We have a couple different versions of seat masts we can offer. They all fit with our frames and all have different pros and cons. 

The Ritchey WCS seatmast has a 25mm setback. for different types of saddle rail, you need different clamp parts. it comes with parts for standard 7mm round saddle rails. if you have carbon fibers rails (either in 7x10mm or 8x8.5mm), let us know and we will include it for you!

Saddle Setback; 25mm

Height adjustment range ; 40mm

The KCNC Majestic is machined from 7075 aluminium. works with all sorts of saddle rails and is easy to adjust. 

Setback is 0 or 25mm. 

Heigth adjustment range is  20mm on the 50mm version (20-40mm from rails), or 60mm on the 100mm version (30-90mm from rails).