Mish said:
I have ridden some friends bikes and maybe the difference is in stiffness and not weight. I figured weight...and thought it a good excuse to replace some used parts with lighter stuff.
I don't know much about the Velomax Orions. Fork is full carbon (Reynolds) and the crank is Ultegra compact. I have about 13,000 miles on the group.
Yes, it could be the frame (which you don't want to part with) ... AFAIK, Titanium is generally considered to be the most compliant (softest) of the materials used for bicycle frames ...
So, FWIW, I think a Titanium frame would be a great choice for a smaller, or lighter, rider ... and, there is probably a sweet spot with regard to size which will vary depending on the actual design (e.g., a Litespeed Ghisallo should probably be reserved for ultra light, sub-125 lb. riders) & fabrication of the frame beyond which the frame be too "soft" ...
The correct crank arm length for a given rider is arbitrary & I think the formulas are suspect -- instead, compare the crank arm length on your bike with the ones on the other bikes you rode. You may want a longer, or shorter, crank depending on the type of terrain you ride ... YES, I think the same rider can efficiently use different length cranks.
BTW. You may want to have your wheels serviced -- new bearings (I don't remember if they are cartridge or "loose" -- the only thing I remember about the Velomax wheels is that their freehub body could be swapped with one from a Shimano hub). THAT could be some of the difference ...
Also, are your Velomax Orion wheels 28 spoke or 24 spoke? I vaguely recall that the Velomax Ascent (?) could be spec'd with either spoke count ... some people would probably say the spoke count doesn't matter, but I think it does.
If your bike has one of the older (non-cartridge) DA bottom brackets, then have it serviced, too. YOU can do it, yourself ... white lithium grease ... the bearings are barely held in place by their respective cages (i.e. the grease holds the bearings in place), so some caution is required.