duncanp Posted July 8, 2014 Report Share Posted July 8, 2014 Hi all, Good forum you have here! I used to ride trials 10/15 years ago and recently have had a hankering to get back into it. Back in the day I always wanted a Pashley 26Mhz, but couldnt afford one. I found one last week and snapped it up as my new ride. Attached photo. I intend to restore it to its former glory, but its in pretty good nick any way. The rear rim is heavily ground and no matter how much i adjust it, the brake howls like mad and resonates through the steel frame. I swear you could hear it a mile away!! Anyway, its no good for me, and a shame as it was a really nice mavic ceramic rim. Is there any tricks to reducing this noise (different pads/sand off the grind), or am i going to have to get new a rim? Duncan Quote Link to comment Share on other sites More sharing options...
isitafox Posted July 8, 2014 Report Share Posted July 8, 2014 Grinding a rim is a pretty common thing in trials, especially if you want a brake that works! The only thing you can do is replace the rim but if you do make sure you get a set of pads that work well on a smooth rim like Heatsink Yellows or you'll be in for some pain! Quote Link to comment Share on other sites More sharing options...
jack dickinson Posted July 8, 2014 Report Share Posted July 8, 2014 Try tnn beley pads, it says they are make less sound than the rest of the tnn pads.Also heatsink yellows on a smooth rim will make just as much sound, if not more. Quote Link to comment Share on other sites More sharing options...
HippY Posted July 8, 2014 Report Share Posted July 8, 2014 If I want to be honest, enjoy it. you will get stockholm syndrome about it and start like the sound and when you go for a different brake you will miss the power, sharpness and the sound of a good maggie 1 Quote Link to comment Share on other sites More sharing options...
duncanp Posted July 8, 2014 Author Report Share Posted July 8, 2014 Interesting! Back when i started in trials, we used to use road tar (which I see some people still do) but I'd not come across rim grinding until last weekend. Do you guys just put up with that noise as a sacrifice for decent bite? Its like when i pull the brake lever im sounding of an air horn! I will try some other pad types like those TNNs before switch for a standard rim finish. Fingers crossed! I did try some standard black magura pads on the ground rim, 10 pulls on the lever and the pads were completely toasted! Quote Link to comment Share on other sites More sharing options...
JJ Leigh Posted July 8, 2014 Report Share Posted July 8, 2014 the noise doesn't concern me at all to be honest if anything it lets me know my pads work it depends on what rim your using too, ive got this shitty onza one and some tnn lgm pads and it doesn't make noise till I put tar on it anyway Quote Link to comment Share on other sites More sharing options...
HippY Posted July 8, 2014 Report Share Posted July 8, 2014 black maggies are to forget Actually when I had it I used it as a horn, as it wous loud enough, but at proper braking you could see people faces I had a maggie, the pads worn in an angle, they were good green rockmans, the mounts were fcuked, the rim was actually properly grinded For commuting I could not use it to slow me down, as the wheel locked immediately, otherwise it was just noisy For trials use, they bit, and there was no god that could move the wheel I would say give it a go, have a good feel with good pads and mounts, with a fresh grind, and see how does it perform Quote Link to comment Share on other sites More sharing options...
isitafox Posted July 8, 2014 Report Share Posted July 8, 2014 This is partially why front disc is the way forward! To be fair you get used to the noise, it doesn't bother me at all anymore and you kind of get accustomed to what your brake sounds like when it's working and how the noise changes when it's not performing like it should. People still use tar but that's all down to personal preference, the one thing that a grind dominates over tar is when it's wet a brake with a grind still works! Quote Link to comment Share on other sites More sharing options...
N.Wood Posted July 8, 2014 Report Share Posted July 8, 2014 Could try sanding the rim and seeing how it is before you fork out on anything. Often a completely smooth rim is louder and has more bite than a sanded down grind. Could also try running one 'good' pad and one 'shit' pad on a sanded rim. Sounds like you're not too bothered about out and out hold and bite but want to actually drag and modulate your brake? Quote Link to comment Share on other sites More sharing options...
duncanp Posted July 9, 2014 Author Report Share Posted July 9, 2014 Thanks guys, Could try sanding the rim and seeing how it is before you fork out on anything. Often a completely smooth rim is louder and has more bite than a sanded down grind. Could also try running one 'good' pad and one 'shit' pad on a sanded rim. Sounds like you're not too bothered about out and out hold and bite but want to actually drag and modulate your brake? Good call, I'll try sanding before I give up on the ground rim. Yes your right, hold and bite are not that important to me. A little bit of slip is ok. Im a big fan of manuals so brake modulation is a must whilst i re-learn the balance point. Quote Link to comment Share on other sites More sharing options...
onza_ash Posted July 17, 2014 Report Share Posted July 17, 2014 nice bike you got there, reminds me of the bikes i used to see while growing up. I find that using heatsink blues on a smooth rim works for me, but was thinking of getting a rim grind at some point. I also find that using a front disc is so much better imo. Quote Link to comment Share on other sites More sharing options...
learnt-in-the-nineties Posted July 21, 2014 Report Share Posted July 21, 2014 Hi, I also rode trials 13 odd years ago and got back into it over the last year or so. I too had never heard of rim grinding til then either! I rode a kona 16" with v's and never really struggled at all you dont need magura's just some good v brake pads. Ive just bought a 20" bike thats got v's and ground rims I changed the pads and there is plenty of bite! Racks me off when people tell people you need this you need that when you dont, I learnt the basics on a 18" gt timberline with rst forks! Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.