Matt Vandart Posted October 5, 2011 Report Share Posted October 5, 2011 I was wondering which Hydro. Disc brakes would be good for all mountain riding. I am looking at formula atm but was wondering if cheaper alternatives are suitable. I would prefer ones with flip flop levers as I run my brakes arse backwards and cant be arsed with bleeding. Are Hope V2's suitable?. Also what size rotors? Thanks Quote Link to comment Share on other sites More sharing options...
Rockman Posted October 5, 2011 Report Share Posted October 5, 2011 Hope tech V2's would be good as they have large pistons and the levers are flip flop. Quote Link to comment Share on other sites More sharing options...
haydon_peter Posted October 5, 2011 Report Share Posted October 5, 2011 Shimano all the way Go for the SLX or XT brakes, they do not come with rotors so you would have to purchase rotors separately. If you get them from Rose Bikes who are based in Germany they will already be the 'wrong way' however it is likely you will have to shorten the hoses anyway. Some recent threads containing useful information can be found here: http://www.trials-forum.co.uk/topic/166090-disc-brake-recomendations/ http://www.trials-forum.co.uk/topic/167762-disc-brake-help/ Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted October 5, 2011 Author Report Share Posted October 5, 2011 (edited) Awesome, thanks for the replies dudes. Another question: I have a post mount frame and I want to run 185 rotors. What is the score with post mounts in regards to rotor sizes? Thanks EDIT: well I thought I did till I saw this: Please klik What is it on about in the sizing options? 180mm post mount 6" ??? Thanks again. Edited October 5, 2011 by Matt Vandart Quote Link to comment Share on other sites More sharing options...
craigjames Posted October 6, 2011 Report Share Posted October 6, 2011 Awesome, thanks for the replies dudes. Another question: I have a post mount frame and I want to run 185 rotors. What is the score with post mounts in regards to rotor sizes? Thanks EDIT: well I thought I did till I saw this: Please klik What is it on about in the sizing options? 180mm post mount 6" ??? Thanks again. Size of the rotor and the size of the rotor you'd be able to use without the need for an adaptor, pretty much the same as ISO, ISo +20 etc? So they can provide you with a 180mm rotor and the correct adaptor to allow you to use it with your frame. What bike are you running this on? I'd give another vote for the Shimano brakes, SLX and XT performs really well and is fairly good value for money. Grab a set of 2011 XT brakes if you really want to spend the money. Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted October 6, 2011 Author Report Share Posted October 6, 2011 Lolz, I dont really want to spend the money. Um so I gotta buy the rotor and adaptor and calliper/lever separately? I cant seen to find the adaptors Quote Link to comment Share on other sites More sharing options...
haydon_peter Posted October 7, 2011 Report Share Posted October 7, 2011 If you tell us what bike it is for and what forks you are running we might be able to tell you what you need, it would also help to know what size rotors you are planning to run... Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted October 7, 2011 Author Report Share Posted October 7, 2011 The forks are not a problem, it's for the frame which is a giant trance x. I'm not sure which rotors I am going to run, hence the thread. Thanks Quote Link to comment Share on other sites More sharing options...
haydon_peter Posted October 7, 2011 Report Share Posted October 7, 2011 The Shimano brakes should come with an adaptor that is the correct size to run a 160mm rotor on the rear. 160mm on the back brake should be more than enough however I would run a 180mm rotor on the front, you will probably need to buy an adaptor for the front brake separately but the adaptor you need depends on the type of mount that is on the forks (although they are highly likely to be post mount). I have run Shimano XT brakes 180mm front and 160mm rear on my Commencal for 3 years and they have never let me down! They even coped with a week of riding long descents in the Alps! Quote Link to comment Share on other sites More sharing options...
Tomm Posted October 7, 2011 Report Share Posted October 7, 2011 I need some new brakes, was just waiting to get paid for the Rosebikes deal but they're out of bloody stock now. Cheapest I can find is £180 for a set, grrrr. Still, way cheaper and better than anything else. Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted October 8, 2011 Author Report Share Posted October 8, 2011 Cool. Thanks Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted October 13, 2011 Author Report Share Posted October 13, 2011 Ok I got Hope V2's and I am having problems with the rear rotor, seems you cant get a 160mm one. So how do I fit a 183mm rotor? Befaore anyone gets clever, there does not appear to be any post mount adaptors for increasing the rotor size for the rear. Quote Link to comment Share on other sites More sharing options...
Tomm Posted October 13, 2011 Report Share Posted October 13, 2011 Isn't a V2 just a standard post mount? Is the frame IS? Assuming it is (most are), then you need an IS to 180mm (rear) post mount, it doesn't need to be Hope but I'm sure they do them. You should be able to use a 160mm disc, again this doesn't have to be a Hope one, unless you want the fancy vents. The only complicated thing is that Hopes use 183mm diameter rotors but *I think* 180mm adaptors. There's an extra '+3mm' built into the calliper itself. This doesn't usually cause problems as the radius is only 1.5mm bigger so it shouldn't rub. Even if you use another manufacturer's 180mm discs it should work fine. Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted October 13, 2011 Author Report Share Posted October 13, 2011 (edited) It's a post mount frame, this is the issue After a bit o basic measuring I rekon the post mount on the frame is in the same position relative to the axle as the post mount on the fork. This would be good. I did think of using other discs, I have some hope xc ones here, but the braking surface is too narrow V2 uses the same size pad as the mono trial, just different shape pad, big f**kers. Edited October 13, 2011 by Matt Vandart Quote Link to comment Share on other sites More sharing options...
Tomm Posted October 13, 2011 Report Share Posted October 13, 2011 It's a post mount frame, this is the issue After a bit o basic measuring I rekon the post mount on the frame is in the same position relative to the axle as the post mount on the fork. This would be good. I did think of using other discs, I have some hope xc ones here, but the braking surface is too narrow V2 uses the same size pad as the mono trial, just different shape pad, big f**kers. What frame is it? And what discs are you running on it at the moment? It's quite unlikely that the mount is the same as the forks. Front post mount = 160mm in 95% of cases, if you run a bigger disc you'll need a +20mm or +40mm adaptor. I think a 'standard' rear post mount would actually be for 140mm, but some frames are built so the mounts work for 160 or 180 mm discs. Basically you need to find what size rotor the frame was designed for and just bolt the caliper directly onto the frame, either that or get a +20mm adaptor. Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted October 14, 2011 Author Report Share Posted October 14, 2011 The frame is a giant Trance x 2011 I am running no discs atm because this is a new build. The discs I have are Hope V2's as described above. The standard bike runs a 160. The problem is you cant get a 160mm rotor for the V2. I cant use a different 160mm rotor as described (I think) the only other disc that would have a wide enough braking surface would be a mono trial rotor. Mono trial have a habit of not dealing with heat which I believe is caused by the rotor design. It seems you cannot buy Post mount to post mount + adaptors specifically for the rear, or I cant find any. I have measured the mounts position relative to the axle on both the front and the back. These measurements appear to be the same unless I have missed something obvious. I am going to try using a +20 FRONT post to post adaptor to see if it works. Quote Link to comment Share on other sites More sharing options...
haydon_peter Posted October 14, 2011 Report Share Posted October 14, 2011 If the mounts on the frame look like this then it isn't post mount... Like Tom has said, you will need a IS to 180mm post mount adaptor to run a 180mm rotor. Any half decent bike shop will have what you need and it should only be £5-£10 Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted October 14, 2011 Author Report Share Posted October 14, 2011 Ah but, the mounts don't look like that, they are post mount. Quote Link to comment Share on other sites More sharing options...
haydon_peter Posted October 14, 2011 Report Share Posted October 14, 2011 Ah OK, I'm not able to help any further then, I cannot figure out which adaptor you would need from CRC so I think you should go and ask in a decent bike shop. Kind of off topic but why does everything have to be post mount now? I just do not get it, it just means more threads in the frame/forks to worry about stripping! This summer I managed to strip one of the post mounts on my Rockshox Totem forks so I had to use a longer bolt to reach the good thread further inside the mount. At least with IS to post mount on the back you only have to worry about the threads on a cheap to replace adaptor! I guess I was just unlucky that the mounts on the Totems are already 203mm so you are bolting the calliper directly to the mount on the forks. Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted October 14, 2011 Author Report Share Posted October 14, 2011 I agree, however post mount is better in terms of reaction and that. Seems it is going to be standard over the next couple of years. All the bike shops I have asked have been stumped also, same reaction, they think I am stupid and its ISO on the back Quote Link to comment Share on other sites More sharing options...
Rockman Posted October 14, 2011 Report Share Posted October 14, 2011 long bolts and spacers? ghetto style. Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted October 14, 2011 Author Report Share Posted October 14, 2011 Considered this. Quote Link to comment Share on other sites More sharing options...
Rockman Posted October 14, 2011 Report Share Posted October 14, 2011 Work or not? 1 Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted October 14, 2011 Author Report Share Posted October 14, 2011 Havn't tried it yet waiting for discs to turn up. Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted October 14, 2011 Author Report Share Posted October 14, 2011 (edited) Ok, I'm pretty sure I can sort this out, my next question is: Do you think I am asking for trouble putting a V2 with a 183mm rotor on this bike in terms of frame crackage? Sorry, turns out its a 2012. Edited October 14, 2011 by Matt Vandart 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.