With CONDOR'S latest release, they continue their reputation for manufacturing high quality motorcycle/scooter wheel chocks. The smaller footprint in this new design is made especially with the Scooter Motor Bike in mind. The SCC4000 will also work well with Sport Bikes (crotch rockets). It is NOT recommended for cruisers, touring bikes, any large motorcycle, or an off road bike with a 21" diameter wheel. The larger footprint of Condor's SC2000 is more suitable for the larger motorcycle's. With most SCOOTER wheels falling into the 12" - 14" diameter range, the Condor SCC4000's smaller footprint meticulously captures the front tire. The adjustable locking mechanism (cradle) is identical to Condor's other two styles. It effortlessly and securely supports your scooter/motorcycle in an upright position on all transportation platforms. Just push or ride your scooter/motorcycle into the CONDOR and tying down the bike is a quick and secure procedure for one person. You will be amazed at how secure and safe your trailer ride will be once tied down in the Condor's cradle. Two tiedown straps in the rear of the scooter/motorcycle pulling forward into the chock is all that is needed. This unit comes complete with two removable mounting plates (2" x 11" x 3/8" thick) that bolts to the trailer floor or the pickup trucks bed. The wheel chock easily attaches and detaches to the plate in only a few seconds. All the necessary hardware for installation is included (instructions included).ANNOUNCEMENT: It's difficult to improve the quality of superior products, but Condor has managed to accomplish just that. Recently Condor redisigned the cradle/rocker, increasing the wheel chock's already excellent holding ability. The cradle now has wider fingers and features a "baked on" textured surface. Above is a picture of the NEW cradle. All the chocks we sell have the new cradle.