Is a special wrench required to remove campy chain rings from the crank set? They appear to be screwed on with what looks like bolts than an allen wrench should undo, but the hole appears to be between sizes and have little crimps around the edge? any thoughts, other than campy has discovered a way to make a little extra cash, make all their gear so that you need special tools that they also sell to work on.

Nothing special. Just an 8mm hex wrench.

5 MM, just checked...unless there are newer ways invented this year.

btw: if it is not metric, please put it down.....

re: 8 MM, sound like the tool for the crank bolt

You sir...errr...poop...are correct. Minor brain fart here.

i believe some of the newer chainring bolts are torx head...

I used a 5mm allen and a Shimano chainring tool. It worked fine for me. Good luck.

Tim

In the light of this, the OP should decide if his bolts look like this:



Which would be

or this:



So yeah, looks like you need to get a torx wrench or take it to a shop. Torx is not a Campy invention... a bit more widely used than that, but still a PITA.

Looks like Torx to me. Advance Auto has a 1/4, 3/8 drive Torx bit set for around $10. Got a set because my Saab for some reason has tons of Torx head fasteners.

wow, so campy has switched to using torx ? if so, wonder if it is the same size wrench as for disc brakes, only because LBS would then have some.

it is definitely not a hex, one size is too small, the next largest is too large, must be a torx.

My two month old Chorus 10-speed triple crank definitely uses a 5 mm hex. Is your crank one of the Carbon ones?

'cause it's a GM Been a mechanic all my life (other fields) hate those torx fasteners. $30,000 worth of hand tools, an some wise azz decides we need these

it's a torx almost for sure. be careful if they're aluminum, i managed to shear one this one this afternoon with surprising ease. get the proper torx bit, i'm guessing its a t30.

Is anyone sure it's a Torx fastener yet? Do we have any pics from the actual crankset? And when (if ever) did Campy start using Torx fasteners (if indeed this is what we have)?

Upon further research it appears some of Campy's carbon cranksets do use Torx fasteners .

FSA uses torx on their cranksets. they are aluminum and sheer quite often if you're not careful...truvativ have been using a 6mm on one side and 5mm on the other for some time now too, also aluminum, and extremely sheer-prone.

crank manufacturers of the world, i ask you: what the hell is wrong with good old stainless steel chainring bolts?!

Sacrilige! Why you are saving at least .834 grams of rotating weight per chainring bolt! Think of the huge advantage you will have over other cyclists in the final sprint to Starbucks. And for the real OCP, you can get another .03287 grams (approximately) of weight saving because we have, for a slightly higher price, bolts made of unobtanium!

Besides, those pesky steel fasteners had a tendency to work. We need progress, we can't leave well enough alone!