Works great on trailers up to 3,000 lbs and with tires up to 28" diameter. maximum Bearing up to 3000 lbs raises an axle up to 8-inches when fully extended Fits most 13 inch, 14 inch and 15 inch wheels with up to a 28 inch tire diameter Activity board It has a movable adjusting surface, which can better fit the tire curvature that needs to be improved, and ensure that all vehicle tires of different sizes can be used. Increased contact surface The upgraded Light RV Tire Leveler, which increases the steel plate of the ground contact area, better increases the friction and anti-skid effect, and ensures that it can play a role on the ground of any terrain. Rubber protection The rubber protective sleeve better protects the tires, increases friction, and makes handling more convenient. Easy Leveling RV wheel levelers allows easy leveling without blocks or ramps, Light trailer tire Leveler can be used with the single tire locking chock Raises Trailer Axle RV Leveling Kit have solid construction,maximum Bearing up to 3000 lbs,raises an axle up to 8-inches when fully extended Adaptation Specifications Compatibility RV levelers designed for light, single axle trailers only, can be used to turn the drive screw, elevating or lowering the tire lifting pads to the level position Adjustable baffle allow the RV tire trailer leveling to more accurately fit the tire and provide stability,corrosion-resistant finish for long life, must be used with industrial lubricants