Hi everybody,
I used to make all repairs on my bike. This sometimes has bad consecuences... I had a creak noise on my crankset ( new Sram Red Gpx ). I tried to disassemble with first a 10mm allen key, Big mistake. This is the selfextractor mechanism. After this I used a8mm key for the internal bolt, and i could take off the crank arm and tightened the crankset. Now the problem is that the external 10mm part is broken ( its made from aluminium). Anybody nowks if exits a replacement or i need to buy a new left crank? In Sram site doesnt seems to exit. In this moment is an aesthetic problem...but all you now what is aesthetic for i biker...

Sorry my bad English.

Oscar. Valencia (Spain)

Pretty sure the 10 mm part screws out and I have been able to get almost every part I have ever needed from SRAM (you have to ask the right bike shop-most will say no way.) I have bought a replacement bolt for an XX rear deraileur which is a part that has to be pressed in so you know Shitmano would never make that available. I have gotten a cover plate for a bottom bracket and other small parts that you know would not be available from others.

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For certain parts stiffer is more important than lighter.

Save weight and leave the outer collar off until you need to remove the crank!

Thanks for your replies , Maybe take off the collar is best option if it isnt necessary for normal use;

i will ask my mechanic for a replacement for this collar,

I ordered the exact same part, from my LBS. They said any SRAM dealer could get small parts like that. They had a catalog, that broke down all the parts of the crankset, by number.