CURT multi-ball mounts put several welded trailer-ball sizes on one receiver shank. The ball diameters may look the same between models, but each ball has its own gross trailer weight and tongue-weight limits. The receiver size, hollow or solid shank, and optional tow hook also differ.
CURT ball mounts by receiver and individual towing rating
| MPN | Receiver / shank | Ball sizes | GTW by ball size | TW by ball size |
|---|---|---|---|---|
| 45651 | 2½-in hollow shank | 1⅞ / 2 / 2⁵⁄₁₆ in | 5,000 / 10,000 / 14,000 lb GTW | 500 / 1,000 / 1,400 lb TW |
| 45652 | 2-in hollow shank | 1⅞ / 2 / 2⁵⁄₁₆ in | 5,000 / 7,500 / 10,000 lb GTW | 500 / 750 / 1,000 lb TW |
| 45675 | 2-in solid shank | 1⅞ / 2 / 2⁵⁄₁₆ in | 3,500 / 5,000 / 10,000 lb GTW | 350 / 500 / 1,000 lb TW |
Ratings are ordered by ball size (1⅞-inch, 2-inch, 2⁵⁄₁₆-inch), not interchangeable across other ball mounts. GTW means gross trailer weight; TW means tongue weight.
The lowest-rated component controls. Check the tow vehicle, receiver, ball mount, selected ball and trailer coupler. An integrated tow hook has its own appropriate use and does not inherit an unrestricted towing or recovery rating.
Five checks before selecting a multi-ball mount
- Measure the receiver opening: 45651 has a 2½-inch shank; 45652 and 45675 have 2-inch shanks.
- Check the trailer coupler marking and choose the matching 1⅞-, 2- or 2⁵⁄₁₆-inch ball.
- Apply the selected ball's specific GTW and tongue weight, rather than the highest rating printed on the mount.
- Check hollow versus solid shank, included tow hook, hitch-pin reach and clearance at each pin position.
- Use a suitable retained hitch pin and follow the manufacturer instructions before towing; do not use an undersized pin or exceeding any towing system limit.
Compare exact CURT ball mounts
Each card links directly to the corresponding NewRVParts product and its availability.
CURT 45651 — 2½-in hollow shankHeavy-duty triple-ball mount for a compatible 2½-inch receiver. The welded balls have separate ratings, so choose by both coupler size and permissible load.View product and availability
CURT 45652 — 2-in hollow shankA triple-ball mount for a standard 2-inch receiver with a hollow shank. Its 2-inch ball is rated lower than the same-size ball on 45651.View product and availability
CURT 45675 — 2-in solid shankSolid 2-inch shank with three chrome-finished hitch balls and an integrated tow hook. The tow hook does not inherit an independent trailer-ball rating.View product and availability
Need the right receiver hitch pin? Compare CURT hitch pin diameters and locks.
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