Cane Creek Thudbuster ST Suspension Seatpost - 30.9 x 375mm 50mm Black MFPN=00.6118.637.002 The gasket and valve core

The gasket and valve core are replaceable for extended product usability

That is why these products carry the "Bio" label

Knowing that certain situations call for a range beyond that provided 10-42t or 11-42t cassettes

UniValve Plus fits Schrader/Presta and includes a convenient bleeder button

Cane Creek Thudbuster ST Suspension Seatpost - 30.9 x 375mm 50mm Black MFPN=00.6118.637.002 The gasket and valve coreCane Creek Thudbuster ST Suspension Seatpost 30. 9 x 375mm 50mm Black. Building on Thudbusters proven parallel linkage technology Cane Creek has completely re designed the seatpost for increased durability a higher rider weight limit additional suspension travel as well as ease of use through tool free elastomer change and a single bolt seat clamp design. Designed specifically with the rigors of e bikes and daily commuting in mind the Thudbuster ST