Steer
Truck & Bus Radial
D603
Four wide ribs and the deepest steer tread here — 17 mm on a 236 mm face.
Where D601 spreads itself across a whole fleet, D603 is a dedicated steer tyre. Four wide circumferential ribs, no shoulder blocks to saw, and the widest tread face of any 22.5" pattern in the range at 236 mm on 295/75R22.5 — the geometry you want when shoulder wear is what takes steers off the truck early.
Axle positionSteer
ConstructionTL (tubeless)
Sizes listed2
Ply ratings16PR
Tread depth17 mm
Max load, single3,000 kg
Sizes11R22.5295/75R22.5
01 Specification
D603 — every listed size.
Nominal values. Overall diameter ±2 %, section width ±4 %.
| Size | PR | Type | Rim | O.D. mm | Sect. mm | SLR mm | Depth mm | Tread mm | Infl. single kPa/psi | Infl. dual kPa/psi | Load single kg/lb | Load dual kg/lb | LI / SI |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 295/75R22.5 | 16 | TL | 9.00*22.5 | 1016 | 272 | 471 | 17 | 236 | 830/120 | 830/120 | 3000/6610 | 2725/6010 | 146/143M |
| 11R22.5 | 16 | TL | 8.25*22.5 | 1053 | 278 | 489 | 17 | 227 | 830/120 | 830/120 | 3000/6610 | 2725/6010 | 146/143M |
02 Where it belongs
Best fitted to
- Regional haul steer axle
- Paved routes with frequent cornering
- Fleets fighting irregular shoulder wear
03 What the numbers mean
- Widest face
- 236 mm tread width on 295/75R22.5 — 9 mm more than D601 at the same rim.
- Full depth
- 17 mm across both listed sizes.
- Two sizes, no ambiguity
- 295/75R22.5 and 11R22.5, both 16PR TL, both 146/143M.
04 Elsewhere in the range
Other patterns.
01
Steer / All Position
D601
Five-rib highway pattern. The widest size and load coverage in the range.
View pattern
02
Drive
LS751
Closed-shoulder drive block. 20.5 mm — the deepest tread in the range.
View pattern
03
Trailer / All Position
LS653
Deliberately shallow rib — 10.5 mm — built to run cool and roll free.
View pattern
Steer / All Position
D601
Five-rib highway pattern. The widest size and load coverage in the range.
View pattern
02
Drive
LS751
Closed-shoulder drive block. 20.5 mm — the deepest tread in the range.
View pattern
03
Trailer / All Position
LS653
Deliberately shallow rib — 10.5 mm — built to run cool and roll free.
View pattern
Enquiries
Tell us the axle, the size and the volume.
Send the sizes you are quoting and the quantity you need, and you get back availability, ply-rating options and terms — not a brochure.
- Pattern and size availability
- Ply rating and load/pressure options
- Packing, container loading and lead time
Prefer plain email? info@rocklandtiresupply.com