PNW Components Coast Suspension Dropper Post

Specifications

• Versions: 30.9mm, 120mm drop, internal routing; 27.2mm, 100mm drop, external routing
• Suspension Travel: 40mm tunable air
• Cartridge: Hydraulic Dual-Chamber Air with adjustable pressure
• Stanchion Diameter: 26mm (30.9mm), 22mm steel (27.2mm)
• Seatpost Material: 7075 alloy
• 30.9mm Internal: 400mm total length, 100mm minimum insertion, 225mm full insertion, 175mm seat collar to center of rails, 596g
• 27.2mm External: 380mm total length, 122mm minimum insertion, 200mm full insertion, 180mm seat collar to center of rails, 622g
• Lever Compatibility: All PNW levers and most cable actuated levers from other brands
• Cable and Housing: Not included with the post; included only with the purchase of a lever kit
• Warranty: PNW Lifetime Warranty
• MPN: CSDP309120IS (30.9mm Internal), CSDP272100ES (27.2mm External)

FAQ

How much air pressure should I run in the Coast?

PNW recommends 200 to 230 psi for riders 110 to 165 lbs, 230 to 260 psi for riders 165 to 240 lbs, and 260 to 300 psi for riders 240 to 275 lbs.

Which version fits my bike?

Match the diameter to your seat tube and the routing to your frame. The 30.9mm version routes the cable inside the frame and needs 100mm of minimum insertion. The 27.2mm version runs the cable along the outside of the frame for bikes without an internal dropper port and needs 122mm of minimum insertion.

Does the Coast come with a lever?

No. The post works with all PNW levers, including the Drop Bar Lever Kit for drop bar bikes, and most cable actuated levers from other brands. Cable and housing come only with a lever kit.

How often does it need service?

PNW does not set a strict service interval. Service the post when it starts to feel sticky or slow down. PNW describes service as a quick at-home process.

Best For

Gravel riders, commuters, and trekkers who want saddle drop and a bit of seatpost suspension from one part, on a 30.9mm internally routed frame or a 27.2mm frame without internal dropper routing.