9.3 average score from 40 reviews


Model number: BSP-15
  • Versatile, low-profile seatpost with 15 mm offset
  • 6061 T6 aluminium
  • Dual bolt adjustable clamp
  • Extra long seatpost(400mm)
  • Certified to use on all types of bikes including E-bike (EN-15194)
More information

TopPost Seatpost

The TopPost is one of our top of the line seatposts. Super strong and lightweight 6061 T6 aluminium to get you to the top of the hill. The TopPost gets you to your top and makes every ride super comfortable.


  • Sizes 27.2mm (325g), 30.9mm (315g), 31.6mm (305g)
  • Diameter 27.2,30.9,31.6


  • Length Seatpost (mm) 400
  • Offset (mm) 15
  • Clamp mechanism Dual bolt
  • Carbon rails compatible Yes
  • Seatpost suspension No
  • Certified for E-Bike (EN 15194), MTB (EN 14766 / ISO 4210), Road (EN 14781 / ISO 4210), Touring (EN 14764 / ISO 4210)
  • Minimum insert length (mm) 120


The seatpost offset refers to the distance between the centerline of the seatpost and the centerline of the saddle rail clamp. A zero offset aligns the clamp with the seatpost, while a 15mm offset positions the center of the saddle rail clamp 15mm behind the center of the seatpost. The offset affects the saddle position and influences saddle position and rider comfort on the bike.