Three tons is the default recommendation for a car, and for once the default is right. A single stand under one corner of a 3,500 lb sedan carries somewhere around 1,000 lb. Three tons is 6,000 lb. There is plenty of margin.
The complication is that "3 ton" on the box can mean two different things, and the difference is a factor of two.
Per pair or per stand: read it before you buy
| Stand | Headline rating | Basis | Per-stand capacity |
|---|---|---|---|
| Torin T43002A | 3 ton | Per pair | 1.5 ton (3,000 lb) |
| ESCO 10498 | 3 ton | Per stand | 3 ton (6,000 lb) |
Both are fine under a car. Neither listing makes the basis obvious, and the retail description is often wrong where the manufacturer's specification is right. Our rule: find the figure on the stand's own casting or label, and if there is any ambiguity assume the lower interpretation. Jack stand weight ratings explains why this particular number causes so much trouble.
Height is usually the real constraint
Almost every "are 3-ton stands enough" question turns out to be a height question in disguise. Torin's 3-ton stands reach 16-3/4 in. A half-ton pickup's frame rail can sit above that before you lift it at all. No amount of capacity solves that, and extending a stand to its absolute maximum to reach the car is the wrong way to solve it either.
The rule of thumb: if you have to wind the stand out past about 80% of its travel to reach the support point, buy taller stands.
Match the pair to the jack, and to each other
Two things. First, the stand's minimum height must be reachable by your jack with margin — a 14 in jack and a 13.2 in stand is technically possible and practically miserable. Second, both stands must be set to the same height, which is easier with fine increments: Hein-Werner's 11/16 in steps beat a coarse ratchet for this, and a pin-and-post design with defined positions is the easiest of all to match.
Saddle shape, for a car
Curved axle cradles are designed for a round solid axle. Under a flat unibody sill or subframe they touch on the edges. A flat saddle — ideally rubber-faced, like ESCO's removable pad — spreads the load properly. If your car has pinch welds, the same thinking applies as with a jack: see the pinch weld guide.
The short version
- 3 ton is the right rating for any normal car — the margin is large
- Check whether the rating is per pair or per stand before buying
- If you have to extend past ~80% of travel, buy taller stands instead
- Match both stands to the same height; fine increments make that easier
- A flat saddle suits a unibody car better than a curved axle cradle