Wheel Fitment Guides
BYD Shark 6 wheel fitment: 6×139.7, 66.1 mm bore, 18×8J
Most quotes get the stud pattern right. It is the part a supplier can quote from memory; the bore decides whether the wheel actually drops onto the hub, and here it is smaller than most wheels cut to that pattern.
The vehicle’s own numbers
BYD lists one wheel for the Shark 6 line-up, and it is the same wheel whichever version you order. The figures below come off the factory sheets where BYD publishes them, off what fitting shops quote where it does not, and the bore comes from a shop that mounts wheels on the vehicle rather than from a database.
| Item | Value | Notes |
|---|---|---|
| Bolt pattern | 6×139.7 | Six studs on a 139.7 mm circle |
| Hub bore | 66.1 mm | Smaller than the common 106.1 mm bore in this pattern |
| Original rim | 18 × 8J | Alloy; 18-inch steel spare |
| Offset | Not published by BYD | Australian fitters quote about +30 to +35 for aftermarket fitment |
| Tyre | 265/65 R18 | Same size across variants |
| Wheel nut | M14 × 1.5 | 140 Nm |
Public fitment databases still show 106.1 mm and 64.1 mm for this model; the note at the end covers why.
Pattern and bore are two separate promises
The pattern says where the holes go. The bore says whether the centre of the wheel sits on the hub spigot. In this pattern the bore runs from about 66 mm to 108 mm depending on the vehicle — a Hilux is 106.1 mm, this one is 66.1 mm — so it belongs to the model, not to the pattern.
The direction that works
A wheel bored 106.1 mm drops onto this hub with a locating ring of 20 mm wall — (106.1 − 66.1) ÷ 2. The ring centres the wheel; it does not change the bore the wheel was machined with.
The direction that does not
A wheel bored 66.1 mm will not go onto a 106.1 mm hub at all. No ring closes a gap in that direction, because there is no material to remove.
Both can be correct products. What differs is how they behave as stock: a 106.1 bore with a ring set covers this vehicle and most of the pattern, while a 66.1 bore cut as a fixed fitment is a single-model number that cannot be sold into Hilux stock.
The rim is the same across the range
The 2026 line-up splits the Shark 6 into three versions, and none of them changes the wheel. Cab-chassis, Premium and Performance all sit on 18×8J and 265/65 R18, so one part number covers the range.
| Version | Wheel and tyre |
|---|---|
| Dynamic cab-chassis | 18 × 8J, 265/65 R18 |
| Premium | 18 × 8J, 265/65 R18 |
| Performance | 18 × 8J, 265/65 R18 |
Scope: this page covers the Shark 6 only — BYD’s second pickup, the Mako, uses a different wheel whose dimensions are not published.
What goes on the order
- Nut seat. The seat is a property of the wheel, so the nut travels with the wheel rather than with the vehicle.
- Bore. 66.1 mm on the vehicle. Cutting 106.1 with a ring kit and cutting 66.1 fixed are two part numbers, not two variants, so decide before tooling.
- Offset. BYD does not publish it; Australian fitters quote about +30 to +35. Going wider than 8J splits the extra width half inboard and half outboard, so an 18×9 at the same offset sits about 12.7 mm further out and as much closer to the suspension.
- Diameter and the spare. 18-inch is the replacement size and the one the spare matches; 20-inch needs a fifth wheel.
- Finish. Matte black, satin black, black milled and gunmetal carry most of the pickup volume; gloss is a harder sell on a work vehicle.
If you are costing a mixed container for this vehicle, send the bore you intend to cut and the offset you want, and we will come back with what fits in the box.
Sources
- BYD Australia and BYD New Zealand published specifications for the Shark 6 cab-chassis, Premium and Performance — rim size, tyre and nut torque.
- wheel-size.com — bolt pattern, thread size and torque, per market.
- Hub bore 66.1 mm — reported by a wheel fitter that mounts aftermarket wheels on this vehicle. Public databases show 106.1 mm and 64.1 mm for the same model.
Data note
The bore is the one figure where published sources disagree. 106.1 mm is the bore of the Hilux and other large-hub vehicles in this pattern, and it appears to have been carried into this model’s entries; 64.1 mm is a BYD passenger-car bore from a different pattern. A wheel cut to the larger figure still mounts with a ring, so the error costs a ring. A wheel cut to 66.1 mm onto a vehicle that needs more will not mount at all. Measure the hub in front of you before committing to tooling.
Dimensions are given as published by the sources above and are not a substitute for a test fitment on the vehicle.