HRS HD Wheelie Bar Tool

Wheelie Bar Measurement Builder

Measure your car at race-ready ride height on level ground. Enter inches in decimal form (½″ = 0.5). The drawing updates as you measure.

1 · Tire and wheel position Tire diameterEnter tire diameter to calculate axle height at half this value. Editing axle height updates this field instead. Axle heightGround to axle center. Enter this value to calculate tire diameter at twice this height. The last field edited controls both. Overall wheelie bar lengthHorizontal distance from axle centerline to rearmost edge of the 4″ wheel. Wheelie Bar to Ground ClearanceGround to bottom of wheel. We recommend as much wheelie bar to ground clearance as possible while allowing the wheelie bar slider assembly a full 4″ of upward travel without contacting the bottom of the car. Underside of car height at rear assemblyGround to lowest obstruction above the rear assembly. Full bar clearance still requires shop review.

2 · Mounting-hole measurements

Measure to the center of each mounting hole with the car at its intended ride height. Rearward distances are measured horizontally behind the axle centerline.

Ground to bottom mounting-hole centerVertical height from the ground to the center of the bottom mounting hole. Vertical spread between top and bottom mounting holesVertical height difference between hole centers, not the diagonal distance. Top mounting hole distance behind axle centerlineHorizontal distance from the axle centerline to the top hole center. Bottom mounting hole distance behind axle centerlineHorizontal distance from the axle centerline to the bottom hole center. Lower bar width at mountsHole-center width, for shop review of the two lower arms.

Live side profile

Blue = upper member · dark = lower assembly · orange = required 4″ overhead space. Side projection only.

Live top view · lower bar mounting width

W · Lower bar width at mounts—

Width is measured left-to-right between lower mounting-hole centers. Dark = lower arms · blue = upper member. Bends and rear connections are illustrative; this view does not specify bend locations or tube cut lengths.

Measurement results

Mount-to-wheel lengths run from each axle-bracket mounting-hole center to the wheelie-bar wheel axle center in side profile. They calculate directly from your measurements. Rear-connection spans use the shop geometry settings. These are not tube cut lengths or complete weldment envelopes. HRS must account for rod ends, bends, slider geometry, mounting width and adjustment range before fabrication.

3 · Send to Henderson Race Shop NameEmailPhoneVehicle / notes I measured the car at its intended ride height and understand HRS will review these measurements before building.

Submission sends a request; it does not place an order.