Penske says its new PS-89F nitrogen-filled fork cartridges offer better bump control and improved grip. The design separates the air/nitrogen from the fork oil—as is found in rear shock absorbers—providing more consistent damping. Rebound and compression damping are adjustable in each fork leg. Suggested retail for the fork cartridge kit is $2995 and includes a set of springs matched to the rider’s weight. For more information, contact Penske Racing Shocks, Dept. RW, 150 Franklin St., Reading, PA 19602, (610) 375-6180, www.penskeshocks.com.