CalRobbo341 Posted February 24, 2012 Report Share Posted February 24, 2012 (edited) This is the second time this has happened to me now! Right, I have these cranks but in 165mm, square taper and a different bash ring, and the first time after a while the left hand crank where the pedal goes the thread just disappeared, and just out testing my new booster and I put a new pedal in the other day and the thread has just gone, completely. Is it worth buying a tap and dye kit, or buy a new crank or unless anyone knows a good way of getting it to stay? Worse thing is I am meant to be riding Liverpool tomorrow Oh and I also have a spare right hand crank so could I use that instead of buying anything? Thanks Edited February 24, 2012 by Callumm Quote Link to comment Share on other sites More sharing options...
trialsbeginner Posted February 24, 2012 Report Share Posted February 24, 2012 mate! same thing happened to me!! Quote Link to comment Share on other sites More sharing options...
CalRobbo341 Posted February 24, 2012 Author Report Share Posted February 24, 2012 mate! same thing happened to me!! Proper gay as I have found one online but they never update there stock levels, have you done anything about it? Quote Link to comment Share on other sites More sharing options...
trialsbeginner Posted February 24, 2012 Report Share Posted February 24, 2012 yeahh basically i have an onza pro 2010 and i took my cranks off and the freewheel and bashring, bought a new crank and still waiting for it to come but i havent been on my bike for like 1 month because of moving and stuff Quote Link to comment Share on other sites More sharing options...
CalRobbo341 Posted February 24, 2012 Author Report Share Posted February 24, 2012 I have just gotten my last order from tarts, and then this happens fml. Quote Link to comment Share on other sites More sharing options...
Philly_Biker Posted February 25, 2012 Report Share Posted February 25, 2012 post a pic. If the threads are completely gone then there is no material to tap to the same size. Sounds like you need a new part. Could get someone to weld the hole shut then drill and retap it. Quote Link to comment Share on other sites More sharing options...
Revolver Posted February 25, 2012 Report Share Posted February 25, 2012 How are you putting in pedals to kill the threads? They don't need doing up particularly tight unless you pedal backwards a lot. They're made to do up when you pedal forwards. Quote Link to comment Share on other sites More sharing options...
CalRobbo341 Posted February 25, 2012 Author Report Share Posted February 25, 2012 (edited) I do pedal backwards quite a lot and I am doing a welding course in college but I don't want to go through that much trouble, my next questions is could I use a right hand crank (the one that you put the free wheel on)? It also may look like they have thread on, it does the tiniest bit but it will not go all the way on and stay tight on. Can I use this crank (the one with the free wheel?) Thanks Edited February 25, 2012 by Callumm Quote Link to comment Share on other sites More sharing options...
CalRobbo341 Posted February 25, 2012 Author Report Share Posted February 25, 2012 (edited) Oh also another question, will a left pedal go on a right hand crank cos if not my above theory will not work? I don't want to try it in case I strip the thread on that one Edited February 25, 2012 by Callumm Quote Link to comment Share on other sites More sharing options...
Revolver Posted February 25, 2012 Report Share Posted February 25, 2012 The pedal and crank must match. Quote Link to comment Share on other sites More sharing options...
CalRobbo341 Posted February 25, 2012 Author Report Share Posted February 25, 2012 Just fit the right hand crank, and fit an old right hand (odd) pedal, oh well, just have to wait for someone to get back to me about a crank arm, thanks for the help guys!! Quote Link to comment Share on other sites More sharing options...
Revolver Posted February 25, 2012 Report Share Posted February 25, 2012 There;s nothing stopping you from using two left cranks or two right cranks. Except the pedal might undo. Quote Link to comment Share on other sites More sharing options...
CalRobbo341 Posted February 25, 2012 Author Report Share Posted February 25, 2012 There;s nothing stopping you from using two left cranks or two right cranks. Except the pedal might undo. I know I am just gonna check it every so often, and for me being OCD there is... Must have the same pedals!! :L Quote Link to comment Share on other sites More sharing options...
Chris Borneo Posted February 26, 2012 Report Share Posted February 26, 2012 They don't need doing up particularly tight unless you pedal backwards a lot. Running your pedals loose will knackered the thread. They do need to be done up tight! Quote Link to comment Share on other sites More sharing options...
Revolver Posted February 26, 2012 Report Share Posted February 26, 2012 Yeah, not as tight as he must be doing them up, though. Quote Link to comment Share on other sites More sharing options...
Mark W Posted February 26, 2012 Report Share Posted February 26, 2012 Yeah, not as tight as he must be doing them up, though. They strip from being too loose rather than too tight. On the face of the crank arm you can see that around the hole where the pedal axle goes there's a sort of gouge around half of it - that's where the bike's been pedalled (quite a lot by the looks of things?) with the pedal loose, and as it wobbles a bit the shoulder at the end of the threaded section of the pedal axle just mashes into the crank arm. While that's going on, the threads are getting stripped too. If you can't find a suitable replacement, we offer a pedal thread helicoiling service. Think it's around £10-12 for it, so usually cheaper than buying a brand new single crank arm. Quote Link to comment Share on other sites More sharing options...
trev Posted February 26, 2012 Report Share Posted February 26, 2012 what are the pedal threads like? is the pedal axle bent? have you smashed the pedal hard when riding? make sure there is a washer between the pedal and crank arm. had the same crank thread problem on a mouintain bike. was a result of smashing the pedal into a rock at speed. Quote Link to comment Share on other sites More sharing options...
CalRobbo341 Posted February 26, 2012 Author Report Share Posted February 26, 2012 If you can't find a suitable replacement, we offer a pedal thread helicoiling service. Think it's around £10-12 for it, so usually cheaper than buying a brand new single crank arm. Was looking on the site yet I couldn't see it, must have just skipped past it.. Shall do that as it is the cheaper option Could you perhaps tell me what to do though :L, purchase the option, I pay for postage, you do the job, then I pay for postage again? Thanks Quote Link to comment Share on other sites More sharing options...
Mark W Posted February 26, 2012 Report Share Posted February 26, 2012 You can either do that or just post the crank arm and pedal back to us with a contact number 'n' stuff, then we'll give you a call once we've got it to sort out everything else. Quote Link to comment Share on other sites More sharing options...
CalRobbo341 Posted February 26, 2012 Author Report Share Posted February 26, 2012 You can either do that or just post the crank arm and pedal back to us with a contact number 'n' stuff, then we'll give you a call once we've got it to sort out everything else. So helpful! Will do that on Tuesday then Thanks Quote Link to comment Share on other sites More sharing options...
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