Christiaan Posted February 1, 2015 Report Share Posted February 1, 2015 WFT happened here??! Massive brake failure. Both caliper mounts broke off, aswell as the adaper. I suspect one of the mounts failed, causing the adapter and other mount to brake aswell. What do you guys think? 203mm rotor to blame? m810 calipers are pretty strong as far as I'm aware. 1 Quote Link to comment Share on other sites More sharing options...
niconj Posted February 1, 2015 Report Share Posted February 1, 2015 Happened to my 640 Zees with a 180mm rotor as well. Quote Link to comment Share on other sites More sharing options...
Mark W Posted February 1, 2015 Report Share Posted February 1, 2015 It wouldn't surprise me if it was the adaptor breaking causing the caliper to break - I've seen it happen to someone in person. If you've got an IS mount on your frame and you're running a 203mm rotor too you've got a lot of leverage going through a relatively spindly little adapter which won't be helping too. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted February 1, 2015 Report Share Posted February 1, 2015 As above, adaptor broke causing the other failures. Quote Link to comment Share on other sites More sharing options...
FamilyBiker Posted February 2, 2015 Report Share Posted February 2, 2015 (edited) thats why i never looked back from having a magura on the rear.happened 2 times and a third one was cracked as i noticed and thats for a 180mm rotor Edited February 2, 2015 by FamilyBiker Quote Link to comment Share on other sites More sharing options...
niconj Posted February 2, 2015 Report Share Posted February 2, 2015 Mine broke on both bolts and the adaptor was "only" bent and not broken. Quote Link to comment Share on other sites More sharing options...
Aldred_85 Posted February 2, 2015 Report Share Posted February 2, 2015 I am not saying as a definate, as i've no other failures to go by. But, i'm not entirely sure it was down to adaptor. The point at which the sheer is in the adaptor looks to match the pivoting effect of the upper caliper hole sheering. Taking the caliper backwards, inturn sheering the adaptor, finally, snapping the caliper at the bottom. I am not a scientist, or a git. Its just what it looks like. I still love everyone. Does that statement stop me getting mass hate? Haha. Quote Link to comment Share on other sites More sharing options...
Paperclip Posted February 2, 2015 Report Share Posted February 2, 2015 I am not saying as a definate, as i've no other failures to go by. But, i'm not entirely sure it was down to adaptor. The point at which the sheer is in the adaptor looks to match the pivoting effect of the upper caliper hole sheering. Taking the caliper backwards, inturn sheering the adaptor, finally, snapping the caliper at the bottom. I am not a scientist, or a git. Its just what it looks like. I still love everyone. Does that statement stop me getting mass hate? Haha. You only get mass hate on OTN. I agree I have cracked one across the bolt hole at the top and had a similar issue, looks like it's been cracked there had some abuse managed to flex more than it should because the top bolt "ain't doing shit" then snapped both the other two parts. So many people have snapped those Shimano adapters to date! Quote Link to comment Share on other sites More sharing options...
Ali C Posted February 2, 2015 Report Share Posted February 2, 2015 I feel pretty lucky my second hand saints have lasted 3 years now Quote Link to comment Share on other sites More sharing options...
Ross McArthur Posted February 2, 2015 Report Share Posted February 2, 2015 I feel pretty lucky my second hand saints have lasted 3 years now Still using them? Thought you went to Hope rear? Did you just change the lever on the front brake, or was it a whole new unit? Quote Link to comment Share on other sites More sharing options...
Dman Posted February 2, 2015 Report Share Posted February 2, 2015 I think it's the material around the mounting holes it's too thin, I spotted mine early when they were just cracks. I use hope adaptors aswell now a lot beefier. Quote Link to comment Share on other sites More sharing options...
LEON Posted February 2, 2015 Report Share Posted February 2, 2015 (edited) I've said it before, don't use those skinny little Shimano adaptors! They're built completely wrong to take stress. When that adaptor cracks the next move will pretty much finish the caliper off. Use a nice manly Hayes one, they're about £6. Edited February 2, 2015 by LEON Quote Link to comment Share on other sites More sharing options...
niconj Posted February 2, 2015 Report Share Posted February 2, 2015 That wouldn't explain my failure as the adaptor was only bent and both bolt holes were broken. Quote Link to comment Share on other sites More sharing options...
Aldred_85 Posted February 2, 2015 Report Share Posted February 2, 2015 You only get mass hate on OTN. I agree I have cracked one across the bolt hole at the top and had a similar issue, looks like it's been cracked there had some abuse managed to flex more than it should because the top bolt "ain't doing shit" then snapped both the other two parts. So many people have snapped those Shimano adapters to date! Thank goodness for that. I dont think the skiny-ness of the adaptor helped the caliper either. With such a large void between frame mounts and caliper holes some form of bracing or reenforcement(sp?) wouldnt go amiss. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted February 2, 2015 Report Share Posted February 2, 2015 I feel pretty lucky my second hand saints have lasted 3 years now I have a feeling you use Hope adaptors...? This is why I believe it's the adaptor that causes the sort of damage shown above. Quote Link to comment Share on other sites More sharing options...
LEON Posted February 2, 2015 Report Share Posted February 2, 2015 You shouldn't be using a bent adaptor on your brake, considering they're £5 - £10. Yeah other accidents can happen, using bolts with a really wide head should make it harder for that to happen but you can't always get the clearance. ALWAYS use washers too. If only this came in a 203 version. 1 Quote Link to comment Share on other sites More sharing options...
Aldred_85 Posted February 2, 2015 Report Share Posted February 2, 2015 That wouldn't explain my failure as the adaptor was only bent and both bolt holes were broken. Exactly, the 'flex' in the adaptor allowed the 'solid' caliper to crack, and snap. A more solid adaptor, hayes, etc, would minimise flex more than the matchstick shimano one. Quote Link to comment Share on other sites More sharing options...
niconj Posted February 2, 2015 Report Share Posted February 2, 2015 (edited) Bent as in "bent after the failure of the brake". edit: Ok. So if it's the flex in the adaptor... should've known that before using the Shimano one. Edited February 2, 2015 by niconj Quote Link to comment Share on other sites More sharing options...
Aldred_85 Posted February 2, 2015 Report Share Posted February 2, 2015 Bent as in "bent after the failure of the brake". edit: Ok. So if it's the flex in the adaptor... should've known that before using the Shimano one. Im not saying thats a definate, dont want to cause a huge shimano war. But yes i feel flex maybe a contributer to caliper failure. Quote Link to comment Share on other sites More sharing options...
Christiaan Posted February 2, 2015 Author Report Share Posted February 2, 2015 Fortunately I have I spare set of m810 brakes. I`m using a Hayes adapter in the front and I'll try to find one for the back as well. Hopefuly they are stronger then the shimano ones. Still a shame to ruin a perfectly fine m810 like this. :'( Quote Link to comment Share on other sites More sharing options...
LEON Posted February 2, 2015 Report Share Posted February 2, 2015 Hayes are bombproof, thick Formula ones are good too, even cheap Clarks ones are chunkier than Shimano. Hope seem pretty good too, they look the best and are made perfectly but I'd guess the big fat types are still a bit stronger. It's a cheap part you should change every now and then, for the sake of saving a £150 brake! Quote Link to comment Share on other sites More sharing options...
CC12345678910 Posted February 2, 2015 Report Share Posted February 2, 2015 (edited) you overlooked avid ones, they're ~10mm thick. Though them hayes ones look nearly the same, poss. are the same but i've not had both in my hand at the same time. Edited February 2, 2015 by CC12345678910 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.