I have a RD205 AC rear hub and Kinlin XR270 28 hole which I am going to get built here in the UK using CX-Ray spokes.

Trouble is I believe 2x is best build for these hubs (correct me if I am wrong) and am having diffuclty sorting out spoke length.

Sapim site seems to offer a longer spoke as it asks for thickness of teh rim where spoke passes through. Other spoke calculators do not ask this.

Does anyone know which is best spoke calculator to use or spoke length?

Thanks,

Matty