Reference
Hitch ball size & torque chart
Written by Hemant RawatLast reviewed July 2026How we verify
Pick the right ball, then torque it correctly. Two things must both be right: the ball diameter has to match your coupler exactly, and its rating has to cover your trailer's weight.
| Ball diameter | Shank diameter | Typical GTW rating |
|---|---|---|
| 1-7/8" | 3/4"–1" (5/8" on light-duty) | ~2,000–3,500 lb |
| 2" | 3/4"–1-1/4" | ~3,500–12,000 lb |
| 2-5/16" | 1"–2" (2" on gooseneck) | ~6,000–30,000 lb |
| 3" | 2" | up to ~30,000 lb |
Ball torque by shank size
Tighten the ball nut to the spec for its shank (stem) diameter:
| Shank diameter | Torque |
|---|---|
| 3/4" | 160 ft-lb |
| 1" | 250 ft-lb |
| 1-1/4" | 450 ft-lb |
These are the standard manufacturer values (CURT, Draw-Tite). The authoritative torque is whatever is printed on your specific ball’s packaging or label, since it can vary by construction and thread — use a torque wrench.
The two rules for choosing a ball
Two independent checks, both required. (1) The ball diameter must exactly match the size stamped on your coupler — a ball too small can let the trailer come off, one too large won’t let the latch close. (2) The ball’s stamped weight rating must be at or above your trailer’s gross weight; two balls of the same diameter can carry different ratings, so matching diameter alone is not enough.
Then level and load
With the right ball on the right hitch class, size theball-mount drop or rise so the trailer tows level, and confirm your tongue weight is in range.
Sources
- Draw-Tite — Hitch balls — torque specifications
- CURT Manufacturing — Trailer balls — learn more (sizes & capacities)
- Proven Industries — Hitch ball torque guidance
- Weigh Safe — Choosing your trailer ball hitch size — a step-by-step guide
- Big Tex Trailer World — Hitch and ball sizes
Values are summarized from public references and were last verified July 2026. See ourmethodologyfor how we source and verify; manufacturer rating labels and your owner's manual always take precedence.