Item No HSP-108870 CNC-machined premium-quality aluminum set-up wheels for 1/8 off-road cars allow for perfectly precise and repeatable set-up adjustment and tweak correction. Eliminates set-up errors inherent in using standard off-road tires. Precision-machined to exacting tolerances, each alu set-up wheel in a set is perfectly matched. Suspension set-up, ride height setting and checking tweak using standard rubber tires typically gives non-precise and non-repeatable measurements. Rubber tires with foam inserts are never perfectly round, so when checking and setting up suspension geometry, ride height or tweak it is important to have all four sides of the car to be exactly the same size and perfectly round. The alu set-up wheels are one of the most important and basic set-up tools when performing a professional car adjustment. This set of set-up wheels can be also used for a 1/8 Rally Car or 1/8 Truggy (not for ride height). Related products: #107717 Chassis Ride Height & Droop Gauge 0 to -13 mm for 1/8 Off-Road #107751 HUDY Quick Camber Gauge for 1/8 Off-Road 1¢X, 2¢X, 3¢X