---
title: "Hitches and hitch classes"
canonical: https://towingdad.shop/equipment/hitches/
lang: en
---

# Hitches and hitch classes
A hitch is not one part but three: the receiver welded to the vehicle, the ball mount that slides into it, and the ball bolted on top. Each carries its own stamped rating, and the combination is always limited by the lowest of the three.

## The classes, and what they actually mean
Classes I through V describe the receiver: its opening size and its rated capacity. A higher class accepts more weight and a larger opening, but the class alone authorises nothing — it is still bounded by the vehicle's GCWR and its payload. A class-V receiver on a mid-size truck does not turn that truck into something that can pull a class-V load.

## The weakest link
A class-III receiver fitted with a lower-rated ball mount is limited by the ball mount. Check every component's stamp, not just the vehicle's specification. And remember tongue weight lands on payload: you can be comfortably under the tow rating and over payload at the same time.

## Weight distribution and sway control
A weight-distributing hitch uses spring bars to move part of the tongue weight onto the front and trailer axles, restoring steering feel and levelling the rig. It does not increase capacity — it redistributes what is already there. Sway control is a separate mechanism and often a separate part; if a trailer sways, the first thing to check is load distribution, not the hitch.

## Related questions
- [Towing capacity, explained](/guides/towing-capacity-explained/)
- [Tongue weight calculator](/calculators/tongue-weight/)
- [Towing an RV or trailer](/guides/towing-an-rv-or-trailer/)

Always follow your vehicle’s owner’s manual. Improper towing can cause severe drivetrain damage that is not covered by warranty.

Sources (2)- Electronic Code of Federal Regulations — [49 CFR § 571.3 — Definitions (GVWR, GCWR)](https://www.ecfr.gov/current/title-49/section-571.3) (accessed 2026-08-17) T1
- SAE International — [J2807 — Performance Requirements for Determining Tow-Vehicle Gross Combination Weight Rating](https://www.sae.org/standards/content/j2807_202002/) (accessed 2026-08-17) T2