time answering emails on this subject and this is what I have found out. 1. If your brake isn't performing all of a sudden regrind. 9/10 times this will fix the issue. 2. If this doesn't work you most likely have a contamination problem. You maybe in denyl about it but it's very likely. As with disc brake the tiniest amount of oil will kill your brake performance. Oil + maguras means this happens more than we would like. A leaking fitting on the slave cylinder or a leaking slave cylinder piston behind the pad will over time will make there way to the braking surface and game over. You'll need new refills and a regrind end of story. 3. If your brake is working and you happy with it. Don't touch it. Besides regrinding and keeping the slave cylinders clean and oil free. Don't change anything. Keep you grind fresh and you rim/pads contamination free and 99% of you issues will be gone. Me and Lewis Greenhalgh spent hours trying to right his brake set up tried eveything and nothing worked. What happened is that a small amount of oil from the wheel building process got onto the rim and impregnated into the pad. We sanded the pads down 0.5 mm and still no good. The oil was deep in the pads. Solution new refills and regrind and the brake is still perfect 3 month later. Quote Link to comment Share on other sites More sharing options...
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