A dually puts the hub, the cap, and the lug nuts a long way out of the wheel, and that is what decides whether a rim clamp will sit on one. The number that matters is hub clearance, which is how far that hardware stands past the rim edge. It is not the wheel offset, and it takes a straightedge, a tape, and about a minute to find.
Step 1. Measure Your Hub Clearance
Lay a straightedge across the wheel, bridging from one rim edge to the other across the center.
It sits flat on the rim. The hub is recessed, so your hub clearance is zero and any clamp fits. You are done.
The hub holds it up. Measure that gap at the rim edge. That is your hub clearance.
Measure the wheel you intend to clamp. Front and rear wheels on one truck are not always the same part. Work in millimeters, since the differences here are small.
Step 2. Check It Against Your Clamp
Every clamp holds its arch a fixed height above the rim edge, and that height is the most hub clearance it can take. Longer pins raise it. Find your clamp in the table, then read across to the pins that cover your hub clearance.
| Your clamp | Hub clearance on the pins in the box | Hub clearance with the EX4 set |
|---|---|---|
| ASWG001 and ASWG001TC | up to 93 mm, 3.7 in | up to 135 mm, 5.3 in |
| ASWG002 | up to 78 mm, 3.1 in | up to 120 mm, 4.7 in |
More than the second figure and the clamp is the wrong tool for that wheel. Within five millimeters of either figure, step up a size, because these are bench numbers with no allowance built in.
Step 3. Order One Set Per Clamp
All four pins on a clamp have to match, so each clamp takes its own four-piece set. Two clamps means two sets.
Both lengths are options on the same replacement rim locators page, so check the length before you check out. The swap buys 42 mm on either clamp. Keep your standard pins for ordinary car wheels.
If the Hub Is Too Tall
Most of the height bolts on rather than being built in.
- Stainless hub covers with spiked lug nut covers, four to five inches
- Deep chrome covers on 19.5 inch wheels, four to five inches
- Manual locking hubs on older four-wheel-drive trucks, four to six inches
Take the cover off, measure again, and the wheel underneath is usually fine. A tire clamp is not the way around it, because it clears only about 1.5 inches of hub, which is tighter than the rim clamp on standard pins.
What a Dually Costs You Elsewhere
Toe plates will not sit against a wide-offset wheel, and no accessory fixes that. On most duallys the rear wheels are the offset pair, so you lose thrust angle. The rear axle is solid, so there is nothing to adjust back there anyway.
Camber, caster, and kingpin inclination all still read from the clamp once the pins clear the hub. Check what your truck wears at the front before ordering alignment toe plates, and pair the clamp with the camber, caster, and KPI gauge.