Sullivan S843 - Marcy Jones Marvelous Wheel Chocks XLSullivan 843 Marcys Marvelous Wheel Chocks XL Those with larger planes will now be able to take advantage of Marcys Marvelous Wheel Chocks. The new XL Wheel Chocks are 25% larger and have 7 tie down points built in for those that need the extra security. Depending on wheel size and gear angle the chocks can fit either inside or outside of the tires, and will accommodate most axle sizes. Sold in pairs (2). The new XL Wheel Chocks look just as