Sidmouth Posted July 21, 2019 Share I eventual upgraded from 160mm to 180 mm rear rotor, however the vibrations which i have never experienced before make it impossible to brake, I have tried adding the 20MM spacers in a solid block and building them with individual spacers, the results are the same, radical vibrationsIt only happened when i put the 180mm on, 160mm was fine.any idea Link to comment Share on other sites More sharing options...
MudLark Posted July 21, 2019 Share Why did you go to 180mm anyway? Link to comment Share on other sites More sharing options...
Paul Ruinaard Posted July 21, 2019 Share More details of the setup are needed. What sort of vibration and when do they start? Link to comment Share on other sites More sharing options...
Ozzie NL Posted July 21, 2019 Share Why did you go to 180mm anyway?Always this helpful? Link to comment Share on other sites More sharing options...
Ashchest Posted July 21, 2019 Share I am also experiencing shuddering on my rear 180mm since I put new pads on.  It shudders at very low speeds - been doing it for about 200km's Your vibration may be due to it being a new disc that needs some time.  I know some new discs might need some time to "bed in" - when they vibrate it is sometimes suggested to sand it with very fine paper on top of a hard and perfectly flat surface. I am not sure why my brakes are shuddering now because I have changed pads a couple of times in the past - perhaps I need to bleed my brakes which was last done 4 years ago....? Eugéne Alberts 1 Link to comment Share on other sites More sharing options...
porqui Posted July 22, 2019 Share Did you clean your discs before installing? !0 to 1 your pads are dirty/contaminated. Maak skoon. Link to comment Share on other sites More sharing options...
MudLark Posted July 22, 2019 Share Always this helpful?It was simply an honest question and there's absolutely no need for the sarcasm. Jackal355 1 Link to comment Share on other sites More sharing options...
Ashchest Posted July 22, 2019 Share Ek sal myne ook maar uithaal en deeglik skoon maak , disks en pads Link to comment Share on other sites More sharing options...
MORNE Posted July 22, 2019 Share are they those cheese grater type discs? with the huge holes/cutouts? I moved a set of deore m6000 brakes I had on my previous bike to my wifes bike that has those type of discs and when i bed them in for her I felt what could probably be described as a light shudder.....as those nasty cutouts chew up the brake pads. They give the feel of better stopping power but they chew through pads like crazy imo. Link to comment Share on other sites More sharing options...
Sidmouth Posted July 22, 2019 Share im 92 KG so I thought 180 would cool better.rotors are new TRP rotorsyes, cleaned rotors a few time, even taken out pads, sanded to flat keen with alcohol, and reinstalled,ive changed the 20 spacers from solid to single, realigned the works, I do a few enduros and see guys often upsize to 180mm, so im sure the problem is documented, hoping someone has had a similar experience MudLark 1 Link to comment Share on other sites More sharing options...
Paul Ruinaard Posted July 22, 2019 Share are they those cheese grater type discs? with the huge holes/cutouts? I moved a set of deore m6000 brakes I had on my previous bike to my wifes bike that has those type of discs and when i bed them in for her I felt what could probably be described as a light shudder.....as those nasty cutouts chew up the brake pads. They give the feel of better stopping power but they chew through pads like crazy imo.The bigger the cutouts in the discs the lighter they are but the downside is that they have a lower surface and volume area tso less for the pads to grab on and less to dissipate heat. Be careful - there was a post on the hub where someone bought a really large piece of fynbos when he was using those rotors after a long downhill and heat built up - he basically had no brakes. For this to be useful we need the details of which 180mm rotors were used, how were the pads aligned. I assume old pads. What discs? Was it torqued down correctly etc.  Not all rotors are made equal as we are quickly establishing.... Link to comment Share on other sites More sharing options...
Ashchest Posted July 22, 2019 Share Mine are the RT62 M rotors of which the rear one shudder a lot when braking hard moving toward stand still. Â At higher speed and light braking it is all fine. Â I will take them apart later today to see if there are pieces missing on the sides of the pad from any "grating"Â Capricorn 1 Link to comment Share on other sites More sharing options...
MORNE Posted July 22, 2019 Share those are finethese are the chees grater types. they suck. The leading edges are more and the lips just eat up pads like crazy. they are also lighter and less stiff because all the material removed....making them warp so easy. Edited July 22, 2019 by morneS555 Link to comment Share on other sites More sharing options...
MORNE Posted July 22, 2019 Share to addto this.I have owned both these rotors..the older Hope saw tooth and the new ones with round holes in. The new ones are infinitely less noisy and work alot better. the saw tooth ones, especially with organic pads....made a noticeable 'shudder'or vibrating sound when you grabbed a hand full of brakes....like you could hear the pad material being removed lol ( DRRRRRRRRRR) Edited July 22, 2019 by morneS555 Link to comment Share on other sites More sharing options...
HowardSteele Posted July 22, 2019 Share Have you tried removing the rotor and clean mount and reseat when you tighten up the screws do it like you do a car wheel order 1/3/5 etc. Link to comment Share on other sites More sharing options...
Jewbacca Posted July 22, 2019 Share Are they Good Vibrations...... MORNE 1 Link to comment Share on other sites More sharing options...
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