22.5×11.75 Tubeless Steel Wheel — Super-Single Trailer Position
The 22.5x11.75 tubeless steel wheel rim carries the 385/65R22.5 wide-base single tyre on trailer axles. Four catalogue configurations cover the 10×335, 8×275 and 10×285.75 bolt patterns in zero-offset and 120 mm-offset forms. Dimensions below are reproduced from our technical catalogue.
What the 22.5×11.75 is for
An 11.75-inch rim width is the standard rim for the 385/65R22.5 tyre — the super single trailer wheel 22.5x11.75 that replaces a pair of 22.5×8.25 or 22.5×9.00 duals on a trailer axle. One wheel and tyre per hub end instead of two saves unsprung weight; the trade-off is that each wheel carries the whole corner load, so load rating and mounting geometry matter more than on a dual fitment.
With a single tyre on the hub, offset is usually close to zero so that the tyre centreline falls near the hub mounting face and bearing loads stay balanced. Three of the four configurations below are zero-offset; the fourth carries a 120 mm offset for axles laid out around an offset wheel — read it against your axle drawing.
Catalogue configurations
| Bolt holes n×Ø (mm) | Bolt form | P.C.D (mm) | Centre bore (mm) | Offset (mm) | Rim t (mm) | Disc t (mm) | Weight (kg) | Std tyre |
|---|---|---|---|---|---|---|---|---|
| 10×27 | JSR18 ball seat | 335 | 281 | 0 | 7 | 12 | 47 | — |
| 8×21.5 | ISR16 | 275 | 221 | 0 | 7 | 10 | — | 385/65R22.5 |
| 10×20.5 | H1 hub-piloted | 285.75 | 221 | 0 | 7 | 12 | — | 385/65R22.5 |
| 10×26 | H1 hub-piloted | 335 | 281 | 120 | 7 | 13 | — | 385/65R22.5 |
Values as listed in the 22.5×11.75 rows of the technical catalogue; "—" = not listed, confirmed with the quotation. Tyre pairing for the 10×27 JSR18 model is confirmed with your enquiry.
Reading the four configurations
Mounting systems
- 10×27 JSR18 — ten stud holes on a 335 mm PCD with 281 mm centre bore, ball-seat (stud-located) form. Same pattern as the JSR18 listing on our 22.5×9.00 page — the natural super-single partner for fleets running that dual.
- 8×21.5 ISR16 — eight holes on 275 mm PCD, 221 mm bore; seat form per catalogue code ISR16 — confirm with your enquiry. The lighter eight-stud trailer pattern.
- 10×20.5 H1 — ten holes on 285.75 mm PCD (the North American hub-piloted bolt circle), 221 mm bore, hub-piloted (H1) form. The catalogue lists Ø20.5 holes here, smaller than the Ø26 usual for 22 mm studs — confirm stud size against your hubs.
- 10×26 H1 — ten holes on 335 mm PCD, 281 mm bore, hub-piloted. The ISO 335 hub-piloted pattern, here in the 120 mm-offset form.
Offset, disc and weight
- Offset — 0 mm on the JSR18, ISR16 and 285.75 H1 models; 120 mm on the 10×26 H1 model.
- Rim thickness — 7 mm on all four.
- Disc thickness — 10 mm (ISR16), 12 mm (JSR18 and 285.75 H1), 13 mm (10×26 H1 at 120 mm offset).
- Finished weight — 47 kg listed for the 10×27 JSR18 model; the other three on request.
- Seat type is the trap — a ball-seat nut on a hub-piloted wheel (or the reverse) will not clamp correctly even when the PCD matches; see the PCD and bolt pattern chart.
Load capacity
The catalogue does not publish a load rating for these models. The certified figure comes from the radial and cornering fatigue test report for the specific model, available on request. As a market reference, 22.5×11.75 tubeless steel wheels are typically rated 4,500–6,000 kg per wheel — see our steel wheel load rating guide for how those ranges are compiled.
The sizing arithmetic is short: two wheels per axle, so a 9-tonne trailer axle needs at least 4,500 kg per wheel. A 385/65R22.5 commonly carries load index 160 (4,500 kg single), reinforced constructions index 164 (5,000 kg); the lower of the wheel rating and the tyre rating governs the corner.
Disc thickness is the buyer's cross-check: heavier ratings come from thicker discs, hence the 10–13 mm spread here. Ask for disc thickness and finished weight on every quotation you compare; a markedly lighter wheel at the same claimed rating has lost material, usually in the disc.
Quality and certification
The wheels on this page are manufactured under IATF 16949:2016 — certificate No. 0504999 (manufacturing of steel and aluminum wheels) / group certificate No. 0599434. Certificate copies go out with the quotation and can be verified through the issuing certification body — see our IATF 16949 verification guide. Corrosion protection is pickling followed by cathodic electrophoretic coating; top-coat colour and disc marking are agreed at quotation stage.
What to send for a quotation
- Bolt pattern from the axle drawing — hole count, PCD, centre bore and seat type (ball-seat or hub-piloted); or simply the axle make and model.
- Offset — 0 or 120 mm for the catalogue models; anything else is a custom enquiry.
- Tyre size and load index you intend to fit, so the wheel rating can be checked against it.
- Quantity per configuration and destination port.
- Finish and marking — top-coat colour and any private-label stamping; see OEM & Custom for what can be specified.
- Inspection requirements — pre-shipment inspection or certificate copies required in the shipping documents.
Frequently asked questions
Is 22.5×11.75 the right rim width for a 385/65R22.5 tyre?
Yes. 11.75 inches is the standard rim width for the 385/65R22.5 wide-base single tyre. Some tyre manufacturers also approve a 12.25 rim; check the tyre maker's approved-rim list before pairing the tyre with any other width.
Which of the four configurations fits my trailer axle?
Match four items from the axle drawing: PCD (335, 275 or 285.75 mm), centre bore (281 or 221 mm), bolt form (ball-seat JSR18, ISR16, or hub-piloted H1) and offset (0 or 120 mm). A wheel that matches the PCD but not the seat type will not clamp correctly, so confirm the seat type with the same care as the bolt circle.
What load rating does the 22.5×11.75 tubeless steel wheel carry?
The catalogue does not list a rating for these models. As a market reference, 22.5×11.75 tubeless steel wheels are typically rated 4,500–6,000 kg per wheel. The certified figure for a specific model is stated on its fatigue test report, available on request.
Can I get a different offset, colour or private-label marking?
Non-catalogue offsets, top-coat colours and disc marking are handled as custom items and quoted case by case. The four standard configurations are supplied as listed in the catalogue table.
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