I am building my Moots Vamoots RSL as light as possible for the Everest Challenge, while remaining durable and without any performance glitches (e.g. shifting issues). A power meter and Shimano Di2 shifting are mandatory.
This drives certain choices—
- Cannondale Hollowgram SL crankset with FSA N10 chainrings (IF the shifting works well with Shimano DuraAce Di2 shifting, then it gets the SRM power meter spider). This should save as much as 230 grams = 0.51 pounds, based on SRM specs.
- Ritchey SuperLogic II handlebar (but Bontrager Race XXX Lite to start).
- Ritchey Logic WCS 260 stem.
- Ritchey Logic SuperLogic carbon seat post.
The Cannondale Hollowgram crankset looks to save 1/2 pound or so versus a DuraAce crankset (that's a figure based on SRM specs, could be less), a figure to be confirmed when configured with an SRM spider.
The Hollowgram crankset has a key advantage on the Moots Vamoots RSL: no adapter is needed for the PressFit 30 bottom bracket, whereas a DuraAce crankset is not only heavier, but also requires an adapter.
The Ritchey parts save 10-20 grams each over other alternatives I’d consider, which can add up to a few ounces.
Along with bits and pieces such as aluminum bolts for the watter bottles and a few other titanium oddments saving 4-10 grams each, single layer bar tape (it all adds up), I am optimistic that the Vamoots RSL can approach the 14.5 pound mark, which would be remarkable for a titanium road bike.