Ritchey Comp 2-Bolt Seatpost: 31.6mm 400mm Black 2020 Model MFPN=670-04710AL030 27mm internal rim width supports

27mm internal rim width supports 42c -2

The opposite is true too

Reduce noise

Clean and integrated solution to mounting a Garmin or WAHOO GPS cycling computer without having to clamp it to the handlebars

Ritchey Comp 2-Bolt Seatpost: 31.6mm 400mm Black 2020 Model MFPN=670-04710AL030 27mm internal rim width supportsRitchey Comp 2 Bolt post is compatible with multiple rail types and features and extra secure 2 bolt clamp. Internally ovalized to maximize strength Two bolt design for easy to adjust vise like grip Low profile clamp reduces stress on lightweight rails and wont bottom out Bolts oriented to the axis of the rails for greatest contact area with the saddle Defined Color Black Diameter 31. 6Mm