the crankset i have is 130 bcd half step.
in the shimano bochure on sheldon brown's
website, there are two setups. one is a double
and next to the ring bolt is a raised plug.
i assume these were manufactured all the
same, and one set was drilled for 110, the other
for 130. thse are interchangeable since
the whole chainring apparatus bolts to the
arm very much like a t.a. pro vis, except
with 5 bolts instead of 6.
anyway, if this makes sense to anyone and they
can point me toward the outer ring for the
triple, i'd be most obliged. as always
yr obdt svt
Stephen Fredette
Hull, Massachusetts