Upgrade the ride feel with a suspension seatpost, a softer saddle and a spring kit. Suspension Seatpost absorbs bumps and vibration ComfortMax Saddle for longer rides Spring Kit lets you adjust or replace the suspension spring Compatibility Summit 2 Notice Record your saddle height, fit the new saddle and seatpost past the minimum insertion mark, set the spring for your weight, then re-check everything after a short test ride.