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I bought an M770 crankset used from someone off an online market place, and this fixing bolt wasn't included in the sale. Every time I'd ride, the non-drive-side arm would come loose every 10-or-so miles and one of my buddies in our riding group said, "You know, if you don't buy the fixing bolt and put it on there, this isn't ever going to stop". I picked this guy up and put it on the bike, and no more loose crank arm! It's almost like Shimano designed it for a purpose!
Verified purchase: Yes | Condition: New
Just like the one that comes with the crank set. The picture shows the Shimano logo on it but the one you receive is plain black. For me that is a plus cause I didn't want the logo anyways but you should probably know that. Some are more picky than others.
Verified purchase: Yes | Condition: New
does what is intended to do
Verified purchase: Yes | Condition: New
Solid replacement will fit other models
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Its the factory nut from the crankset
Verified purchase: Yes | Condition: New