I NEED HELP!! (crankset, crank arm confusion)

I am have a hell of a time trying to figure this out. I was stupid and stripped out my left crank arm and I have been looking for a replacement arm. This is for my winter bike and the arm that I stripped out is an RPM 165mm crank arm. Now the only replacement arm I can find says that the spindle length is 110, 113, 113mm. Well my bottom bracket says its a 103L.... I havent really messed with this stuff but will that arm work with a 103mm bottom bracket??

I hope that made sense...


here is the link to the part


http://www.ebikestop.com/rpm_left_165mm_arm_black-CR2125.php

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Permalink Reply by Gecko on April 4, 2009 at 7:30pm
From the quick google I did, it seems like the arm you found should work fine. If it's a single speed/fixie, you should keep the 103 bb because it positions the drive side for the correct chainline. If I'm hypothesizing correctly, 103mm is for single speed/fixie, 110mm is for road, and 113mm is for mtb because of the spacing needed for the extra chainrings. What brand/model of cranks are on it right now?
Permalink Reply by Justin on April 4, 2009 at 7:36pm
well... I bought the bike off of bikesdirect.com its a windsor "the hour" I just needed a cheap winter bike. The left arm is RPM and the right one and chain ring is FSA. It came stock brand new like that so I am assuming that RPM is part of FSA.. I am not positive. I have no clue what the model is.. I looked on the website for the details but they dont have anything on it. So yeah.. hah
Permalink Reply by Bruce Underwood on April 5, 2009 at 3:26am
It should work just fine. The only problem you may have is clearing the chainstay depending on the curve of the crankarm. The alternative is to replace the whole crankset but since this is just a winter bike you should be good to go.

Bruce
Certified Tech.
REI, Northbrook

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