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That's pretty much what we've been saying, except:
- Oldest Hollowgram was Hollowgram Si, not SL. There was no 'Hollowgram SL'.
- The Si chainset is available aftermarket, but he might mean the 165mm Si chainset is an exception and cannot be bought aftermarket.
- there are two versions of the new Si chainset - the Hollowforged (then machined) version and the forged version. The later looks completely different to all other Si cranks, and is basically a plain old forged pair of crankarms that happens to fit the Si axle.
- Oldest Hollowgram was Hollowgram Si, not SL. There was no 'Hollowgram SL'.
Howard-
Oldest Hollowgram was Hollowgram Si, not SL. There was no 'Hollowgram SL'.
?
Si is available aftermarket in 165mm because I've just ordered it but maybe they meant in the US?
I was less interested in crank versions and more interested in q-factor and chainline and if there were compatibility issues with axles and cranks. When they say you can't use 104mm with SiSL2 they don't mean that, they just mean it might be too narrow for your frame I think.
hippy
FYI from Cannondale Experts:
To clarify: Listed in order of generation.
Hollowgram SL- (Oldest) Used 104mm spindle bottom bracket. Never produced in 165mm or at least never sold aftermarket.
Hollowgram SiSL- (Reduced weight of SL but same 104mm BB and shape) Never sold aftermarket in 165mm.
Hollowgram Si (Newest)- Forged rather than CNC machined construction. Uses 109mm spindle. Crank arms are have different shape to maintain q-factor while chainline moves outboard by 2.5mm. This was made in 165mm. Cannot be purchased aftermarket. Only available on complete bicycles.
Hollowgram SiSL2 (Newest)- CNC machine construction. Uses 109mm spindle. Crank arms are have different shape to maintain q-factor while chainline moves outboard by 2.5mm. This was made in 165mm length and we have this in stock for purchase.
If you use a 109mm spindle on an SL or SiSL crank the q-factor increases by 5mm. If you use the 104mm spindle on Si or SiSL2 cranks you reduce the q-factor by 5mm and chainline by 2.5mm. This may not fit on your frame without contacting the chainstays. You would have to verify you have the clearance.