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Crank arm switcharoo

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Old 04-03-08, 08:05 PM
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Crank arm switcharoo

how hard it is to replace a crank arm?
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Old 04-03-08, 08:07 PM
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Takes about 45 seconds with the proper tools. Question is, why are you replacing it?
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Old 04-03-08, 08:16 PM
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it's complicated. i want the gears off of one deore xt crankset (48/36/26) but has 175 arms, which are probably too long because I'm 5'2", and I want the arms off of the standard 44/32/22 at 165- 170.
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Old 04-03-08, 08:22 PM
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Not a Deore expert by any means, but isn't the drive side arm pretty much permanently attached to the spider? I think you want to swap out the chainrings, not the arms, although you still have to remove the none-drive arm to do that.

Check with your LBS, ask them what the cost to pull the arm off vs. cost of a crank puller, but really you might want one later anyway and they aren't terribly expensive. Don't try to do it without the right tools though, you'll bugger something up but good.
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Old 04-03-08, 08:25 PM
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err that is what I meant, crank + spider switcharoo.

what would I do with a crank puller when I am done?
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Old 04-03-08, 08:37 PM
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Just buy a crank-puller. If you do even a nominal amount of work on your bike, you'll need one.
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Old 04-03-08, 08:39 PM
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Originally Posted by madscot13
err that is what I meant, crank + spider switcharoo.

what would I do with a crank puller when I am done?
Crank puller = cheap. Keep it for when you decide to rebuild or replace your BB. Tools are always a good investment, along with the knowledge to use them. Try this place for knowledge:

https://www.parktool.com/repair/byreg...mageField2.y=6
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Old 04-03-08, 08:43 PM
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Originally Posted by krusty
Crank puller = cheap. Keep it for when you decide to rebuild or replace your BB. Tools are always a good investment, along with the knowledge to use them. Try this place for knowledge:

https://www.parktool.com/repair/byreg...mageField2.y=6
Agreed. I bought one several years ago when the kids were young and BMX racing. I've used it several times in recent couple of years. I like to do a complete tear down once a year or so, but you'll need it again some time. A little greaasse on the spindle when you put the new one on, please.
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Old 04-03-08, 08:59 PM
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you do realize that by buying this tool, my bike is in imminent danger. what if I over tighten?
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Old 04-03-08, 09:07 PM
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Originally Posted by madscot13
you do realize that by buying this tool, my bike is in imminent danger. what if I over tighten?
Get a torque wrench too. Every man needs a torque wrench.
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Old 04-03-08, 09:18 PM
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how about every girl?

will the torque wrench prevent me from over tightening? I imagine it would

also, can someone tell me how it is done? I'm still a bit mystified. Beyond knowing that it is easy and requires a tool or two, I'm stuck.
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Old 04-04-08, 03:40 AM
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Look at the Park Tools link posted above. Depends on the type of bottom bracket/crank interface you have...
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