BYD Seagull Winter Tyres: Season Isn't a Size Match

BYD Seagull winter tyres: seasonal performance doesn't replace a size match

Scope: China-mainland 2026 Seagull; official website file 260317; PDF pp. 127–128, "Winter tyres"

Temperature affects rubber performance

The manual explains that winter tyres use tread designs suited to low temperatures and perform accordingly on snow, and recommends using them in the matching season. A winter tyre label shows the product's purpose; it does not prove the tyre suits any vehicle, nor that it will perform the same when used on into warmer seasons. Season and fitment are two separate judgements. ^[1]

Check several fields when choosing

This car's manual requires winter tyres to keep the originally designed size, load index and speed rating, and to have enough tread depth. When asking for a quote, give the tyre markings and vehicle configuration of the actual car, and have the supplier or workshop confirm the approved option; don't accept a substitute just because the rim diameter is the same, and don't lower the rating yourself based on how the tread looks. ^[1]

Checks after fitting still matter

After winter tyres are fitted, check the pressures to this car's design requirements, and handle tyre monitoring and wheel position requirements according to the configuration. This article gives no tyre-changing procedure, wheel torques or upgrades to non-original sizes. Driving on snow still needs a suitable speed and a safe following distance; seasonal tyres cannot remove the risks of ice, excessive wear or driver error. ^[1]

Sources

[Source 1] BYD China official website: 2026 Seagull Owner's Manual (in Chinese) (public PDF on the official website)
https://www.byd.com/material/domestic-official/user-manual/ocean/2026%E6%AC%BE%E6%B5%B7%E9%B8%A5%E7%94%A8%E6%88%B7%E6%89%8B%E5%86%8C260317.pdf
Verified: 2026-10-03; page publication date not confirmed.

This article contains information-organising suggestions from the editorial team; it is not a manufacturer repair procedure.