Fast race build for James in Surrey: Chris King R45 ceramic bearing hubs on 50mm x 25mm carbon clincher rims laced 28-spoke rear and 3X/ 24-spoke front and 2X with Sapim CX-Ray spokes. Total weight 1657g. At £1158 (or cheaper with mates rates) a set, these are serious Shimano C50 killers. With a 20/24 spoke configuration, they would weigh in at 1600g dead. Tubular version 1440g.