# CURT 40085 trailer ball (2-5/16 in ball, 1-1/4 × 2-5/8 in shank, 30,000 lb)

> What are the dimensions of the CURT 40085 trailer ball?

- Category: Tools & garage › Trailer balls
- Kind: Modern device
- Basis: Manufacturer specifications (Lippert (CURT))
- Page: https://xemstudio.com/objects/curt-trailer-ball-40085/ · JSON: https://xemstudio.com/api/geometry?object=curt-trailer-ball-40085 · Plain text: https://xemstudio.com/objects/curt-trailer-ball-40085/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's license
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width |
|---|---|
| 58.74 | 58.74 |

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- CURT part 40085 is a 2-5/16 in trailer ball on a 1-1/4 in diameter × 2-5/8 in long shank, rated 30,000 lb GTW.
- Ball and shank sizes are from the product title; rise, flat size and thread are not published.
- Ball-mount hole must match the shank diameter; shank length must cover the mount thickness plus washer and nut.
- True size, no printing tolerance added. Only published numbers are used; anything not published is said so.

## Sizes

| dimension | value |
|---|---|
| Ball diameter | 2 5/16 in (58.74 mm) |
| Shank diameter | 1 1/4 in (31.75 mm) |
| Shank length | 2 5/8 in (66.67 mm) |
| Gross trailer weight rating | 30,000 lb |
| Finish | Raw steel |
| Part number | 40085 |

## Where the files are

- Lippert (CURT): [CURT 2-5/16" Trailer Ball (1-1/4" x 2-5/8" Shank, 30,000 lbs.) #40085](https://www.lippert.com/curt-23125in-trailer-ball-125in-x-2625in-shank-30000-lbs-raw-steel-40085-2020103193) — web — Publisher's page; dimensions are facts

## Free STEP/STL (2 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/curt-trailer-ball-40085/index.json

- curt-trailer-ball-40085-ball: [STEP](https://xemstudio.com/files/hardware/curt-trailer-ball-40085/curt-trailer-ball-40085-ball.step) · [STL](https://xemstudio.com/files/hardware/curt-trailer-ball-40085/curt-trailer-ball-40085-ball.stl) — Ball Ø58.74 mm
- curt-trailer-ball-40085-shank: [STEP](https://xemstudio.com/files/hardware/curt-trailer-ball-40085/curt-trailer-ball-40085-shank.step) · [STL](https://xemstudio.com/files/hardware/curt-trailer-ball-40085/curt-trailer-ball-40085-shank.stl) — Shank Ø31.75 × 66.67 mm (collar, rise and thread not published, not modelled)

## Questions

**What size is CURT trailer ball 40085?**

2-5/16 in ball (58.74 mm), 1-1/4 in × 2-5/8 in shank (31.75 mm × 66.67 mm), 30,000 lb.

## Fits with

- [CURT 40015 trailer ball (1-7/8 in ball, 3/4 × 2-1/8 in shank, 2,000 lb)](https://xemstudio.com/objects/curt-trailer-ball-40015/)
- [CURT 40161 trailer ball (1-7/8 in ball, 3/4 × 1-5/8 in shank, 2,000 lb)](https://xemstudio.com/objects/curt-trailer-ball-40161/)
- [CURT 40002 trailer ball (1-7/8 in ball, 1 × 2-1/8 in shank, 3,500 lb)](https://xemstudio.com/objects/curt-trailer-ball-40002/)
- [CURT 40072 trailer ball (1-7/8 in ball, 1 × 3 in shank, 3,500 lb)](https://xemstudio.com/objects/curt-trailer-ball-40072/)