# CURT 40018 trailer ball (2 in ball, 3/4 × 2-1/8 in shank, 3,500 lb)

> What are the dimensions of the CURT 40018 trailer ball?

- Category: Tools & garage › Trailer balls
- Kind: Modern device
- Basis: Manufacturer specifications (Lippert (CURT))
- Page: https://xemstudio.com/objects/curt-trailer-ball-40018/ · JSON: https://xemstudio.com/api/geometry?object=curt-trailer-ball-40018 · Plain text: https://xemstudio.com/objects/curt-trailer-ball-40018/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 |
|---|---|
| 50.8 | 50.8 |

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

## Notes

- CURT part 40018 is a 2 in trailer ball on a 3/4 in diameter × 2-1/8 in long shank, rated 3,500 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 in (50.8 mm) |
| Shank diameter | 3/4 in (19.05 mm) |
| Shank length | 2 1/8 in (53.97 mm) |
| Gross trailer weight rating | 3,500 lb |
| Finish | Chrome |
| Part number | 40018 |

## Where the files are

- Lippert (CURT): [CURT 2" Trailer Ball (3/4" x 2-1/8" Shank, 3,500 lbs.) #40018](https://www.lippert.com/curt-2in-trailer-ball-75in-x-2125in-shank-3500-lbs-chrome-40018-2020103151) — 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-40018/index.json

- curt-trailer-ball-40018-ball: [STEP](https://xemstudio.com/files/hardware/curt-trailer-ball-40018/curt-trailer-ball-40018-ball.step) · [STL](https://xemstudio.com/files/hardware/curt-trailer-ball-40018/curt-trailer-ball-40018-ball.stl) — Ball Ø50.8 mm
- curt-trailer-ball-40018-shank: [STEP](https://xemstudio.com/files/hardware/curt-trailer-ball-40018/curt-trailer-ball-40018-shank.step) · [STL](https://xemstudio.com/files/hardware/curt-trailer-ball-40018/curt-trailer-ball-40018-shank.stl) — Shank Ø19.05 × 53.97 mm (collar, rise and thread not published, not modelled)

## Questions

**What size is CURT trailer ball 40018?**

2 in ball (50.8 mm), 3/4 in × 2-1/8 in shank (19.05 mm × 53.97 mm), 3,500 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/)