Calfees built after March of 2009 (or there abouts) use a somewhat larger version of the eccentric mated with an aluminum sleeve that is bonded into the carbon eccentric shell; again, click on the photo strip below. As noted in Update #11 of our Calfee Journal, "[Calfee] implemented a design change to their frames to accommodate a larger diameter eccentric, larger bolts, and an aluminum sleeve bonded to the inside of the .25" larger eccentric shell opening. This change accomplished three things:
- It provided a more solid interface between the eccentric halves and the eccentric shell to eliminate some customer issues with eccentric slippage;
- It moved the fixing bolts further away from the bottom bracket so that they would not be obstructed by the external bearing cups used for cranks like the FSA MegaExo and Truvative GigaPipe models; and,
- It allowed for the use of a Bushnell eccentric -- a preferred spec. for daVinci Design's tandems, remembering Calfee now produces carbon frames for daVinci as well."