The Gear Alloy 737C Challenger chrome wheel is available in 18 and 20 inch sizes. The Gear Alloy 737C wheel is available in standard and lifted truck applications. The Gear 737C Challenger is available for most Jeep,s trucks and SUV's. Free shipping on Gear Alloy 737C Challenger wheels. Free lugs and locks included with the purchase of a set of 4 Gear Alloy 737C wheels.