Headley Posted March 15, 2009 Report Share Posted March 15, 2009 (edited) Hi, recently I have had 2 pedal threads strip from 2 different pairs of cranks; the first was echo forged and the second echo CNC. Both times the threads have stripped from just pedaling along normally. What could this be down to? the pedal threads themsleves? I'm not too shure myself. Edited March 15, 2009 by Headley Quote Link to comment Share on other sites More sharing options...
bigamac Posted March 15, 2009 Report Share Posted March 15, 2009 What pedals are you using? Quote Link to comment Share on other sites More sharing options...
Headley Posted March 15, 2009 Author Report Share Posted March 15, 2009 DMR V8's Quote Link to comment Share on other sites More sharing options...
Alex Dark Posted March 15, 2009 Report Share Posted March 15, 2009 threads m,ight be buggered on the pedals...are you tightening them up properly?are they coming loose before they strip?? are they hard to put in? Quote Link to comment Share on other sites More sharing options...
matt_urban Posted March 15, 2009 Report Share Posted March 15, 2009 its almost always that there run loose greese them and get a pedal spanner not just a 15mm spanner Quote Link to comment Share on other sites More sharing options...
Headley Posted March 15, 2009 Author Report Share Posted March 15, 2009 (edited) In answer to a couple of questions, the pedals don't come loose before they strip and I tightened them up nice a tight on both sets of cranks along with some locktight on the second pair of cranks.Edit: I havn't been using a pedal spanner just a 6mm alan key and long bar on the end. Edited March 15, 2009 by Headley Quote Link to comment Share on other sites More sharing options...
basher Posted March 15, 2009 Report Share Posted March 15, 2009 it can only be one of four things really. my guess its one of the last 2 you got really unlucky and got 2 pairs of duff cranks that had manufacturing defaultsthe pedal threads are dodgyyou cross threaded them when screwing the pedals in.the pedals worked loose and youve not relised. most likely one.i think it will be most likely to be the last one, pedals can have a bad habbit of working loose and if you dont check them especially when new then you run the risk of them coming loose when riding sometime and not reliseing. Quote Link to comment Share on other sites More sharing options...
Muel Posted March 15, 2009 Report Share Posted March 15, 2009 its almost always that there run loose greese them and get a pedal spanner not just a 15mm spannerPedal spanners are shite though? They bend and flex all over the show.Sounds like you might have over tightened them if you had to use a bar aswell. Quote Link to comment Share on other sites More sharing options...
Connor Powell Posted March 15, 2009 Report Share Posted March 15, 2009 Stupid as it may seem, have you put the pedals of the wrong sides? Quote Link to comment Share on other sites More sharing options...
JonMack Posted March 15, 2009 Report Share Posted March 15, 2009 I find my LH V12 comes loose all the time, so it could well be that they've just been coming loose without you realising. Quote Link to comment Share on other sites More sharing options...
Alex Dark Posted March 15, 2009 Report Share Posted March 15, 2009 Stupid as it may seem, have you put the pedals of the wrong sides?they'd be nigh on impossible to force in... Quote Link to comment Share on other sites More sharing options...
matt_urban Posted March 15, 2009 Report Share Posted March 15, 2009 if there tight in the cranks then its the cranks trials and pikeys are the only time people come in our shop with striped cranks Quote Link to comment Share on other sites More sharing options...
Bionic Balls Posted March 16, 2009 Report Share Posted March 16, 2009 in my experience you just can't get them tight enough with a 6mm allen key...tis fine for the bulk of the tightening, but you really should get a spanner on chances are they were loose then.. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted March 16, 2009 Report Share Posted March 16, 2009 I would second the thoughts that the pedals were run loose - this is the only way I have ever seen a pedal thread strip out.Step 1: Use plenty of good quality greaseStep 2: Use a pedal washerStep 3: Make sure you keep checking the pedals are tight, especially when your cranks are new Quote Link to comment Share on other sites More sharing options...
Headley Posted March 16, 2009 Author Report Share Posted March 16, 2009 (edited) Thanks for the replies everyone; from what people have put and down to only using an alan key to tighten the pedals it's most likely down to not fully tightening. I'll be going down to the lbs to get myself a pedal spanner tomorrow. Cheers again. Edited March 16, 2009 by Headley Quote Link to comment Share on other sites More sharing options...
N.Wood Posted March 16, 2009 Report Share Posted March 16, 2009 I just used an allen key to tighten my pedals back in the day and even doing them as tight as i could with a Park allen key, they still came loose. I then invested in a pedal spanner and they've not come loose since. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted March 16, 2009 Report Share Posted March 16, 2009 Yeah, as Nick said, it's worth the proper tools so you can get the proper torque.The recommended setting is 35Nm... which works out to 3.5 bags of sugar hanging off a bar which is 1 metre long (kinda hard to imagine how much torque this is though...). If you are only using a 5cm long allen key from a multi-tool then you need 70kg of weight hanging off it (ie. probably all your body weight) to create enough torque... which would snap the tool. Quote Link to comment Share on other sites More sharing options...
Ben John-Hynes Posted March 16, 2009 Report Share Posted March 16, 2009 Yeah, as Nick said, it's worth the proper tools so you can get the proper torque.The recommended setting is 35Nm... which works out to 3.5 bags of sugar hanging off a bar which is 1 metre long (kinda hard to imagine how much torque this is though...). If you are only using a 5cm long allen key from a multi-tool then you need 70kg of weight hanging off it (ie. probably all your body weight) to create enough torque... which would snap the tool.Never reallt thought about it like that. It really makes sense now! Quote Link to comment Share on other sites More sharing options...
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