PaRtZ Posted April 14, 2007 Report Share Posted April 14, 2007 as youre probably aware fred savage was kind enough to furnish me with a lovely this lovely new frame. Well heres why you have no pictures of me riding it80% of the reason i bought it was to run rear disc. So i thought I could just swap bits over from my dual disc megamo over to it... So i plonked my wheel in and it was too narrow. well im sure it was an odd sized hub (bikegas hub) so i bought a brand new one from tarty (monty hub) fits fine however when it comes to the disc the only thing that comes to mind is "wtf" . seriously no jokeFor a start theres no customisation with the chain length, because at the very back of the dropout the disc (when mounted) does not have 100% contact with the pads, meaning when the brake is applied, the pads form a pyramid shape. The answer is the move the wheel back in the dropout but like I said, thats when the wheel is right at the back.this was using a 160mm mono trial. So i thought maybe im being silly, and besides i much prefer mechanical disc brakes so again, i splashed out on a new avid 185mm BB7 thinking the extra 5mm is what I needed. Again, I was wrong, even after removing some washers to bring the caliper lower, its still about 3-4mm too high, forming this pyramid shape. So as you can imagine im a bit annoyed. I was having a problem with the spacing in the dropout too, but I think I ca sort that anyway, and probably it being a monty hub its too narrow anyway so thats easy to do, but Im still 100% baffled as to what I have to do to solve the pyramid-shape-pad-problem. Obviously the extreme aswer is to get a custom mounting bracket machined, but surely it should be made to make standard disc brakes? so im a bit peeved to be honest. £600 and I still don't have a bikeAny answers or suggestions no matter how dodgy/bodgy will be appreciated. Thanks in advance Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted April 14, 2007 Report Share Posted April 14, 2007 Any chance of a few pics Matt? How old's your chain? Which model of chain is it? What gear ratio are you running?CheersAdam Quote Link to comment Share on other sites More sharing options...
PaRtZ Posted April 14, 2007 Author Report Share Posted April 14, 2007 (edited) Yeah ill get some pictures now adam, its 18:12 the chain is quite new (so will stretch bringing the disc even further out))EDIT: some pictures here: Edited April 14, 2007 by PaRtZ Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted April 14, 2007 Report Share Posted April 14, 2007 Hmm, the disc/rotor contact area looks ok with that Avid. I take it the Mono Trial was worse?When you say 'forms a pyramid', I can't quite work out what you mean there... any chance of a diagram?Cheers again Quote Link to comment Share on other sites More sharing options...
Waddy Posted April 14, 2007 Report Share Posted April 14, 2007 would it work if you used a 180mm post mount adaptor instead of a 185.... Quote Link to comment Share on other sites More sharing options...
PaRtZ Posted April 14, 2007 Author Report Share Posted April 14, 2007 best i can do Quote Link to comment Share on other sites More sharing options...
Walleee Posted April 14, 2007 Report Share Posted April 14, 2007 your disc wont compress like you've illustrated, I'd have thought the pad's would wear straight just with a groove where they havn't been touched by the rotor. does the brake function allright?That build is absoutley fantastic, bar the cranks, I have a set of silver monty cranks and a try-all freewheel for sale if your interested? Quote Link to comment Share on other sites More sharing options...
PaRtZ Posted April 14, 2007 Author Report Share Posted April 14, 2007 . does the brake function allright?no? sorry i thought i made that bit clear....The brake is spongy, and even on its tightest setting in wont hold me on the back wheel Quote Link to comment Share on other sites More sharing options...
Burton Posted April 14, 2007 Report Share Posted April 14, 2007 Ill probably sound daft....but....does the caliper and disk hit all slanted? If sooo, you could bend the rotor to suit, or uses washers on the rotor? Quote Link to comment Share on other sites More sharing options...
Biff... Posted April 14, 2007 Report Share Posted April 14, 2007 Yeah ill get some pictures now adam, its 18:12 the chain is quite new (so will stretch bringing the disc even further out))EDIT: some pictures here:tht actual disk mount looks alot different to the standard avid mounts urs is all round and gay and the one nigel had on his monty was real blocky and strong looking and he had the same problem with you on his monty he just set it up propaly to the rotor like tht and it work neva sliped on him once and didnt rub Quote Link to comment Share on other sites More sharing options...
mat hudson Posted April 14, 2007 Report Share Posted April 14, 2007 play around with the spacers on the avid, you can put more in/take some out. Quote Link to comment Share on other sites More sharing options...
PaRtZ Posted April 14, 2007 Author Report Share Posted April 14, 2007 play around with the spacers on the avid, you can put more in/take some out.honestly weve looked it wont go in anymore the only thing left is to grind the mount away so theres less thread...... but maybe not Quote Link to comment Share on other sites More sharing options...
mat hudson Posted April 14, 2007 Report Share Posted April 14, 2007 why not et yourself a bigger rotor then? Quote Link to comment Share on other sites More sharing options...
PaRtZ Posted April 14, 2007 Author Report Share Posted April 14, 2007 well i tried the 160 caliper on the 185 disc and it was overkill. meaning i've got to get something inbetweenbut to be honest, why doesn't it fit normally? why didn't koxx just make it so that standard set-ups would work? Quote Link to comment Share on other sites More sharing options...
ManxTrialSpaz Posted April 14, 2007 Report Share Posted April 14, 2007 why didn't koxx just make it so that standard set-ups would work?Cus they're French? Quote Link to comment Share on other sites More sharing options...
mat hudson Posted April 14, 2007 Report Share Posted April 14, 2007 165? or shimano do a 170 Quote Link to comment Share on other sites More sharing options...
omgnoseat Posted April 14, 2007 Report Share Posted April 14, 2007 Looks like a great bike, too bad that the disc thingy is done so bad =/I hope this will put marco grosenik off his hydroxx and goes back to monty Like you should do aswell:P Quote Link to comment Share on other sites More sharing options...
Tomm Posted April 14, 2007 Report Share Posted April 14, 2007 I see what you're saying but from this picture the pads look spot on? How come you got it early? Is it some pre-production model or something? Quote Link to comment Share on other sites More sharing options...
hugh_b Posted April 15, 2007 Report Share Posted April 15, 2007 i can understand what you mean about the pyramid shape bud, sounds like the disk is know where near far enough into the calliper. If i were you i would ring koxx and explain the situation. They were talking about the possible problems with this frame on otn. How exactly do they expect you do ajust the chain but the calliper not move with the position that it's in?? -Hugh Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted April 15, 2007 Report Share Posted April 15, 2007 How exactly do they expect you do ajust the chain but the calliper not move with the position that it's in?With a standard mod bike gear ratio (which 99% of people run anyway), the stays always come out to 362-363mm length, that 1mm isn't enough to upset the brake rotor. It works great on Montys after all Matt - have a look here: http://www.hayesdiscbrake.com/pdf/Rear%20QR%20IS.pdf and check the mounting holes are in the correct position on your frame.As Tomm said, it looks like the brake is spot on from the picture he quoted, but the alignment looks a bit squiff from another picture you posted. Is it definitely set up well? Any chance of a pic looking along the line of the rotor too? Quote Link to comment Share on other sites More sharing options...
PaRtZ Posted April 15, 2007 Author Report Share Posted April 15, 2007 (edited) ok all is sorted. Big thanks to will for thisThe answer is that the disc tab is already +20mm. meaning you can't run a 160mm rotor but you have to run a 160 caliper on a 185mm rotor because the caliper already has this +20mm from the frameWill got his 160mm (well a 185mm front which translates....yeah i wont confuse you) and we put it on the back to give us the 160mm caliper and it worked. We had room for movement too chain is now a normal length (dave the khe is back on) But we still had a problem...For some reason koxx have a MASSIVE weld on the chainstay/dropouts join meaning theres a big bulge on it....meaning the bracket cant sit flush on the dropout because this weld is on the way (its in contact with the bit which has the bolt thread in it, for the caliper to screw into) So we packed it out and needless to say, it was rubbing on the outside pad. Anyway a bit of b*****d filing later and it was good. Very very very close fit but a fit none the lessso a warning to anyone getting one. You have to run a 160mm mono trial and unless they've changed the design of the hopes, be prepared to fork out for a 180mm rotorWill post some pictures in the bike pictures section today. I sliced my finger open a bit so ive got a large bandage on so no silly drop gaps. also need to bed bb7 in but otherwise all good EDIT: ooop also snapped a tooth off my eno, any suggestions? Edited April 15, 2007 by PaRtZ Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted April 15, 2007 Report Share Posted April 15, 2007 Interesting!What's this distance Matt? If you get a second to measure...Cheers! Quote Link to comment Share on other sites More sharing options...
Tomm Posted April 15, 2007 Report Share Posted April 15, 2007 So this means that you basically need to buy a front disc? I.e. If you're using an Avid BB5 you'd just buy the front version. But with the Hope you need a left hand lever and a longer hose, but still technically a "front brake"? Quote Link to comment Share on other sites More sharing options...
PaRtZ Posted April 15, 2007 Author Report Share Posted April 15, 2007 So this means that you basically need to buy a front disc? I.e. If you're using an Avid BB5 you'd just buy the front version. But with the Hope you need a left hand lever and a longer hose, but still technically a "front brake"?it seems that way too. Another lad looked at the cable rooting? seems a bit tight and he said that a front caliper would be more out the wayany pictures will be up in a few minutes. Adam sorry Ill PM you with that measurements (and any others you want) tomoz had a good ride Quote Link to comment Share on other sites More sharing options...
Davetrials Posted April 16, 2007 Report Share Posted April 16, 2007 (edited) doesnt that bike come with tryall all hope brakes, arnt they EVER so slightly different to normal hopes as well?i no u cant use try all disc on normal forks, u need koxx forks.. Edited April 16, 2007 by Davetrials Quote Link to comment Share on other sites More sharing options...
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