i'd rather not ask this, but RD2 cranks: where can i find them?!
i've been looking all over the internet and can't find the sugino rd2 cranks black 170mm (i'm assuming you measure from center of the hole to center of the hole? sorry i dont know the technical terms). i've been to 2 local bike shops, and atleast 20-30 sites on the internet, and nothing. i'm just looking for the cranks, not the chainring, because i want to keep rocking 48t (or 49) and not the 44 that the messenger chainring offers.
There's an RD Messenger and an RD2 Messenger (little to no availability right now). Soma Fabrications has them and so does Merry sales (related distributor). No idea about black availability. When I emailed Sugino about them they said the new version was stiffer and I think they also cleared up the "165 hole drilled into 170-something arms" ugliness.
I believe that when they say RD2, they are referring to the RD but using the Zen Messenger chainring.
Normally, the chainring that the RD uses is a 3/32 chainring, 130 BCD.
The Zen Messenger chainring is also 130 BCD but it's a 1/8.
I'm not 100% sure of this. Anybody else know?
never mind whether or not they are on rd2's, i believe that "zen" is a label which is only attached to the 144 rings - i believe that the ring you are referring to is just a "messenger" ring, since it is 130 bcd.