The Short Version
- 4×100 with a 54 mm hub bore. The 4×114.3 figure that circulates for this car is wrong.
- Unchanged across three generations. HA11S, HA21S and HA36S all return the same numbers, at the same +45 offset.
- Only the diameter grew: 14×4.5J on the 1990s cars, 15×4.5J on the HA36S.
- The HA36S is nowhere near US-eligible. First cars qualify in December 2040.
Settling the Conflict
Our own backlog carried both 4×100 and 4×114.3 for the Alto Works, and we could not tell which was right. It is 4×100.
We checked three separate grade pages spanning three generations: the HA11S Suzuki Sport Limited (1998), the HA21S RS/Z (1997) and the HA36S base grade (2015). All three return PCD 100 mm, 4 holes, 54 mm bore, at +45 offset.
The 4×114.3 claim is worth understanding rather than just dismissing, because it is not random — 4×114.3 genuinely does appear on some Japanese kei vehicles. The Mitsubishi Minicab is 4×114.3, and so is the Suzuki Cappuccino, which is a Suzuki kei sports car and therefore very easy to confuse with an Alto Works. But the Alto Works is not one of them.
Factory Specification
| Generation | Chassis | Period | Grade | Wheel | Tyre | PCD / Holes / Bore |
|---|---|---|---|---|---|---|
| HA36S | DBA-HA36S | 2015.12–2017.05 | 2WD base 5AT | 15×4.5J +45 | 165/55R15 | 100 / 4 / 54 |
| HA21S | GF / E-HA21S | 1997.04–1998.10 | RS/Z 2WD 4AT | 14×4.5J +45 | 155/55R14 | 100 / 4 / 54 |
| HA11S | E-HA11S | 1998.01–1998.10 | Suzuki Sport Limited 2WD 5MT | 14×4.5J +45 | 155/55R14 | 100 / 4 / 54 |
4.5J Is the Real Constraint
Every Alto Works generation runs a 4.5J rim, which is narrow even by kei standards, and it is why these cars look under-tyred next to their arches from the factory.
The practical window is 15×5.5J to 15×6J in the +35 to +45 range. That is a genuine improvement on a car this light. Going wider than 6J starts to need arch work, and in Japan it will also put the tyre outside the body, which kei registration does not allow.
That last constraint disappears the moment the car is exported, which is why overseas Alto Works builds look nothing like Japanese ones.
54 mm hub rings are required with almost any aftermarket 4×100 wheel.
Importing: Be Realistic
The HA36S ran from December 2015 to November 2021. Against the US 25-year rule that puts the earliest cars at December 2040 and the last at November 2046. This car is between fourteen and twenty years away from American eligibility.
The 1990s Alto Works — HA11S, HA21S, HA22S — are a completely different story and are fully eligible now. If you want an Alto Works in the United States, that is the one you can actually have.
Canada’s fifteen-year rule brings the HA36S in from 2030 onward. UK and Australian buyers have their own routes and in practice a much easier time.
What We Could Not Verify
- The HA21S four-wheel-drive grade specifically. Its page exists; we did not open it.
- HA36S turbo, CVT and four-wheel-drive variants beyond the one 2WD grade we opened. Kei platform convention suggests no change across drivetrains, but we did not confirm it.