Is there any way to identify which Alta upgrade pully I may have? I recently bought my MCS to find out it has been upgraded.

I want to know which pully I have. Im not going to bother changing it but it would be good to know for belt replacement purposes, etc.

Cheers,
Matt

what i do know:
my pully is black, it has a bunch of holes in it (lightweight?) and it is a "version 2.0"

it should have somewhere printed on the face weather it is a 15% or 17% reduction. welcome and congrats on the new mini

It is under the sticker that says Version 2.0.......... and it is on there with 3m tape and in an awkward spot. To me, I would leave it alone. I would tell you though, I think the majority of the 2.0's were 15%

I agree it is more than likely a 15%, I didnt even know the 2.0 was made in any other size but 15%.

Could be either... I have a V2 17% on mine.