152 left crank, like finding jaws 3 on betamax - I need help
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jonesthefugitive



Joined: 11 Feb 2009
Posts: 2

PostPosted: Wed Feb 11, 2009 12:20 am    Post subject: 152 left crank, like finding jaws 3 on betamax - I need help Reply with quote

Hi Everyone - just joined the forum.

I'm in need of help. I need a 152 left arm crank for my Mountain Bike. You would have thought that this wouldn't be a problem.

The problem arises with the square taper.

On my old battered crank, if you hold the crank vertical the taper is as if looking at a square. All cranks I have been able to find have the taper looking diamond shape. ( ihope you know what I mean as I am not up on tech jargon)

Not one bike shop around could help me - Can anyone on this forum?
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tomlevell



Joined: 13 Apr 2008
Posts: 989

PostPosted: Wed Feb 11, 2009 12:08 pm    Post subject: Reply with quote

What does the 152 stand for?
Length of crank?

Easiest solution is to buy a pair of cranks. If you've broken one of them the other might not be long for this world anyway.
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jonesthefugitive



Joined: 11 Feb 2009
Posts: 2

PostPosted: Wed Feb 11, 2009 12:15 pm    Post subject: Reply with quote

Yes - 152 is the length.

To buy the right hand crank involves buying and fitting the whole of the gears - above my head
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tomlevell



Joined: 13 Apr 2008
Posts: 989

PostPosted: Wed Feb 11, 2009 12:31 pm    Post subject: Reply with quote

Ah right.

This might help.

http://forum.ctc.org.uk/viewtopic.php?t=20826&start=0&postdays=0&posto rder=asc&highlight=&sid=de9add1864632467257b23d6c895f156

If you can get the crank on and off buy a new set with rings. 152mm appears to be child bike length reading that and are very cheap but heavy.
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MartinK



Joined: 05 Jan 2009
Posts: 64
Location: Edinburgh & Aviemore

PostPosted: Wed Feb 11, 2009 11:27 pm    Post subject: Reply with quote

I once found the same issue - with the square taper being 45 degrees out between cranks. I though this was a truvative vs shimano thing. Certainly the cranks I took off (shimano) were 45 degrees different to the ones I replaced them with (truvative)...
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