CURT 40030 trailer ball (2-5/16 in ball, 1-1/4 × 2-5/8 in shank, 15,000 lb) — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/curt-trailer-ball-40030/  (sheet CC BY 4.0)
Basis: Manufacturer specifications (Lippert (CURT))
Catalog version: 2026-10-20

Overall (mm): length 58.74, width 58.74
- CURT part 40030 is a 2-5/16 in trailer ball on a 1-1/4 in diameter × 2-5/8 in long shank, rated 15,000 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  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  15,000 lb
Finish  Chrome
Part number  40030

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Lippert (CURT): CURT 2-5/16" Trailer Ball (1-1/4" x 2-5/8" Shank, 15,000 lbs.) #40030 — web — Publisher's page; dimensions are facts — https://www.lippert.com/curt-23125in-trailer-ball-125in-x-2625in-shank-15000-lbs-chrome-40030-2020103156

Free files (CC BY 4.0, Xem Studio; STEP + STL, 2 parts): https://xemstudio.com/files/hardware/curt-trailer-ball-40030/index.json
API: https://xemstudio.com/api/geometry?object=curt-trailer-ball-40030