What They Have in Common
These are the same cart in a lot of ways. Both list at $299.95, both fold in two steps, both use Top-Lok bag attachment, both include a detachable umbrella holder, a drink-and-phone holder, and a storage console. Both have a handle-mounted parking brake and a 2-year limited warranty. Bag Boy publishes no open dimensions for either one.
Where They Differ
The fold
This is the whole comparison. The Slimfold folds to 32.25 × 8.5 × 13.5 inches — 2.1 cubic feet. The Quad Pro folds to 24 × 17 × 15 inches — 3.5 cubic feet. The Slimfold is smaller by 1.4 cubic feet, and the depth is the headline number: 8.5 inches, against 15 on the Quad Pro's thinnest side.
The catch is that 32.25-inch length. Depending on how your trunk is shaped, a cart that's flat but long can be harder to load than one that's bulkier but shorter. The Quad Pro's longest dimension is 24 inches. Both folds are two steps. The Slimfold adds an auto-open feature, which Bag Boy describes as easy auto-open, but that's their phrase and I can't tell you more than that.
Wheels
The Quad Pro has four wheels. The Slimfold has three. That's the trade-off between these two carts in its simplest form: a fourth wheel or a flatter fold.
Weight
The Slimfold is lighter by 1 pound — 15 lbs versus 16 lbs. On a 6,500-yard walk that's not nothing, but it's also not why you'd choose one over the other.
What's in the box
Both carts include a detachable umbrella holder, a drink-and-phone holder, a scorecard console, and a large accessory bag. The Quad Pro's scorecard console is described as deep; the Slimfold's isn't. The Quad Pro also features a magnetic accessory plate, which the Slimfold doesn't list. Both use Top-Lok bag attachment — that system is designed for compatible Bag Boy bags.
Who Should Buy Which
Get the Bag Boy Quad Pro if:
- Your trunk fits a cart that's 24 inches on its longest side
- You want four wheels
- You want the deep scorecard console
- You want the magnetic accessory plate
Get the Bag Boy Slimfold if:
- Your trunk is shallow and 8.5 inches of depth genuinely makes the difference between fitting and not fitting
- You've measured and the 32.25-inch length works in your specific car
- One pound matters — you're also carrying your bag to and from the lot on foot
The Bottom Line
At identical list prices, the Quad Pro is the default. A fourth wheel and a shorter folded length, for one extra pound, make it the one I'd buy. The Slimfold is a real answer to a real problem — an 8.5-inch folded depth is genuinely useful if that's the constraint — but a 32.25-inch-long cart isn't for every trunk either. Know your trunk before you buy the Slimfold.
Get the Bag Boy Quad Pro.