Will Arnold Posted August 11, 2007 Report Share Posted August 11, 2007 if i wer you, i'd run dual hope trials off one lever, the lever wont pull to far, as the return is govourned by the lever, not the pistons. however, the disc will probarbly rub slightly more than usual, but if you set them up really well, it shouldnt be a problem. Quote Link to comment Share on other sites More sharing options...
Has anyone seen my shoe? Posted August 11, 2007 Report Share Posted August 11, 2007 I seriously think the best thing luke can do is go cable. Quote Link to comment Share on other sites More sharing options...
Onza Kieron Posted August 11, 2007 Report Share Posted August 11, 2007 Please don't get hydro brakes, it just won't work properly. Double 8" BB7's set up with minimal drag (both pads touching the disc) and a bmx lever with an extended lever blade, you can't go wrong with that and it will be super powerful!I agree with that. Quote Link to comment Share on other sites More sharing options...
Bionic Balls Posted August 11, 2007 Report Share Posted August 11, 2007 any progress? got a frame yet? Quote Link to comment Share on other sites More sharing options...
1handedluke Posted August 11, 2007 Author Report Share Posted August 11, 2007 (edited) Inur Posted Today, 04:19 PM Please don't get hydro brakes, it just won't work properly. Double 8" BB7's set up with minimal drag (both pads touching the disc) and a bmx lever with an extended lever blade, you can't go wrong with that and it will be super powerful!1st off, it wouldn't work with a bmx lever, because they don't pull as much as mountain bike lever, plus if i was going to go double discs i'd need a new frame etc, which seems a waste of money atm as i just got this mint adamant and no one seems to want to swap , but it could get it working with a normal avid lever i would just extend the lever, and use the cable spliiter that i posted up earlier. because if i use double disc, it would be twice as stiff to pull as a normal brake, so i'd have to double the lever power to double the strength! see the big problem here is that i'm going to need new wheel sets and a new frame which all costs money that i haven't got atm!a magura piston is 12-13mm, if you double the diameter it will become 19mm, so this 18mm lever should work just as well as one magura lever on one brake(doubleing the lever size for 2 brakes) , of course the lever has also been extended if you look, so this should in theory work just as well as the normal magura! as the diameter is twice as big it will be pushing twice the amount of water per square inch! i've ordered the lever, so if this doesn't work then ill try double cable discs , if someone could explain better what im trying to explain then please do Edited August 11, 2007 by 1handedluke Quote Link to comment Share on other sites More sharing options...
Tomm Posted August 11, 2007 Report Share Posted August 11, 2007 Presumably, if you're using one lever, you need to think about which brake engages first. If you used a cable disc and one brake engaged a lot before the other, the other one wouldn't ever come on. Which would be bad. But BB7s have the red adjusters and everything so it would probably be pretty easy to see them up so they both come on at the same time. Alternatively, by using a closed brake system like maguras, it won't really matter which brake engages first. So that sounds like a decent option. I'm not convinced that you've done your sums right, though. If you are saying that a a magura piston is 12mm diameter, you'd get DOUBLE the surface area with a 17mm piston - sqrt(2(12^2)). But the 18mm piston is pretty close to 17mm so it may work, perhaps it would be slightly more wooden. If you make a longer lever, it ought to work well. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted August 11, 2007 Report Share Posted August 11, 2007 Magura levers are 14mm as standard Quote Link to comment Share on other sites More sharing options...
1handedluke Posted August 12, 2007 Author Report Share Posted August 12, 2007 14m = 18-19? mm right, i did work it out somewhere and ether 18,19 was the best size? when i was going to get a lever built, me and don't you just hate it when... worked it out! but it was going to cost to much Quote Link to comment Share on other sites More sharing options...
Tomm Posted August 12, 2007 Report Share Posted August 12, 2007 14mm doubled --> 19.8mm according to my calculations. Quote Link to comment Share on other sites More sharing options...
abe Posted August 12, 2007 Report Share Posted August 12, 2007 in sports motorbikes two discs are linked at the front via one lever, how are they different to discs on bikes? is it to do with open and closed systems? Quote Link to comment Share on other sites More sharing options...
Has anyone seen my shoe? Posted August 12, 2007 Report Share Posted August 12, 2007 14mm doubled --> 19.8mm according to my calculations.Dur! Its 28mm n00b! You dont need a new frame luke if you go dual disc. Make an adapter! Quote Link to comment Share on other sites More sharing options...
Tomm Posted August 12, 2007 Report Share Posted August 12, 2007 Dur! Its 28mm n00b! STFU. I know you know what I meant. Quote Link to comment Share on other sites More sharing options...
Bionic Balls Posted August 12, 2007 Report Share Posted August 12, 2007 i also make it 19.8mm...but didn't RB levers have a different piston size? what i mean is...it can't matter too much...i hope.adam Quote Link to comment Share on other sites More sharing options...
Bearded Midget Posted August 12, 2007 Report Share Posted August 12, 2007 i simply hope you get a lever working man, as i dont know what you are all on about with 19.8 so i will leave the smart talk to you lot and just say good luck with the new lever Quote Link to comment Share on other sites More sharing options...
Captain Scarlet Posted August 12, 2007 Report Share Posted August 12, 2007 If the Magura doesn't work, I agree with what someone else said about using Vee's, you run a disc on the front and Vee on the rear, without having to worry about mounts, and it can be made to work just as well as Magura can. Quote Link to comment Share on other sites More sharing options...
Has anyone seen my shoe? Posted August 13, 2007 Report Share Posted August 13, 2007 i simply hope you get a lever working man, as i dont know what you are all on about with 19.8A 19mm piston gives double the surface area compared to a 14mm one! Simple enough! Quote Link to comment Share on other sites More sharing options...
1handedluke Posted August 13, 2007 Author Report Share Posted August 13, 2007 A 19mm piston gives double the surface area compared to a 14mm one! Simple enough!yeah 18-19 close enough yeah if this maggie lever don't work it will be duel discs, i know how to make the system its just adapting the frame? any idea how? Quote Link to comment Share on other sites More sharing options...
Has anyone seen my shoe? Posted August 14, 2007 Report Share Posted August 14, 2007 I can help you with that, actually thinking about it ill ask inur how he did it first, just to make sure im right haha Quote Link to comment Share on other sites More sharing options...
1handedluke Posted August 16, 2007 Author Report Share Posted August 16, 2007 new lever feels wank it rubs and still won't lock when going to front wheel! any idea how to adapt my frame then? Quote Link to comment Share on other sites More sharing options...
RobinJI Posted August 17, 2007 Report Share Posted August 17, 2007 (edited) What set-up are you running on the rear? Idealy you want it to be as stiff as possible to transfer pleanty of power to the front, otherwise it'll just let the front move. Braided hose, heatsink/echo control booster, denge CNC clamps, koxx browns ect ect... Edited August 17, 2007 by Dont you Just Hate it When... Quote Link to comment Share on other sites More sharing options...
1handedluke Posted August 17, 2007 Author Report Share Posted August 17, 2007 (edited) inter boosteron rear without a booster koxx browns, fronts got a echo 4 bolt booster plaz pads and uber sharp grind, but its the front that seems to be spongey, fork flex still! Edited August 17, 2007 by 1handedluke 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.