It’s FSA brand, came stock on my giant revolt. Shop guy thought it might be self extracting (but he didn’t see it, just my description). There’s no other bolt inside. I can’t really turn the large 10mm bolt. Assume I need a pin spanner but am not sure what size. There is nothing on the other crank. Thanks!
by Designer_Tie_5853
7 Comments
Edit on closer examination seems not. Not sure why you can’t undo it with a big ass hex key?
https://preview.redd.it/todwc4s93alf1.jpeg?width=1200&format=pjpg&auto=webp&s=07b5c1e1e2fa14502eb43b735ab61036b9566406
One of these?
You turn the 10mm bolt, and that’s it. The pin spanner plate is the self-extracting plate and should not be removed.
You’re gonna need a longer wrench 🙂
Its absolutely self extracting, you probably just need a longer hex wrench for more torque. 40Nm is quite a bit. Not doable with a pocket sized allen.
Follow instructions printed on cranks……
There’s 2 parts to this, you have the crank bolt (which takes a hex key) and the self extraction cap (which needs a special tool with 6 pins on).
How it works is as you slacken off the crank bolt its head pushes against the self extraction cap and pull the crank off the axle. Without the self extraction cap the bolt would come out and the crank would be left on the axle.
Just ignore the self extraction cap and undo the crank bolt anti-clockwise (the way it’s marked on the bolt NOT THE SELF EXTRACTION CAP). They can be a bit stiff to undo so leverage can be your friend here so a wrench with a long handle or a breaker bar can come in clutch but if you use a breaker bar check and double check you are turning it the correct way first.
You can buy allen head “sockets” for 3/8″ inch drive ratcheting socket wrenches. That ought to give you enough torque.
Turn the 8mm or 10mm whatever it is counter clockwise. Lefty loosy. It will be tight and then get loose and then feel tight again. That’s normal, that’s the self-extracting function pushing the crank off the spindle. Keep turning counter clockwise until the crank comes off.