What Size Box Blade Do I Need? A Box Blade Size Chart by Tractor Horsepower

"What size box blade for a 30 hp tractor?" is a question that shows up constantly in our own search data, and it usually expects a single number. The trouble is that at least one major manufacturer does not size blades that way. Here is how one of the major implement makers actually rates them, and the two measurements that turn that rating into a width.

Box Blade Size Chart by Horsepower

This chart is built directly from Land Pride's published horsepower ratings for its box scraper series, checked in late September 2026. Land Pride is one manufacturer - other brands rate their own blades - but it shows the pattern clearly.

Look at the BB12 row: a 48-inch and a 72-inch blade carry the same 17-30 HP rating. That is the whole point. Land Pride describes the BB12 as designed for Category 1 tractors "in the 30 hp range," and it offers five widths within it. The horsepower rating tells you the series - how heavy the blade is built - and your tractor's dimensions tell you the width.

Step 1: Measure Your Rear Tires

Measure across the outside edges of your rear tires. If the box blade is narrower than that number, your tires run outside the cut on every pass and pack down the ground the blade just leveled - you end up grading around your own tire tracks. A blade at least as wide as the tires, or a little wider, covers them.

Going much wider than your tires has a cost: a wider blade carries more material in front of it and more weight on the three-point hitch. That is where the horsepower rating comes back in.

Step 2: Check Your Hitch Category

Three-point hitches come in categories, and the blade has to match. Do not guess from the tractor's size: Land Pride matches its Category 1 BB12 series to Kubota's BX sub-compacts, while the ONECHOI blade below is sold for Category 0 garden tractors. Your tractor's operator's manual lists which one you have. Several of the Amazon blades below are built to fit both Cat 0 and Cat 1, per their listings, which helps if you are not sure or plan to trade up.

Step 3: Check Your Lift Capacity

Your tractor's manual also lists the three-point hitch's lift capacity. The blade has to be comfortably under it - and box blades vary more in weight than in width. Two blades on this page make the point: the Impact Implements 38-inch blade's listing gives its weight as 113 pounds, while the Ag-Rite 60-inch listing describes a 320-pound frame. Check the net implement weight - not the shipping weight - before you buy.

Weight also changes how the blade works. Impact Implements puts it plainly in its own listing: its blade's weight provides the downward force that keeps the edge and tines engaged with the ground.

What Size Box Blade for a 25 HP Tractor?

By Land Pride's ratings, a 25 HP tractor sits inside three series: BB12, BB15, and the bottom of BB25. That spans 48 to 84 inches. In practice, measure the rear tires and pick the first width at or above that number, then check the blade's weight against your lift capacity. If your tractor is a Cat 0 sub-compact, choose a blade listed for Cat 0.

What Size Box Blade for a 30 HP Tractor?

Same three Land Pride series - 30 HP is the top of BB12's range and inside BB15 and BB25. You have room to go heavier than a 25 HP owner, which is useful on hard gravel. Measure your tire width for the minimum, and consider a heavier-built blade in that width rather than a much wider light one.

What Size Box Blade for a 40 HP Tractor?

At 40 HP you are at the top of BB15 and in the middle of BB25, so Land Pride's options run 60 to 84 inches. Your rear tire width sets the minimum, and at this size you have the most room to choose a heavier-built blade.

Amazon Box Blades by Size

Every blade below was checked on Amazon in late September 2026, and the specs are from each listing. Box blades are heavy freight - confirm the seller, the shipping terms, and whether pins are included before you order.

The Ag-Rite is the only blade here whose listing states a horsepower range (16-35 HP), and only the Ag-Rite and Impact listings state the implement's weight in the product description. For the others, confirm the net weight with the seller before checking it against your lift capacity.

For a deeper look at what separates a good box blade from a bad one - shanks, cutting edges, and steel - see our best box blade guide. If your job is pushing snow or cutting ditches, a rear blade is the better implement; for spreading and smoothing, a landscape rake, and for clearing overgrowth before you grade, see brush cutters.

Common Questions

What size box blade for a 25 hp tractor?

Land Pride rates three of its box scraper series for 25 HP tractors, covering widths from 48 to 84 inches. Measure across the outside of your rear tires and choose a blade at least that wide, then confirm its weight is within your three-point lift capacity and that it matches your hitch category.

What size box blade for a 30 hp tractor?

30 HP falls inside Land Pride's BB12 (17-30 HP), BB15 (17-40 HP), and BB25 (25-55 HP) series, so widths from 48 to 84 inches are rated for it. Use your rear tire width as the minimum and your lift capacity as the ceiling on weight.

Should a box blade be wider than the tractor?

It should be at least as wide as the outside of your rear tires. Narrower, and the tires run outside the cut and pack down ground you just graded.

What is the difference between Cat 0 and Cat 1 box blades?

They fit different three-point hitch sizes, and the blade must match your tractor's. Do not assume from tractor size - Land Pride matches Category 1 blades to Kubota's BX sub-compacts. Your operator's manual lists yours, and some blades are built to fit both.

Does a heavier box blade work better?

Weight is what keeps the edge and shanks engaged with the ground - Impact Implements makes that point in its own listing. The limit is your tractor's three-point lift capacity, so check it before you buy the heaviest blade in your width.