CURT 40089 trailer ball (3 in ball, 2 × 3-1/4 in shank, 30,000 lb) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/curt-trailer-ball-40089/  (sheet CC BY 4.0)
Basis: Manufacturer specifications (Lippert (CURT))
Catalog version: 2026-10-20

Overall (mm): length 76.2, width 76.2
- CURT part 40089 is a 3 in trailer ball on a 2 in diameter × 3-1/4 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.

dimension  value
Ball diameter  3 in (76.2 mm)
Shank diameter  2 in (50.8 mm)
Shank length  3 1/4 in (82.55 mm)
Gross trailer weight rating  30,000 lb
Finish  Raw steel
Part number  40089

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Lippert (CURT): CURT 3" Trailer Ball (2" x 3-1/4" Shank, 30,000 lbs.) #40089 — web — Publisher's page; dimensions are facts — https://www.lippert.com/curt-3in-trailer-ball-2in-x-325in-shank-30000-lbs-raw-steel-40089-2020103197

Free files (CC BY 4.0, Xem Studio; STEP + STL, 2 parts): https://xemstudio.com/files/hardware/curt-trailer-ball-40089/index.json
API: https://xemstudio.com/api/geometry?object=curt-trailer-ball-40089