Dual-Position Seatpost

Everything you need to know about our Dual-Position Seatpost

How far does the seatpost move between road and aero positions?
The Dual-Position Seatpost moves 50mm between the road and aero positions.  The linkage is designed as such that the bottom bracket to saddle distance rema...
Sat, 30 Dec, 2017 at 12:38 PM
What kind of testing do you do to qualify the Dual-Position Seatpost?
All Redshift Sports components are tested to the latest ISO 4210 standard for Racing Bicycles.  These standards typically specify "Static Strength&...
Fri, 25 Jan, 2019 at 10:06 AM
Will the Dual-Position Seatpost fit a Shimano Di2 battery inside?
Yes, the standard "lipstick" style Shimano Di2 battery will fit inside the seatpost.  Keep in mind that the inner diameter of the seatpost is ova...
Sat, 30 Dec, 2017 at 12:39 PM
What is the weight limit for the Dual-Position Seatpost?
The rider weight limit for the Dual-Position Seatpost is 115 kg (250 lb).
Fri, 25 Jan, 2019 at 10:07 AM
How do you ensure proper bike fit in both the road and aero positions?
The linkages geometry of the Dual-Position Seatpost was specifically designed to provide an optimized aero riding position on a road bike. Starting with you...
Tue, 17 Oct, 2017 at 4:43 PM
Will my saddle bag fit with the Dual-Position Seatpost?
Most standard strap-based saddle bags will fit the dual-position seatpost without issue.  You may need to loosen the straps slightly to accommodate the ...
Fri, 16 Mar, 2018 at 9:44 AM
Why does the Dual-Position Seatpost need to move?
This is a really important question, and it's one that we've spent a lot of time thinking about here at Redshift Sports, so get ready for a long ans...
Fri, 25 Jan, 2019 at 10:07 AM
What is the effective setback of the Dual-Position Seatpost?
In the road position (rearward position), the seatpost has 16mm of rearward setback.  In the aero position (forward), the saddle clamp is offset 34mm fo...
Fri, 25 Jan, 2019 at 10:08 AM
Will riding with a forward saddle position compromise my bike's handling?
We specifically designed the Dual-Position Seatpost to provide an optimized riding position on a road bike.  If you're new to riding in an aero posi...
Mon, 8 Jan, 2018 at 4:25 PM
Can I adjust the saddle position independently in the road and aero positions?
The amount of forward travel of the seatpost is fixed at 50mm, so the two positions are not independently adjustable. For most riders, we recommend that they...
Fri, 14 Sep, 2018 at 11:58 AM