Sam Song Posted June 19, 2023 Report Share Posted June 19, 2023 The first photo is from today on the 2nd caliper (only two rides old) The last two are from March when I broke the first one. I thought I would give the Saint caliper a chance for the 2nd time and it breaks again... Thankfully the frame has a v brake mount I could use. How are people running disc brakes in the back for trials use without breaking? It is crazy that modern street trials frames do not even have rim brake mounts. Quote Link to comment Share on other sites More sharing options...
Daan Posted June 19, 2023 Report Share Posted June 19, 2023 I break a lot of stuff, but have yet to break a brake. First things first, don't use that flimsy Shimano adapter! The caliper is only as strong as its weakest link, and when your adapter goes, so does the caliper. And that adapter looks bent. 1 Quote Link to comment Share on other sites More sharing options...
Szymon Posted June 19, 2023 Report Share Posted June 19, 2023 And why washers under the caliper? This reduces the contact area. Quote Link to comment Share on other sites More sharing options...
Ali C Posted June 19, 2023 Report Share Posted June 19, 2023 Shimano calipers definitely seem to be some of the weakest out there, Magura, Hope and Hayes are stronger. 3 Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted June 19, 2023 Report Share Posted June 19, 2023 3 things that contribute this: 1. Crap adaptors. 2. Bolts with small heads. 3. Landing backwards with the brake locked. Can see 1 and 2 in the photos, unsure about 3 but its worth thinking about when you ride. 3 Quote Link to comment Share on other sites More sharing options...
craigjames Posted June 19, 2023 Report Share Posted June 19, 2023 I've got a set of hope trials for sale if you want a different brake? Quote Link to comment Share on other sites More sharing options...
Sam Song Posted June 19, 2023 Author Report Share Posted June 19, 2023 (edited) 41 minutes ago, AdamR28 said: 3 things that contribute this: 1. Crap adaptors. 2. Bolts with small heads. 3. Landing backwards with the brake locked. Can see 1 and 2 in the photos, unsure about 3 but its worth thinking about when you ride. The bolts are stock Shimano ones. I learned from experience that for Shimano warranty, they care that you use their stock bolts. What adapter do you recommend? And yes, number 3 is something we gotta avoid. Coming from running rear rim brake all my life, I did not really think of it until now. Edited June 19, 2023 by Sam Song Quote Link to comment Share on other sites More sharing options...
Sam Song Posted June 19, 2023 Author Report Share Posted June 19, 2023 1 hour ago, Szymon said: And why washers under the caliper? This reduces the contact area. Washers are needed to clear the rotor. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted June 19, 2023 Report Share Posted June 19, 2023 Hmm. Bolts look like 'Risk' ones on at least one of the pictures? The older Magura ones are good. Or a normal cap head with a thick washer. Had good results with Hope adaptors. 3 Quote Link to comment Share on other sites More sharing options...
Sam Song Posted June 19, 2023 Author Report Share Posted June 19, 2023 4 hours ago, AdamR28 said: Hmm. Bolts look like 'Risk' ones on at least one of the pictures? The older Magura ones are good. Or a normal cap head with a thick washer. Had good results with Hope adaptors. I meant the stock shimano ones are the ones holding the brake caliper. Quote Link to comment Share on other sites More sharing options...
Sam Song Posted June 19, 2023 Author Report Share Posted June 19, 2023 (edited) 10 hours ago, AdamR28 said: Hmm. Bolts look like 'Risk' ones on at least one of the pictures? The older Magura ones are good. Or a normal cap head with a thick washer. Had good results with Hope adaptors. What difference would the titanium bolts holding the brake adaptor to the frame make? The head of the bolt is contacting the frame, so it would not affect the adaptor at all? Edit: Maybe you were looking at the last two photos and not the first one. I switched to stock shimano bolts after the first failure. Edited June 19, 2023 by Sam Song 1 Quote Link to comment Share on other sites More sharing options...
MaderaMark Posted June 20, 2023 Report Share Posted June 20, 2023 my experiences: Those washers in-between the adapters and calipers were un-avoidable since the rotor'edge hits the caliper. last piece i used and last the longest: Avid 185mm adapter, slips in smooth and clean, perfect clearance... Quote Link to comment Share on other sites More sharing options...
La Bourde Posted June 20, 2023 Report Share Posted June 20, 2023 If you have a clearance issue, this is because you use a wrong rotor/adapter combination. (Or your frame mount is off) Unfortunately, there are "metric" and "imperial" based dimensions (?) for rotor and adapter, with the exception of 160mm. So there are 180 and 185mm rotors, 200 and 203 (8"). Shimano uses metric dimensions, Avid not. Hope makes both. (Koxx had also a 190mm disc and matching fork...) 1 Quote Link to comment Share on other sites More sharing options...
Canardweb Posted June 20, 2023 Report Share Posted June 20, 2023 (edited) 9 minutes ago, La Bourde said: If you have a clearance issue, this is because you use a wrong rotor/adapter combination. (Or your frame mount is off) Unfortunately, there are "metric" and "imperial" based dimensions (?) for rotor and adapter, with the exception of 160mm. So there are 180 and 185mm rotors, 200 and 203 (8"). Shimano uses metric dimensions, Avid not. Hope makes both. (Koxx had also a 190mm disc and matching fork...) God do you remember that? How come they even tried 190? I feel so old now... Edited June 20, 2023 by Canardweb Quote Link to comment Share on other sites More sharing options...
La Bourde Posted June 20, 2023 Report Share Posted June 20, 2023 I bought a specific Hope rotor in 190mm, that was almost twice expensive as the normal one! Though I am not Scottish, can't forget that!🤣 1 Quote Link to comment Share on other sites More sharing options...
Canardweb Posted June 21, 2023 Report Share Posted June 21, 2023 I am surprised Hope even did some custom sized ones to be honest. Quote Link to comment Share on other sites More sharing options...
Sam Song Posted June 23, 2023 Author Report Share Posted June 23, 2023 On 6/20/2023 at 7:59 AM, La Bourde said: If you have a clearance issue, this is because you use a wrong rotor/adapter combination. (Or your frame mount is off) Unfortunately, there are "metric" and "imperial" based dimensions (?) for rotor and adapter, with the exception of 160mm. So there are 180 and 185mm rotors, 200 and 203 (8"). Shimano uses metric dimensions, Avid not. Hope makes both. (Koxx had also a 190mm disc and matching fork...) If you have to use a spacer to clear the rotor with an adapter, does not reduce the strength of the setup? Quote Link to comment Share on other sites More sharing options...
LEON Posted June 25, 2023 Report Share Posted June 25, 2023 (edited) After all the advice you were given last time you went and put the same weak caliper on the same flimsy adapter and got the same result? I'm stunned. Do you have money to buy a Saint brake every week but not £7 to buy a capable adapter? At this point you deserve it. Instead of questioning every experienced opinion you're offered, what about actually taking the advice? It's usually the same few people posting this topic and I contribute to nearly all of them. It's really quite a simple fix if you LISTEN. Also, I have never broken a caliper or an adapter. Just saying. Edited June 25, 2023 by LEON 1 Quote Link to comment Share on other sites More sharing options...
Sam Song Posted June 25, 2023 Author Report Share Posted June 25, 2023 (edited) 7 hours ago, LEON said: After all the advice you were given last time you went and put the same weak caliper on the same flimsy adapter and got the same result? I'm stunned. Do you have money to buy a Saint brake every week but not £7 to buy a capable adapter? At this point you deserve it. Instead of questioning every experienced opinion you're offered, what about actually taking the advice? It's usually the same few people posting this topic and I contribute to nearly all of them. It's really quite a simple fix if you LISTEN. Also, I have never broken a caliper or an adapter. Just saying. To be fair, last time it broke, I had upsized the rear rotor to 203mm then it broke on the first ride. I had actually ridden the bike perfectly fine for months on a 180mm rear rotor. The second time, I had downsized the rear rotor to 180mm because of that. At this point, I am not getting another Saint Brake. I am getting a North Shore Billet adapter which I am hoping would work better. I am going to stick with 180mm rotor in the back which should help too. Edited June 25, 2023 by Sam Song Quote Link to comment Share on other sites More sharing options...
MaderaMark Posted June 26, 2023 Report Share Posted June 26, 2023 7 hours ago, Sam Song said: To be fair, last time it broke, I had upsized the rear rotor to 203mm then it broke on the first ride. I had actually ridden the bike perfectly fine for months on a 180mm rear rotor. The second time, I had downsized the rear rotor to 180mm because of that. At this point, I am not getting another Saint Brake. I am getting a North Shore Billet adapter which I am hoping would work better. I am going to stick with 180mm rotor in the back which should help too. i do have the same experience with 203 rotors and no beefy adapters to match. After I went back to 180mm and with avid adapter, I am confident until now with my shigura deore/mt4 combo... Quote Link to comment Share on other sites More sharing options...
Sam Song Posted June 28, 2023 Author Report Share Posted June 28, 2023 (edited) I am looking forward to trying this! Edited June 28, 2023 by Sam Song 2 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.