Industry-Leading Commercial Truck Alignment Shims And Wedges.
Delivered. In-Stock. At The Lowest Prices.
Commercial Truck Alignment Shims, Caster Wedges & Wheel Weights — Manufacturer Direct
Synergistic Supply manufactures heavy-duty alignment shims, caster wedges, and steel adhesive wheel weights for commercial trucks, and sells them at prices the big brands can't touch.
Why so cheap? Because we came out of the shop world. We used these same parts every day, paid the big brands' prices, and knew they were grossly overpriced — so we started making them ourselves. That was ten years ago, and our prices have barely moved since. No middlemen, no layers of markup — parts sold direct from the manufacturer.
Alignment shims — Freightliner single-slot, Peterbilt Air Leaf, Kenworth Air Glide "Eight Bagger" spacers, International torque arm shims, and universal caster/camber shims. Steel, zinc plated, in the thicknesses alignment shops actually use.
HD zinc caster wedges — the only slotted break-away wedges on the market. One set covers three axle widths, so one part does the job of three.
Steel adhesive wheel weights — 1 oz and 1/2 oz for truck tire balancing.
How to order: call or text 469-215-7730, or email customerservice@synergisticsupply.com. Most orders ship the same or next business day from Itasca, Texas. Pay by card from your invoice, or by Zelle.
Frequently Asked Questions
What does an alignment shim do?
An alignment shim slides behind the wheel hub to correct camber and caster angles on a commercial truck, so the tires wear evenly and the truck tracks straight.
What is a caster wedge used for?
A caster wedge goes between the axle and the leaf spring to change the caster angle on a steer axle. Ours are heavy-duty zinc, slotted and break-away — one set covers three axle widths, and no one else makes them that way.
Do zinc caster wedges break?
Only when a Z-block or H-block spacer concentrates the load on one spot. Use a flat spacer plate to spread the load and they hold up fine - we can get the plates for you.
How do I order?
Call or text us at 469-215-7730, or email customerservice@synergisticsupply.com. Pay by card from your invoice, or by Zelle — whichever suits you.
How fast do orders ship?
Most orders ship the same or next business day from Itasca, Texas.
Do you sell wheel weights?
Yes — steel adhesive wheel weights in 1-ounce and half-ounce sizes, by the box.
Why are your prices so much lower?
We manufacture our own shims and wedges instead of buying through distributors, so there's no middleman markup — and we've held our prices flat while the big brands raised theirs year after year.