Mr Dave Posted March 12, 2007 Report Share Posted March 12, 2007 Hellomates got a white adamant a2, with tapered middle burns. 127.5mm bottom bracket.Koxx rear rim (wide one)and a Maggie. when he pedals hard his right hand crank hits on the brake caliper... so obviously the bb ain't long enough. but we cant find a longer one?what have other people done???Dave ta Quote Link to comment Share on other sites More sharing options...
MikeCottTrials Posted March 12, 2007 Report Share Posted March 12, 2007 middleburns are 175mm long if im not mistaken so get some 170 cranks Quote Link to comment Share on other sites More sharing options...
Mr Dave Posted March 12, 2007 Author Report Share Posted March 12, 2007 5mm wont make enough diff. and his not guna spent 150 quid or what ever they are, when it could be solved by a special bb for a 10er lol. thanks anywayanyone else??Dave Quote Link to comment Share on other sites More sharing options...
LEON Posted March 12, 2007 Report Share Posted March 12, 2007 I told u dave, his square taper is probably exessively worn resulting in the inwards movement of his cranks arms Leon Quote Link to comment Share on other sites More sharing options...
JoNnY__Mc Posted March 12, 2007 Report Share Posted March 12, 2007 I told u dave, his square taper is probably exessively worn resulting in the inwards movement of his cranks arms Leonthis sounds like the problem to me what he needs to do is put some metal strips in between the bb and the cranks when he is tightening the cranks on... if you get what i mean? quick bodge for when he can afford some new burns Quote Link to comment Share on other sites More sharing options...
Egg Fried Rice Posted March 12, 2007 Report Share Posted March 12, 2007 (edited) hmmm.....i have an A2 and im just looking at it now.i think if i had any other cranks they would hit the maggies but im using echo forged 05 cranks 170mm and they kind of come away/stick out from the frame quite a bit than other cranks. i dont think you will understand what i said lolIm also using a 127.5 BBJK Edited March 12, 2007 by J-KAY Quote Link to comment Share on other sites More sharing options...
Mr Dave Posted March 12, 2007 Author Report Share Posted March 12, 2007 yeah id forgotten that Leon lol, its still guna be close though!Davebut just to clarify, there arnt any longer tapered bbs than 127.5 ? Quote Link to comment Share on other sites More sharing options...
Joe Papasnap Maher Posted March 12, 2007 Report Share Posted March 12, 2007 thats what u get when u use them shitty koxx rims. Quote Link to comment Share on other sites More sharing options...
JoNnY__Mc Posted March 12, 2007 Report Share Posted March 12, 2007 yeah id forgotten that Leon lol, its still guna be close though!Davebut just to clarify, there arnt any longer tapered bbs than 127.5 ?You can buy 131 ones I think... possibley longer, but how long they last I dont know Quote Link to comment Share on other sites More sharing options...
coolbeen Posted March 12, 2007 Report Share Posted March 12, 2007 My brother had this problem all we did was hit it a bit to make it come out that little bit more. I know the crank won't be as strong, but it works Quote Link to comment Share on other sites More sharing options...
Egg Fried Rice Posted March 12, 2007 Report Share Posted March 12, 2007 (edited) I think u can get longer ones, but there made for like hardcore downhill bikes with lots going on around the crank area or something like that. I cant remember exactly why but it was something on the lines of that.JKEDIT: 131mm bottom bracketsI dunno how strong they are but at least there available. Edited March 12, 2007 by J-KAY Quote Link to comment Share on other sites More sharing options...
CurtisRider Posted March 12, 2007 Report Share Posted March 12, 2007 how much room has his left crank got from the caliper? if he has a few mm spare, he could put a spacer on the right hand cup on the bb, which would move it accross a bit? worth a try, had to do it on a mates bike when we didn't have a wide enough bb to hand to allow the chain ring to clear the framethat 131mm bb would be a better idea though, for a tenner you cant grumble! even if you have to replace it every 6months or whatever (if it doesn't fail before then)alternatively, less pad material or a slimmer rim... Quote Link to comment Share on other sites More sharing options...
hopper22 Posted March 12, 2007 Report Share Posted March 12, 2007 (edited) iv'e got an a2, and i run burns and i have the same issue, i've just got my 131 bb though im hoping this is going to solve the problem, was gonna put it on tomorow i'll let you know if it works as soon as i know.EDIT just fitted the bb, and it does clear, only by about 3mm though, my wheels are being rebuilt at the moment i cant say that it will clear when my rear wheel is in and my maggys are set up, i wont know that till wednesday. Edited March 12, 2007 by hopper22 Quote Link to comment Share on other sites More sharing options...
Ash-Kennard Posted March 12, 2007 Report Share Posted March 12, 2007 get some try-a;; cranks, very thin and very strong, will not hit Quote Link to comment Share on other sites More sharing options...
Krisboats Posted March 12, 2007 Report Share Posted March 12, 2007 how much room has his left crank got from the caliper? if he has a few mm spare, he could put a spacer on the right hand cup on the bb, which would move it accross a bit? worth a try, had to do it on a mates bike when we didn't have a wide enough bb to hand to allow the chain ring to clear the framethat 131mm bb would be a better idea though, for a tenner you cant grumble! even if you have to replace it every 6months or whatever (if it doesn't fail before then)alternatively, less pad material or a slimmer rim...I'd go with the drive side spacer idea first as well... your gonna have to take your bb out to fit the new one anyway, may as well get the toold and while takign the old one out see if spacers are enough to do the trick.My t-rex has a couple of driveside spacers. Works fine. Quote Link to comment Share on other sites More sharing options...
James Quigley Posted March 12, 2007 Report Share Posted March 12, 2007 I had the same problem with burns on my GU, got some try-all cranks and problem solved.They sweep out a bit more. Quote Link to comment Share on other sites More sharing options...
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