Dump truck tires: steer, drive and trailer choices, the rules and the cost per mile
Steve Woods · Truck Dispatcher, TruckSprint
Steve Woods is a truck dispatcher with 9 years of experience in trucking. He reviews every guide we publish. How we research and update guides.
Updated October 2026
Quick answer
Dump truck tires are chosen by position: rib steer tires with cut resistance, deep lug drive tires for site traction, and mixed-service tires that handle both highway and dirt. Federal rules require 4/32 inch of tread on steer tires and 2/32 inch on the rest, and no tire may carry more than its sidewall rating.
Source: 49 CFR 393.75 (eCFR); ATRI 2025 data · checked 2026-10
Dump truck tires live a harder life than highway tires: rock on the haul road, mud in the pit, loaded weight on every trip out. I'm Steve Woods, a truck dispatcher at TruckSprint with 9 years in trucking. Here's how to pick tires by position, read what's on the sidewall, stay legal and know what they really cost you per mile.
Tires by position
| Position | Tread | What it has to do |
|---|---|---|
| Steer | Rib, often with cut and chip resistant compound | Carry the front axle, steer straight, shrug off rock |
| Drive | Deep lug, open shoulders | Pull a loaded truck out of a wet pit or up a ramp |
| Lift (pusher) axle | All-position or trailer rib | Carry load only when down; sees scrubbing on tight turns |
| Trailer (end, belly, side dump) | Trailer or all-position, mixed service | Carry each tandem's load, resist curb and rock damage |
Mixed-service tires, marked for on/off-road use, are the usual choice for trucks that leave the pavement every day. Pure highway tires wear well on asphalt but cut and chunk on construction sites.
Dump truck steer tires
The steer axle carries the engine, the front of the body and, on many dump trucks, more of the load than people expect. Steer tires need two things: a load rating that covers the front axle when you're loaded, and a tread that won't chunk out on rock.
Some heavy dump trucks run wider steer tires so the front axle can carry more. Whatever the size, the federal rule is the same: each tire's load must stay within its sidewall rating. That means checking the scale ticket for your loaded front axle and dividing it by two.
- Loaded steer axle, from a scale ticket
- 18,000 lb
- Tires on the axle
- 2
- Each tire must be rated for at least
- 9,000 lb
- Rating marked on the sidewall (at the stated inflation)
- Read it, don't guess
49 CFR 393.75(g): no tire may carry more weight than marked on its sidewall. Axle weights and the legal limits for your setup are in the axle weight calculator.
Reading the sidewall
A commercial tire's sidewall tells you most of what matters. Michelin's own page, for example, lists one mixed-service steer size as 315/80R22.5 LRL 158/150K:
| Marking | Means |
|---|---|
| 315/80R22.5 | Section width 315 mm, 80% aspect ratio, radial, for a 22.5 in wheel |
| LRL | Load range L, the old "ply rating" scale; higher letters carry more |
| 158/150 | Load index when mounted single / in duals; look up the pounds in the maker's data book |
| K | Speed symbol |
| M+S, 3PMSF | Mud and snow, and the three-peak mountain snowflake for severe snow |
Source: Michelin UK business site, X Works Z2 315/80R22.5, read Oct 27, 2026 · checked 2026-10
The maker's data book also gives the load at each inflation pressure. Running underinflated lowers what the tire can safely carry, so check pressure cold, before the first load.
The federal tire rules
Under 49 CFR 393.75, no motor vehicle may run on a tire that:
- has body ply or belt material exposed through the tread or sidewall,
- has any tread or sidewall separation,
- is flat or has an audible leak, or
- has a cut deep enough to expose ply or belt material.
Source: 49 CFR 393.75, Tires (eCFR) · checked 2026-10
Tread depth: at least 4/32 inch on the front wheels of a truck, and 2/32 inch on all other tires, measured in a major groove away from tie bars and humps. Regrooved tires rated to carry 4,920 lb or more can't go on a truck's front wheels. And no tire may carry more weight than its sidewall marking allows.
What dump truck tires cost per mile
Purchase price is only part of it. What matters is the cost per mile over the tire's life: price and mounting, minus what the casing brings back for retreading, divided by the miles the set lasts.
Tire cost per mile, tri-axle dump. EXAMPLE inputs, use your quotes
$0.075 per mile, $75 per 1,000 miles
ATRI's 2025 average for all trucks was $0.050 per mile. Dump work on site roads often wears tires faster, so trust your own records over any average.
The default EXAMPLE works out to about $0.075 per mile. ATRI's 2025 survey put tires at $0.050 per mile across all trucks it tracks, mostly tractor-trailers on the highway.
Source: ATRI, An Analysis of the Operational Costs of Trucking (2025 data), as reported by FreightWaves 2026-07-15 · checked 2026-10
Put the number into your budget with the maintenance reserve calculator, so a set of drives doesn't land as a surprise.
Making dump truck tires last
- Weigh, don't guess. Overloaded axles wear tires fast and break the law; check with the axle weight calculator.
- Keep the site road in mind. Slow down on rock, avoid spinning drives in the pit, and keep tires off sharp edges at the dump.
- Lift axles down only when loaded, and up for tight turns where the maker allows; scrubbing a lift axle across a turn eats tread.
- Match duals. Mismatched diameters on a dual pair make one tire carry more.
- Protect the casing. A good casing is worth money at retread time; run it to the legal minimum on the wrong tire and it's scrap.
More axles mean more tires to buy; compare setups in tri-axle vs quad vs quint.
Best dump trailer tires: how to choose
No single tire is best. Pick in this order:
- Load rating for each tandem's legal weight, single or dual as mounted.
- Position: trailer or all-position, mixed service if you dump off pavement.
- Casing: retreadable, if you keep trailers long.
- Small utility dump trailers: ST (special trailer) tires sized for the trailer's GVWR, not passenger tires.
TruckSprint no longer dispatches dump trucks. If you also run a 26 ft box truck, our desk can keep it loaded.
Sources
- 49 CFR 393.75, Tires (eCFR)
- Michelin UK business site, X Works Z2 product page, read October 27, 2026
- ATRI, operational costs of trucking, 2025 data (via FreightWaves, July 15, 2026)