Darimo Seatpost Shim Kit Weight: 17.9 g vs 28.9 g Stock Alloy

A Darimo seatpost comes with a proprietary shim and clamp stack at the top of the post — the part that sits just under the saddle. The stock alloy set weighs 28.9 g. TiNE's Darimo-specific kit, built around a carbon base, two 7075 aluminum shims, and two titanium bolts, weighs 17.9 g — saving 11.0 g directly under the saddle without changing saddle height or saddle position.

Every gram saved under the saddle is a gram your body feels on every pedal stroke. The shim stack doesn't move, but the bike carries less dead weight right where you sit.

TiNE Darimo-Specific Kit

Two titanium bolts, two 7075 aluminum shims, and a thin carbon base — all cut to match Darimo's seatpost diameter. Verified weight: 17.9 g, savings of 11.0 g versus the 28.9 g stock alloy set. The two titanium bolts are CNC-machined from Grade 5 Ti-6Al-4V, anodized in eight colors. The shims and base sit in the same position as the stock parts — saddle height, saddle angle, and fore-aft position all stay identical to the original setup.

Why Position at the Seatpost Matters

Mass saved under the saddle is mass the rider is sitting on. While it isn't rotating mass (so the angular momentum argument doesn't apply the way it does at the wheels or crank), it does reduce the bike's total weight at one of its highest static points. Lighter seatpost hardware makes the bike easier to lift onto a roof rack, easier to shoulder up a set of stairs, and contributes to a bike that feels less bulky on long climbs where every handling input is amplified by fatigue. Pro mechanics building sub-6 kg race bikes obsess over parts like this because every gram is a tradeoff: weight, function, durability, and cost. Cutting 11 g from a part the rider never sees is the kind of detail that separates a 6.8 kg build from a 6.2 kg one.

Compatibility

TiNE's Darimo kit is cut to Darimo's seatpost diameter. Riders running other brands (V5RS, Y1RS, Roval, Colnago, Cervelo S5, Pinarello, EXS, Quick Pro ER One) need the corresponding TiNE kit for that seatpost — dimensions and shim thicknesses differ by post. Mixing kits across seatpost brands will not fit and may damage the post finish.