nathie wafie Posted September 22, 2010 Report Share Posted September 22, 2010 (edited) Just after some feedback of those few people who have had rear disk on stock. I'm unsure what rotor size is normally suggested. I'm guessing around 180/190mm? Pretty sure 160mm would be to small. I weigh about 76kg if that makes any difference.... Any suggestions would be helpfull. Nath Edited September 22, 2010 by nathie wafie Quote Link to comment Share on other sites More sharing options...
N.Wood Posted September 22, 2010 Report Share Posted September 22, 2010 I had a 190mm mono trial out backs on my Yaabaa for about 3 months. I found it was good for some situations (static hooks and rounded rocks) and bad for others (street and sharp edges). Was good for arm pump, but I got rid of it mainly for the weight implication and spoke flex. Kinda felt a bit 'detached' compared to a maggie. Quote Link to comment Share on other sites More sharing options...
nathie wafie Posted September 22, 2010 Author Report Share Posted September 22, 2010 Flex is something im worried about, is it really that bad? Would be along the lines of a Tryall H disk rear hub, holes rim setup. Quote Link to comment Share on other sites More sharing options...
N.Wood Posted September 22, 2010 Report Share Posted September 22, 2010 I had it on that rim and hub on a questionable build and it was never as bad as I thought it would be to be honest. I did find it slightly harder on very small (like less than 10cm square) tech pointed rock sections as it was a bit harder to know where your rear wheel was. This is something you'd probably get used to. Quote Link to comment Share on other sites More sharing options...
Mark W Posted September 22, 2010 Report Share Posted September 22, 2010 That 'feel' thing is something you get used to. I had it on my mod going from a baller HS33 setup to a Mono Trial, and you do get used to the feel of disc. As long as your spokes aren't flapping around or anything the spoke flex shouldn't feel too bad. Adam's DD stocks always feel pretty positive/responsive, so should be fine 190mm or 200mm would be best, rotor-wise. Quote Link to comment Share on other sites More sharing options...
thinkdougie Posted September 22, 2010 Report Share Posted September 22, 2010 dont do it. Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted September 22, 2010 Report Share Posted September 22, 2010 I had a 160mm hope on a planet x jack flash, it worked well most of the time but did slip out once, with disastrous results, it hurt enough for me to f**k it off and go vee. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted September 22, 2010 Report Share Posted September 22, 2010 I had a 160mm hope on a planet x jack flash, it worked well most of the time but did slip out once, with disastrous results, it hurt enough for me to f**k it off and go vee. That's because your rotor was at least 30mm too small Quote Link to comment Share on other sites More sharing options...
N.Wood Posted September 22, 2010 Report Share Posted September 22, 2010 For the sake of like £60 I'd say its worth a try, can always punt the brake on if you don't like it. Other advantages; No grinding, good in the wet/mud, makes you seem smoother, dont have to piss about grinding if you get a puncture/new tyre, easy to take wheel out,and good for rolling moves/manuals. Quote Link to comment Share on other sites More sharing options...
LordMersey Posted September 22, 2010 Report Share Posted September 22, 2010 (edited) Im currently running double disc and even though Ive got an old 05 hope mono I think I still much prefer it to my hs33 which I never got on well with. Edit sorry forgot to add I use front and back 180 Edited September 22, 2010 by LordMersey Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted September 22, 2010 Report Share Posted September 22, 2010 That's because your rotor was at least 30mm too small Indeedy it was but it was what I had at the time. For the most part it worked well only on long pedal gaps where u got the momentum up it was dodgey. Pedal gapped from a platform to a log about 2 ft off the ground and it just whipped out from under me probably because I over extended to reach it. Fell right on my back on the log and the bike landed in my nuts, f**king lost my nerve since then probably to this day, lol Rotor size is surely becoming a moot point seeing some of the stuff people are doing with nay brakes? More of an excuse eh. While I'm on the subject of pedal gaps (as in rolling gaps) why did I find it easier to do this move on an old school planet x and find it so hard on my up to date geo echo? Any ideas? Sorry if this is not relevant to your topic Nathan. Quote Link to comment Share on other sites More sharing options...
Mark W Posted September 22, 2010 Report Share Posted September 22, 2010 Rotor size is surely becoming a moot point seeing some of the stuff people are doing with nay brakes? If you don't have brakes, you don't expect them to work a certain way and so you don't plan your riding around that knowledge of your bike. If you've got a brake, you'd expect it to work in a certain way so you know what you can/can't do - if your brake doesn't meet your expectations because your rotor's too small (in this instance), then it's liable to messing you up. As you found While I'm on the subject of pedal gaps (as in rolling gaps) why did I find it easier to do this move on an old school planet x and find it so hard on my up to date geo echo? Most older style bikes were better for two wheeled moves like rolling gaps, compared to modern bikes which basically designed to be pogo sticks. Front end height will have a big impact on it too though, so if your front's relatively low then that'll make it feel worse for them. Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted September 22, 2010 Report Share Posted September 22, 2010 Ah I see, thanks Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted September 22, 2010 Report Share Posted September 22, 2010 Egg-sactly. It sucks, I think he's going for a Monty Quote Link to comment Share on other sites More sharing options...
craigjames Posted September 22, 2010 Report Share Posted September 22, 2010 I wonder what the available frames are actually..Quick look on tarty reveals 3/4 stocks, all over 1090mm wb though and me being a short arse I need something like a 1075mm + 30mm bb sort of geo..Of which there are none with a rear disc mount. How tall are you? Being around the 5'8 mark my limey came out at around 1085 +35 with Rockman forks, it's pretty much down to finding a suitable stem and bar combo to get the reach right. When I was running disc on the rear of my bionic a few years ago I used a 200mm rotor with a BB7 calliper. Wasn't as solid feeling at the lever as a hope or a magura, nor did it have the bite and hold of either, it was good, but not that good. Wheel flex wasn't that noticeable although I am a little lighter than you at 70Kgs. Should be all right with a decent disc brake and wheel build. Quote Link to comment Share on other sites More sharing options...
Greetings Posted September 22, 2010 Report Share Posted September 22, 2010 Don't do it. Flex is unbearable. Quote Link to comment Share on other sites More sharing options...
forteh Posted September 22, 2010 Report Share Posted September 22, 2010 I had a 185 bb7 on the rear of the triton for a little while. The bite was reasonable, nowhere near that of a maggie but still pretty good for a disk. The hold was worthless, actually I mean less than worthless, it wasnt capable of holding a boon up two pallets The silence was glorious though The flex wasnt too bad, I could certainly live with it, as said it felt a little detached but you get used to it. Quote Link to comment Share on other sites More sharing options...
Mark W Posted September 22, 2010 Report Share Posted September 22, 2010 Don't do it. Flex is unbearable. Depends how you do it. Adam's brake on his Hydroxx and GU felt really nice. Definitely not 'unbearable', and it's a feel that you get used to quite quickly. It does take a bit of getting used to and it's probably not really for everyone, but it's not 'unbearable' unless your wheels are in a pretty shocking state. Quote Link to comment Share on other sites More sharing options...
Matt Vandart Posted September 23, 2010 Report Share Posted September 23, 2010 Depends how you do it. Adam's brake on his Hydroxx and GU felt really nice. Definitely not 'unbearable', and it's a feel that you get used to quite quickly. It does take a bit of getting used to and it's probably not really for everyone, but it's not 'unbearable' unless your wheels are in a pretty shocking state. Or you are a queer. Quote Link to comment Share on other sites More sharing options...
nathie wafie Posted September 23, 2010 Author Report Share Posted September 23, 2010 It'll be on a Kamel frame for now.... Thanks for all the feedback guys. I'll keep the magura setup if it doesn't work. I decent wheel build and 190mm set-up and i think im onto a winner. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted September 23, 2010 Report Share Posted September 23, 2010 I'm around 90% sure you won't be able to run anything larger than 160 on the Kamel frame without (huge, flexy, heavy, horrible) adaptors. In my experience, it won't be worth trying as either running a 160 (underpowered) or using a 180/200 (flexy) will leave you disappointed Quote Link to comment Share on other sites More sharing options...
nathie wafie Posted September 23, 2010 Author Report Share Posted September 23, 2010 I'm around 90% sure you won't be able to run anything larger than 160 on the Kamel frame without (huge, flexy, heavy, horrible) adaptors. In my experience, it won't be worth trying as either running a 160 (underpowered) or using a 180/200 (flexy) will leave you disappointed Shizzle i feared that as it has a standard mount.... Maybe have to stick to the magura then! Side note.... Ad's will you guys be getting any Monty clothing in? Shorts mainly. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted September 23, 2010 Report Share Posted September 23, 2010 Good plan dude! We don't plan to (they are about £80...) but could probably special order them if you give us a ring. Quote Link to comment Share on other sites More sharing options...
Greetings Posted September 23, 2010 Report Share Posted September 23, 2010 Depends how you do it. Adam's brake on his Hydroxx and GU felt really nice. Definitely not 'unbearable', and it's a feel that you get used to quite quickly. It does take a bit of getting used to and it's probably not really for everyone, but it's not 'unbearable' unless your wheels are in a pretty shocking state. If you like jelly then yes, it's probably nice. I get pissed off even by fork flex which is why I don't run a disc on the front wheel. Quote Link to comment Share on other sites More sharing options...
eep803 Posted September 23, 2010 Report Share Posted September 23, 2010 (edited) Bit of a hijack but do many people here ride a bit of trials on full sus bikes while out trail riding. I love the crossover and always try to throw a bit of trials into my trails riding. I have a spesh enduro with 5" of travel, not a trials bike by any stretch of the imagination. I have deore m525 hydraulic disk brakes on the rear with a 160mm rotor, I've always been impressed by these brakes, a bit like they punch above their weight in the same way as bb5s seem to. I'm wondering how much better a hope trial with a 180/200 rotor on the back would be or would I just tear my spokes out, maybe not given the give in the suspension. Don't get me wrong, I'm not gapping 5 foot on this, but given the topic was wondering peoples thoughts. Cheers, Skinny Bit of an edit, just read in the hope trial/moto thread that the trial doesn't like heat so is not suitable for an xc/dh bike - ah well, nice to have been saved £150. General thoughts on trials meets trails would be good. Edited September 23, 2010 by eep803 Quote Link to comment Share on other sites More sharing options...
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