Are you riding a flat course today and a hilly one tomorrow? Maximize performance and enjoyment by using the best cog for the trail. Just pop your wheel off your bike, remove your outside GearClamp and swap your cog out for another one. When you remove your cog, leave the inside GearClamp in place to preserve your chainline. Then reverse the process. If you carry a chain quick-link and one chain link, you can usually handle a few changes in tooth diameter, enough to change on the fly.
The GearClamp singlespeed kit weighs only 18 grams per set, compared to over 40 grams for some spacer kits.
The GearClamp singlespeed kit can be adjusted to perfectly match your chainline while your wheel is on your bike. Set it the first time, no trial and error