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@a|s
Just looking for a bit of advice regards cranks, a little bit confused about some things.
I'm riding a Dolan ally track frame, first proper track frame after a series of conversions. Currently improving the parts i have on it and looking at cranks and replacing the rear hub.
The rear hub is gonna be a gran compe, so have 120mm spacing, the bb is currently some shimano thing, possibly a UN33 and the cranks are shitty mtb cranks with a 45t chain ring.
I'm a little confused by dura ace cranks, i know the 7600 is 144bcd square taper and the 7710 is 144bcd and octalink splined. these are pretty expensive and the cheapest i've found them is the 7600s for ~150 with chain ring {parker}.
my main question is how different are these from the equivalent dura ace double road cranks, 7400 and 7700 ? I was told the main difference is the bcd {road are 130} and the small lip behind the spider to accommodate the second chain ring. How correct is this estimation?
If i was to get a road version, as they're much cheaper than the track one [second hand], how easy is it to get a good 42mm chainline? would it be a case of getting a bb with the same spindle length as i would for the track one or will the road one move more or less further along the bb spindle and so require me to get a bb of a different length?
alternatively i've been looking at the miche primato advanced chainset or the dia compe gran compe track chainset, anyone any experience with these, in particular the dia compe one?
thanks for any help in advance