Darimo Carbon Seatpost for Colnago Y1RS (+7.5 / 0 / −7.5 mm Offset)
Crazy fact: The Y1RS is one of the few current aero race frames where swapping the seatpost can still remove meaningful weight from a complete build.
What it does (and why you’d change it)
This seatpost is a functional upgrade for the Y1RS: reduce mass at saddle height, keep fit control, and avoid carrying excess material.
Key points
- ⚡Reduced mass at saddle height — weight removed up high affects seated feel more than the same grams down low.
- 🔧Reversible clamp: +7.5 / 0 / −7.5 mm — three setback positions from one post.
- 🧱Designed for seated rider loads — carbon is engineered around how a seatpost is actually loaded in use.
- 🎯Y1RS-specific interface — built to suit the Colnago Y1RS fit/shape requirement, not a generic “close enough” post.
Offset explained (no confusion)
This does not change frame geometry. It changes your effective saddle position via setback.
Positions: +7.5 mm (forward) / 0 mm (neutral) / −7.5 mm (rearward).
Important notes
Do not cut this seatpost. Darimo posts are engineered for strength and weight as supplied. Cutting can compromise structural integrity.
Use correct torque. Follow the torque specification for the Y1RS seatpost clamp hardware. Under-clamping can slip; over-torquing risks damage.
FAQs
Does this really have three positions?
Yes. The reversible clamp design provides three setback options: +7.5 mm, 0 mm, and −7.5 mm.
What changes when I move between +7.5 / 0 / −7.5?
Your saddle’s fore/aft position relative to the bottom bracket. This is a fit adjustment (setback), not a change to the bike’s angles.
How do I choose which position to run?
Match your current setback first. Use +7.5 to move forward, 0 as neutral, or −7.5 to add setback without pushing your saddle to the limits of its rails.
Can I cut it to lower saddle height?
No. Darimo seatposts are not designed to be cut. Cutting can compromise structural integrity and is not recommended.
What torque should I use?
Use the torque specification printed/provided for the Y1RS seatpost clamp hardware. If you don’t have it, check Colnago’s documentation for the frame/clamp assembly or your mechanic’s service notes.
Will it work with my saddle rails?
It depends on the clamp hardware supplied with the seatpost and your rail type. Standard round rails are typically straightforward; if you’re using a non-standard rail shape/size, confirm compatibility before install.
Does this change the ride, or is it just weight?
Main change is reduced mass at saddle height. Any feel difference is secondary and depends on your setup, tyre pressure, and how sensitive you are to seated compliance.