BYD Da Tang mismatched wheels are now a growing owner complaint in China. Some owners of the 950 km RWD version of BYD’s flagship Dynasty SUV say their cars left the factory with the wider rear rims fitted at the front and the narrower front rims at the rear, while the tyres stayed in their original positions. CarNewsChina’s report on the BYD Da Tang wheel complaints, citing the BYD-focused outlet 3YC User Report, says owners describe abnormal handling, excessive tyre wear and even blowouts.
BYD had not officially acknowledged the issue when that report was published on 8 November 2026 European time. No recall has been announced.
What is wrong with the BYD Da Tang wheels?
The BYD Da Tang 950 km RWD should run 255/50R20 tyres on 8J rims at the front and 275/45R20 tyres on 9J rims at the rear. Owners and dealer inspections reported by 3YC User Report found the rims swapped: 9J rims at the front and 8J rims at the rear, with tyre positions unchanged.
That swap matters because the RWD version uses a staggered layout, with wider wheels and tyres at the back. In “8J” and “9J”, the number is the rim width in inches and the letter describes the flange profile. A one-inch change in rim width may sound minor, but it changes how a tyre’s sidewall and tread sit on the wheel.
Owners have aired complaints on social media and filed reports on 12365auto.com, a Chinese consumer complaint platform for cars. 3YC User Report says it is not a one-off case. The complaints relate only to the 950 km RWD trim; the dual-motor AWD version is not mentioned.
Is the BYD Da Tang wheel mix-up dangerous?
It can be. Under European Tyre and Rim Technical Organisation guidance cited by CarNewsChina, the front 255/50R20 tyre fits rims from 7J to 9J, so the 9J front rim is within range but at the edge. The rear 275/45R20 tyre needs 8.5J to 10.5J, so mounting it on an 8J rim is outside the approved range.
When a tyre is fitted to a rim that is too narrow, its contact patch, steering response and sidewall support are affected, CarNewsChina explains. CarNewsChina says this can cause instability in corners and at high speed, and the stability-control system may not be calibrated to compensate.
| Position | Correct tyre and rim | Reported fitment | Tyre’s approved rim range (ETRTO) | Within range? |
|---|---|---|---|---|
| Front | 255/50R20 on 8J | 255/50R20 on 9J | 7J to 9J | Yes, at the upper limit |
| Rear | 275/45R20 on 9J | 275/45R20 on 8J | 8.5J to 10.5J | No, 0.5 inch too narrow |
The rear is the bigger concern. On a rear-wheel-drive car, the rear tyres also carry the drive torque. A strong electric motor sending torque through tyres mounted on rims narrower than the approved range adds load to the part of the fitment that is already out of specification.
BYD Da Tang Mismatched Wheels: How can Da Tang owners check their rims?
Owners of a Da Tang 950 km RWD can compare the rim width markings on the front and rear wheels. The rear wheels should be the wider 9J rims carrying 275/45R20 tyres. If the front rims are 9J and the rear rims are 8J, the car matches the reported fault and should be inspected.
A rim width self-check guide is circulating among Da Tang owners in China, according to CarNewsChina. Rim width is usually stamped on the wheel, often on the inside of the spokes or near the valve, so a tyre shop or dealer can confirm it quickly.
Practical steps for affected owners:
- Check the tyre size on each sidewall and the rim width on each wheel.
- If the rims appear swapped, avoid high speeds and hard cornering until a dealer inspects the car.
- Photograph the markings and keep service records, which help with any complaint or claim.
- Ask the dealer to inspect tyres for uneven wear or sidewall damage, not just to swap rims.
BYD Da Tang wheel issue: what is confirmed and what is not?
Reported: multiple owners describe swapped rims on the 950 km RWD trim, supported by dealer and owner inspections, social posts and 12365auto complaints. Not confirmed: how many cars are affected, the production period, BYD’s explanation, any free fix, and whether the blowouts were caused by the fitment.
| Item | Status on 9 November 2026 |
|---|---|
| Rims swapped on some 950 km RWD cars | Reported by owners, 3YC User Report and CarNewsChina |
| Complaints filed on 12365auto.com | Reported |
| Rear tyre on rim narrower than ETRTO range | Calculation from published sizes |
| Owners report handling issues, wear and blowouts | Owner claims; not independently verified |
| Number of affected cars | Unknown |
| Official BYD acknowledgement | None as of the report |
| Recall or service campaign | None announced |
How popular is the BYD Da Tang?
The Da Tang, also called the Great Tang, launched in mid-July 2026 as the flagship of BYD’s Dynasty line-up, starting at 239,900 yuan (about $35,900). It offers 105.8 kWh and 130.2 kWh LFP batteries, up to 950 km CLTC range, and BYD’s Flash Charging technology. BYD delivered 10,997 in China in September.
| BYD Da Tang | Detail |
|---|---|
| Launch | Mid-July 2026, China |
| Starting price | 239,900 yuan (about $35,900) |
| Drivetrains | Single-motor RWD; dual-motor AWD |
| Batteries | 105.8 kWh and 130.2 kWh LFP |
| Range | Up to 950 km CLTC (about 770 km WLTP) |
| Charging | BYD Flash Charging support |
| Affected trim (reported) | 950 km RWD with staggered 20-inch wheels |
| September 2026 China deliveries | 10,997 (China EV DataTracker) |
CarBike Insight Analysis
This looks like a quality-control slip rather than a design flaw, but it is still serious. Staggered wheels add an extra step on the assembly line: the plant must fit the correct rim to the correct axle. If the rims were swapped as reported, the error was not caught by end-of-line inspection either. That points to a process gap worth BYD’s attention.
The fix itself should be simple: refit the correct rims and replace damaged tyres. The harder part is trust. Owners are asking for a full set of new rims and tyres, a full inspection and an extended warranty on chassis components, CarNewsChina reports. How BYD responds will show how it handles quality complaints at the top of its range, as it pushes further into premium models.
Buyers should avoid assuming every Da Tang is affected. Only one trim is reported, and no figure exists. But anyone with a 950 km RWD car should check the wheels now rather than wait for an official notice.
What should BYD do next?
Three signals will show whether this becomes a wider quality story. First, a BYD statement explaining how many cars were affected and when. Second, a free dealer inspection and refit programme, with tyre replacement where damage is found. Third, whether China’s market regulator, the State Administration for Market Regulation, files any recall notice.
Until then, the facts are limited to owner reports, dealer inspections described by 3YC User Report and the published tyre and rim sizes. Any BYD response or recall filing would change the picture quickly. Readers with a Da Tang should treat any owner-group guide as a starting point and get the final check done by a dealer or tyre specialist.
For more on BYD’s flagship push, read our BYD Seal 07 Gen 2 China launch story and our BYD October 2026 sales analysis. For a recent owner-focused safety case, see our Toyota Land Cruiser fuel leak recall guide.
FAQ
Which BYD Da Tang version has mismatched wheels?
Reports cover only the 950 km RWD trim, which uses staggered 20-inch wheels. Owners say 9J rear rims were fitted at the front and 8J front rims at the rear, with tyres left in their original positions.
Has BYD recalled the Da Tang over the wheel problem?
No. As of CarNewsChina’s 8 November report, BYD had not officially acknowledged the issue, and no recall or service campaign has been announced. Owners have filed complaints on the 12365auto.com platform.
Why is a narrow rear rim a problem on the Da Tang?
The 275/45R20 rear tyre is approved for 8.5J to 10.5J rims. On an 8J rim it is outside that range, which can affect sidewall support, contact patch, steering response and stability at speed or in corners.
Is the BYD Da Tang sold outside China?
The Da Tang discussed here is the China-market flagship launched in July 2026. These complaints come from Chinese owners, and no affected export cars have been reported. Owners elsewhere should still check rim widths if their car uses staggered wheels.
What tyre and rim sizes should the BYD Da Tang 950 km RWD use?
The 950 km RWD should run 255/50R20 tyres on 8J rims at the front and 275/45R20 tyres on 9J rims at the rear. Owners reported those rim widths swapped, with the tyre positions left unchanged.
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