Bicycle Mechanics - I need a new crankarm
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02-27-08, 11:54 AM
I got into an accident a while ago and I need to replace the left crank arm on my Truvativ 5D crankset. Now I've looked and it seems the only crankarms available are square tapered. Like this:
What I have definitely does not seem to be square tapered at all. What do I do here? Am I just **** out of luck?
02-27-08, 11:56 AM
You should be able to find a replacement. I see single arms out there all the time. It will just be a lot of research to find one.
02-27-08, 12:00 PM
Am I missing something here? I mean I have the crank arm here on the bike in front of me and it definitely does not seem to have a square taper. Does Truvativ produce one off sort of cranks for certain bike manufacturers (my bike is a store bough 06 Specialized Rockhopper Comp)? Seems a bit silly.
02-27-08, 12:09 PM
Looks like you can get it in either square taper or isis, and Jenson just has square taper. If it comes down to it, seems like a whole new 5d crankset is not that expensive.
02-27-08, 12:22 PM
Go to the LBS and have them peruse the QBP parts catalogue. Should be in there.
02-27-08, 01:05 PM
Thanks for the help guys. Just one more thing. How do I get this crank arm off? Like what type of crank tool do I need? Again thanks for the help.
02-27-08, 01:15 PM
Truvativ also makes a PowerSpline bb. It's the diameter of a sq. tp., but splined. It's OEM and it sucks. Some of their lower end cranksets used this in some instances (Blaze, 5D, ISOflow)
02-28-08, 07:35 AM
Standard crank removal tool should work fine.
02-28-08, 10:53 AM
You can use a standard crank removal tool if it is a square tapper. Go to your local bike shop, we always have used and new replacement left crank arms. If it's the powerspline demand a new crank because they suck. I have never seen more problems with crank arms falling off when it comes to Truvativ.
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