Thom Posted January 26, 2006 Report Share Posted January 26, 2006 (edited) I tried installing the non driveside crank arm today and it seems that the crank isn't going all the way onto the spindle. No matter how hard I hit the crank theres still about a 1 cm gap. The cranks i'm using now almost go all the way in with no problems but that uses a self extracting/self pulling bolt so since the tensiles also can use these bolts I put them on. So i install the crank with the bolt but it is only slightly better there is still a gap. surely this is not normal ? I mean the splines aren't contacting with the spindle properly. Anyone know whats wrong ? I havn't tried the driveside yet because I'm still waiting for my trackcog. Edited January 26, 2006 by norco_trials Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted January 26, 2006 Report Share Posted January 26, 2006 Thats perfectly normal. There needs to be some 'preload' of around 3-5mm when the cranks are new. If this is not there, that means the crank interface is too loose, and you will run into problems in the future.Have you greased the spline? This will allow the crank to slide on further, and make removal easier.Adam Quote Link to comment Share on other sites More sharing options...
Thom Posted January 26, 2006 Author Report Share Posted January 26, 2006 Ok thats good, its just that the cranks i'm running now go pretty much all the way in, theres like a 2mm gap. So when you say 'when the cranks are new' does that mean it will move closer when it gets older ? also if i don't use the self pulling bolts the crank has a much bigger gap and no matter how hard I hit it it doesn't budge. I'm planning to not use these bolts and run normal ones so my problem is still kinda apparent. Quote Link to comment Share on other sites More sharing options...
nmt_oli Posted January 26, 2006 Report Share Posted January 26, 2006 Sqaure taper, or Splined interface? if its splined, ie ISIS, then there should be no gap, but if its square, then its not a problem as long as the crank is on the taper, tight and the bolt is at the correct torque. Quote Link to comment Share on other sites More sharing options...
Dan Clark Posted January 26, 2006 Report Share Posted January 26, 2006 Its perfectly normal, nothing to worry about. Quote Link to comment Share on other sites More sharing options...
ScotchDave Posted January 26, 2006 Report Share Posted January 26, 2006 As long as you keep an eye on it and don't ride it loose you won't do any damage. Just ride it a bit, check it every time you go out for a ride to make sure it isn't loose and your sorted. Quote Link to comment Share on other sites More sharing options...
N.Wood Posted January 26, 2006 Report Share Posted January 26, 2006 So when you say 'when the cranks are new' does that mean it will move closer when it gets older ? I would have thought so. What Adam's saying is that if it went all the way on now, in the future it'd be too loose because the metal is stretched each time you install/remove the crank. ISIS cranks have a taper on them, if it was all the way up the crank now it'd be too loose in the future. Bolt wise, i'd use whichever you like, the gap won't make any difference. There's enough crank/spindle interface to make it safe, and as has been said above, it'll get smaller. Quote Link to comment Share on other sites More sharing options...
Thom Posted January 27, 2006 Author Report Share Posted January 27, 2006 (edited) thanks alot guys, just one more thing though.When you screw the round thing with the holes onto the crank is that meant to be really tight? Edited January 27, 2006 by norco_trials Quote Link to comment Share on other sites More sharing options...
CurtisRider Posted January 27, 2006 Report Share Posted January 27, 2006 personally i would keep away from self extractors.....but in answer to your question-tight enough for them not to spin loose when your trousers/shoes rub against them (happened to me) Quote Link to comment Share on other sites More sharing options...
Thom Posted January 27, 2006 Author Report Share Posted January 27, 2006 (edited) what is wrong with self extractors ? I've been running some for a year now (they came with my cranks) and they've been alright. Do they strip easy or something ? Edited January 27, 2006 by norco_trials Quote Link to comment Share on other sites More sharing options...
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