Hitches, Receivers & Ball Mounts
Aluminum vs Steel Ball Mount
The weight difference is real and you feel it every time you hitch up. Whether that is worth paying for depends on how often you do.
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How we assessed these: Both materials are compared on each maker's published specifications and on how the parts behave in ordinary use. This site runs no instrumented tests and publishes no measured fatigue or strength data of its own.
Short answer
Choose aluminum if you hitch and unhitch often, lift the mount in and out by hand, or tow near salt water - it is dramatically lighter and does not rust. Choose steel if the mount lives in the receiver, the budget is tight, or the mount will be dragged, levered and generally abused.
This is one of the few hitch questions where the honest answer is about your back rather than about the trailer. A heavy adjustable steel mount is an awkward object: dense, greasy, with nothing comfortable to grip. An aluminum body in the same shape is a different thing to carry. If the mount lives permanently in the receiver tube, that advantage disappears entirely and you have paid for nothing.
What actually differs
| Consideration | Aluminum | Steel |
|---|---|---|
| Weight in hand | Substantially lighter for the same shape | Heavy, and heavier again in adjustable designs |
| Corrosion | Does not rust; the surface oxidizes and stops | Rusts wherever the coating is chipped |
| Cost | Higher for the same drop and rating | The cheapest route to any given rating |
| Abuse tolerance | Dents and gouges more readily | Shrugs off levering, dragging and dropped tailgates |
| Shank wear in the tube | Softer face, so shims matter more | Wears slowly against a steel receiver |
| Where it earns its place | Frequent hitching, salt-water launches, storage in the cab | Mount left in the receiver, tight budget, rough use |
A comparison of the materials as used in ball mounts, not a strength claim. Ratings differ by part, not by material - always read the rating published for the part itself.
Rating is a part question, not a material question
The common misreading is that aluminum must be weaker. It is not that simple: a mount is rated by its design and its published gross trailer weight and tongue weight figures, and aluminum parts are engineered with more section to carry the same load. Two mounts of the same rating are equivalent for towing purposes whatever they are made of, so compare the published numbers rather than reasoning from the material.
What does differ is how the material tolerates things that are not towing. Steel takes a hammer, a pry bar and a decade of being thrown into a truck bed. Aluminum marks. Neither matters structurally in ordinary use, but if your hardware lives a hard life, that is a point for steel.
The corrosion case, which is narrower than it sounds
Aluminum not rusting is the headline, and for boat owners who back a trailer into salt water it is a genuine argument - a steel mount at a coastal launch starts to show rust within a season no matter how well it was painted. Away from salt, the case weakens: a coated steel mount with greased contact faces lasts a long time, and the part that actually seizes is usually the pin and the ball shank, not the body. Keep both greased and the material question gets quieter. Grease choice and where it goes matters more here than the alloy does.
Quick picks
Tap any row to jump to the full write-up. How these are chosen - and what we do and do not claim to know - is published in full on our research methodology page.
| # | Product | Best for | Our read | Price |
|---|---|---|---|---|
| 1 |  Andersen Rapid Hitch Aluminum Adjustable Ball Mount Best aluminum mount | Anyone tired of lifting steel mounts | The weight saving you notice every single hitch-up | Check price on Amazon #ad Affiliate link - we publish no price; Amazon shows the current one |
| 2 |  CURT Adjustable Channel Mount with Dual Ball (2 in shank, 6 in drop) Best steel adjustable | Garages with several trailers | Two ball sizes, 6 in drop, heavy but cheap | Check price on Amazon #ad Affiliate link - we publish no price; Amazon shows the current one |
| 3 |  CURT Loaded Ball Mount with 2 in Ball (2 in drop, 7,500 lb) Best steel fixed | One trailer at a known height | Nothing to adjust, nothing to work loose | Check price on Amazon #ad Affiliate link - we publish no price; Amazon shows the current one |
The mounts in detail
1. Best aluminum mount
Andersen Rapid Hitch Aluminum Adjustable Ball Mount
Andersen Hitches · Best for anyone tired of lifting steel mounts
An aluminum adjustable mount, which is the point: a steel channel mount is genuinely heavy to carry, and this one is not. Balls thread into the stainless pin rather than bolting through a hole, so swapping sizes takes seconds.
We have not sourced a full specification table for this model from the manufacturer’s own site at a stable address. Rather than repeat figures we cannot cite, the assessment above is limited to what the design and the maker’s published description genuinely establish.
What works
- Dramatically lighter than a steel adjustable mount of similar capacity
- Ball changes are a thread-on operation, not a torque-and-nut job
- Aluminum does not rust streak down a painted bumper
What does not
- Aluminum marks more easily than powder-coated steel
- Capacity depends on which ball and pin combination you fit, so read the chart
Skip it if
Not the one if you leave the mount permanently in the receiver through salted winters - the convenience you are paying for is weight, and you would never be lifting it.
#ad Affiliate link - we publish no price; Amazon shows the current one
Raw specifications: Andersen Hitches’s own page. We earn nothing on that link.
2. Best steel adjustable
CURT Adjustable Channel Mount with Dual Ball (2 in shank, 6 in drop)
CURT · Best for garages with several trailers
One mount that covers two ball sizes and a range of heights, which is the answer when the garage contains a boat trailer, a utility trailer and a camper that all sit at different heights. Capacity drops to the lower-rated ball you are actually using.
Published specifications
What works
- Two ball sizes and a height range in a single mount
- Flipping it gives rise as well as drop
- Rated to 14,000 lb on the larger ball
What does not
- Heavy, and more joints means more places for rattle to start
- The pins and bolts need checking for torque, unlike a one-piece mount
Skip it if
Pointless if you own one trailer and tow it with one truck - a fixed mount at the right height is lighter, quieter and cheaper.
#ad Affiliate link - we publish no price; Amazon shows the current one
Raw specifications: CURT’s own page. We earn nothing on that link.
3. Best steel fixed
CURT Loaded Ball Mount with 2 in Ball (2 in drop, 7,500 lb)
CURT · Best for one trailer at a known height
A one-piece mount with the ball already fitted and torqued, rated to 7,500 lb gross and 750 lb tongue with a 2 in drop. Nothing adjusts, which is exactly why nothing rattles or works loose.
Published specifications
What works
- Arrives with the ball fitted, so there is no torque step to get wrong
- One piece means nothing to loosen or rattle
- Light enough to leave in the receiver or throw in a toolbox
What does not
- The 2 in drop is the only drop - measure before you buy
- 7,500 lb ceiling rules out heavier trailers
Skip it if
Useless on a lifted truck, where a 2 in drop will still leave the trailer nose-high and the weight on the rear axle of the trailer.
#ad Affiliate link - we publish no price; Amazon shows the current one
Raw specifications: CURT’s own page. We earn nothing on that link.
Which one to buy
- You hitch and unhitch every weekend. Aluminum. The weight saving is the whole point and you will feel it immediately.
- The mount never leaves the receiver. Steel. You are carrying it once, so pay less.
- You launch a boat in salt water. Aluminum body, and still rinse and grease everything.
- You need two ball sizes and a deep drop for not much money. Steel adjustable, and accept the weight.
- You want the simplest possible setup. A fixed steel loaded mount in the right drop. Fixed against adjustable is the other half of this decision.
One thing neither material fixes: the wrong drop. Towing nose-high or nose-down moves weight off the trailer axle and is a leading cause of instability, so settle what drop you actually need with a tape measure before you choose what the mount is made of.
Key takeaways
- Rating comes from the part, not the material - read the published figure.
- Aluminum's advantage is weight in your hands, so it pays off only if you lift it.
- Steel tolerates abuse that would mark aluminum.
- Salt water is the strongest case for aluminum.
- Either way, shim the shank and grease the ball.
How we sourced this
Every figure on this page came from one of the following, each fetched while the page was written. Where a manufacturer or regulator does not publish a number, we say so rather than estimate it.
Common questions
- Are aluminum ball mounts strong enough?
- Yes, within their published rating, which is what you buy to. Aluminum designs use more material to reach the same gross trailer weight and tongue weight figures, so compare the published ratings rather than assuming the metal decides.
- How much lighter is an aluminum ball mount?
- Enough that it changes the job of hitching up, which is why the category exists. Exact figures differ by part and drop, so compare the shipping weights on the two listings you are actually choosing between.
- Will an aluminum mount corrode in a steel receiver?
- Dissimilar metals in contact can corrode at the interface, particularly with salt around. Grease the shank, use a shim or anti-rattle pin to stop movement, and pull the mount out to rinse it after a salt-water launch.
- Is a steel ball mount better for heavy towing?
- Not inherently. Heavy towing wants a mount whose published gross trailer weight and tongue weight ratings exceed your load, with the shortest drop that levels the trailer. Both materials are made in heavy ratings.
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Found something out of date, or a figure you can source better than we did? Corrections get read first. How we research explains how these pages are put together, and contact is one click away.