Bicycle Mechanics - What wrench do I need and where do I get it?
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I have an FSA carbon crank on my bike and occasionally it makes a clicking noise once per revolution when I pedal. I have read quite a bit about this problem with this specific crank and so far have been able to retorque the allen bolt that holds the crank arm on. I know the bolt is aluminum and have read that some people have wrapped it with teflon tape and the problem went away. Where I need help is with the round "keeper" ring or spanner nut (not sure what it is called) that holds the allen bolt in. I can loosen the allen bolt but the nut on the outside of it needs to come out to let the allen bolt come out. This nut has a flat face and has holes evenly spaced for a special wrench to remove it. It has M27 #1 printed on it. My question is, what is the name of the tool I need to remove it and where can I get one?
08-24-08, 10:42 AM
Park Tool (http://www.parktool.com) typically has any tool you'll need to work on a bike. You'll probably need a pin spanner (http://www.parktool.com/images/products/productimages/det_SPA-2_2005729_69640.jpg) like this:
Thank you. I made one of these but the nut is in so tight that it just strips out the hole the pin goes in. I had one person holding it in and me trying to turn it. I think I will call FSA tomorrow and ask them for auggestions. I will also get a new steel bolt from them while I am at it. I think the problem is someone tightened it way too tight at some time.
08-24-08, 12:23 PM
That pin spanner is for a bottom bracket, no? Isn't the OP looking for a tool for the back of the crankarm bolts, or am I missing something?
08-24-08, 12:23 PM
Follow the link to the Park Tool site and they say it's used for this:
Hmm... it should be tight because the nut pushes on it in order to extract the crank. In order to not strip the hole, you need a smooth pin that fits into the hole precisely. Threading some bolts through a plate won't work. The Park tool comes 2.3 and 2.7mm sizes, pick the one that fits your application. A better tool would b an adaptor that fits standard 3/8" ratchet wrenches, then you can develop the necessary torque without having to apply so much force, which typically causes tools to wobble and strip.
And going for a steel replacement bolt is the way to go. Saving 2gm in a bolt that easily corrodes and strips is such a maintenance nightmare. :(
There are two approaches: 1) Remove the bolt; 2) Remove the crank and the bolt with it. Both are viable and option 2 requires no special tools (assuming that it's self-extracting like the one shown in Danno's picture). If your purpose is to wrap the bolt threads in teflon tape, enough of the threads will be exposed once you get the crank off.
But frankly, I doubt that tape will help. More likely you're not supplying enough torque.
How are you torquing it? Do you have a torque wrench?
08-25-08, 10:14 AM
What crank are you working on? We might be able to provide more help if we know what you're working on.
FWIW...I just had an FSA SLK warranty repair due to crankarm noise. They replaced the left crankarm at no charge. As you noted, this is a known issue so you might want to take it into the shop and request they send it to FSA for warranty consideration.
09-25-08, 05:10 PM
What you need is FSA tool no. EE023, the MegaExo Pin Tool, available here (http://webstore.fullspeedahead.com/fly.aspx?layout=estoreproduct&taxid=269&pid=377) for a mere $39.99 at the FSA web store.
I have not been able to find anyone else (Park, Pedro's, etc.) that makes something like this.
09-25-08, 09:16 PM
shimano chainring bolt/crank extractor spanner works
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