With the same 20mm of ride extending compliance as the original the new eeSilk seatpost adds several design improvements for increased lateral stability and is available in carbon or alloy designs. Seatpost comes with medium elastomer installed with softer and firmer replacement options available from Cane Creek. Forged and machined aluminum arms with 20mm of travel for comfort and small bump compliance. Available in 27.2 or 31.6mm options with shims available from Cane Creek. Compatible with elastomers from previous model years. Maximum recommended rider weight 250lbs. Max extension 275mm