Gear Guy
Q:
Will a suspension seatpost screw up my biking geometry?
Do suspension seatposts significantly alter the seatpost height? I currently own a 1997 Cannondale hardtail and I would really like to prevent my spine from someday poking through the top of my helmet. But I'm worried about altering that sweet-spot seat height that has so graciously prevented knee pain thus far during long rides. Preston Fall Vancouver, British Columbia
I've used suspended seatposts for three or four years and am a big advocate of them. Most (not all) of the advantages of a true dualie, but they're lighter, cost less, and are easy to upgrade. I've used the U.S.E. post, now called the U.S.E Alien ($139). It combines a spring with a rubber bumper for good bump-absorbing capability and fast return. Heavy or light riders can replace the bumper with one better suited to their riding style and weight. Installation is easy-it's just like replacing a regular seatpost, the only difference being that you'll probably also need a plastic shim that goes inside the seat tube.
Rockshox also makes a good suspended post that sells for only $70, though it lacks the spring of the U.S.E. post and is rubber-only. Still, it's an inexpensive, worthwhile upgrade.