66" vs 72" vs 84" Skid Steer Bucket: Which Size Is Right?
Bucket width is the #1 sizing question for new buyers — and getting it wrong means either leaving material on the edges or being too wide for your job site. Here's how to match width to your machine, job, and site.
Based on published manufacturer specifications and Canadian dealer availability. Written to help Canadian buyers compare equipment options. Not a dealer — verify specs before purchasing. Last reviewed: 2026-03-17 by Skid Steer Attachments Canada.
Most first-time buyers just order the same size bucket their dealer had in stock. Sometimes that's right. Often it isn't. The wrong bucket width leaves material piling up on the sides of your machine, or worse — gets you stuck at a gate that's 8 inches narrower than your bucket.
Bucket sizing has a real formula behind it. Here's how to apply it.
The 110–120% Rule
Bucket width should be 110–120% of your machine's track width (measured outside tread to outside tread). This gives you enough overlap to clean up alongside the machine on each pass without being so wide that material piles up beyond your tracks.
- Too narrow: you leave a ridge of material on each side, requiring extra passes
- Too wide: material piles up past the bucket edges, tipping cycle is harder, and site access becomes an issue
- Just right: bucket cleans up roughly 2–4" per side beyond each tire/track — clean pass, minimal rework
Mid-frame skid steers (Bobcat S510–S570, JD 318G–332G, Case SR210–SR270) typically have a track/tire width of 67–72". Applying the 110–120% rule gives an ideal bucket width of 74–86" — which puts the 72" bucket at the low end and the 84" bucket right in the sweet spot for open sites.
The Three Sizes at a Glance
66"
Best for compact machines and tight residential sites.
- Compact SSL (Bobcat S450, JD 318G)
- Track width 60–66"
- Residential lots, narrow access
- Fits most residential gates
- CAD: $900–$1,600
72" MOST STOCKED
The universal size. Most available, fastest delivery.
- Mid-frame SSL (Bobcat S550, Case SR240)
- Track width 67–72"
- Versatile — residential to commercial
- Most aftermarket cutting edges available
- CAD: $1,000–$1,900
84"
Best for open sites, production grading, large material moves.
- Mid-to-large frame SSL (Bobcat S570+)
- Track width 70–76"
- Commercial grading, large material moves
- May not clear residential gates (48–60")
- CAD: $1,200–$2,500
Machine Matching by Model
| Machine Model | Track/Tire Width (outside) | Ideal Bucket Width | Notes |
|---|---|---|---|
| Bobcat S450, S510 | ~62–66" | 66–72" | 66" for tight sites; 72" if you want max coverage |
| Bobcat S530, S550 | ~67–68" | 72" | 72" is the natural match; 84" possible on open sites |
| Bobcat S570, S590 | ~68–72" | 72–84" | 84" suits open commercial work; 72" for residential |
| JD 318G | ~64" | 66–72" | Similar to Bobcat S450 class |
| JD 326G, 328G | ~68" | 72–78" | 72" is the standard; 84" for production grading |
| JD 332G | ~72" | 78–84" | 84" is the right size for this machine class |
| Case SR210, SR240 | ~67–69" | 72" | 72" standard; confirm site access before going 84" |
| Case SR270, SV340 | ~72–76" | 80–84" | 84" appropriate for these heavier machines |
| Kubota SSV75, SVL75 | ~65–72" | 72–78" | 72" is conservative and widely available |
Why the 66" Bucket Underperforms on Mid-Frame Machines
A 66" bucket on a machine with a 68–72" track width is narrower than the machine itself. Every pass leaves a ridge of material on the outside edges of your tracks. You're doing extra passes where the machine already has to maneuver. On grading work especially, this is frustrating — you spend more time cleaning up edges than you should.
The 66" is genuinely the right choice for compact machines (where track width is 60–66") and for tight residential sites where gate clearance matters (residential gates are typically 48–60" wide — any bucket size will need to angle for these). But on a mid-frame machine, the 66" leaves performance on the table.
The 72" — Why It's the Safe Default
The 72" bucket is the most stocked size at Canadian dealers by a significant margin. This means:
- Shortest lead time — often in stock for immediate pickup or fast delivery
- Most competitive pricing — volume production keeps costs down
- Widest aftermarket support — cutting edges, tooth bars, wear plates readily available
- Resale value — easiest to sell used because it fits the most machines
For a mid-frame machine doing mixed residential and light commercial work, the 72" is usually the right answer. It doesn't underperform on the machine, it clears most access points, and it's the easiest to source and maintain.
When to Go 84"
The 84" bucket pays off when your work is predominantly open-site production: large grading jobs, commercial site prep, material moving on rural properties. Each pass covers more ground. Fewer passes means faster job completion. At 450–700 lbs (depending on brand and steel gauge), the 84" is also the heaviest option — verify against your machine's rated operating capacity before ordering.
The gate problem: Most residential properties have gates in the 48–60" range. An 84" bucket does not fit through a 60" gate. If you're doing residential work, this is a practical constraint that often eliminates the 84" regardless of machine size. Measure the narrowest access on your typical jobs before ordering.
Quick check: If your narrowest job site access (gate, fence gap, alley) is under 84", you need a narrower bucket — or you'll be detaching and re-attaching on every job. Most contractors keep a 72" as their general-purpose bucket and rent or own an 84" specifically for open-site production work.
Cutting Edge vs Teeth: Which Do You Need?
This is the second most common bucket question. The choice comes down to what you're cutting into:
| Flat Cutting Edge | Teeth / Tooth Bar | |
|---|---|---|
| Best for | Grading, spreading, surface work, soft to medium soil | Hard ground, clay, rocky soil, breaking frost |
| Surface finish | Clean, smooth — good for finish grading | Rough, ripped — not for final grade |
| Material penetration | Moderate — slides under soil | High — teeth bite and break |
| Typical use | Topsoil, gravel, mulch, sand, backfill | Breaking hardpan, digging in clay, frozen ground |
| Reversible? | Yes — most cutting edges are reversible (flip for fresh edge) | Teeth are bolt-on; tooth bar mounts over cutting edge |
Recommendation: Buy the bucket with a flat cutting edge first. A bolt-on tooth bar can be added for $150–$350 CAD when hard ground work demands it. The cutting edge handles the majority of landscaping and construction tasks — and gives you a clean surface finish that teeth never will.
Weight and ROC Considerations
Attachment weight directly affects your machine's rated operating capacity (ROC) and tipping load. Exceeding ROC is unsafe and can damage your machine. Approximate bucket weights:
- 66" GP bucket: 280–380 lbs (varies by brand and steel gauge)
- 72" GP bucket: 320–450 lbs
- 84" GP bucket: 450–700 lbs (heavy-duty models top end)
On a compact SSL with 1,000 lb ROC, a 500 lb bucket leaves you 500 lbs of rated payload. Check your machine specs. Heavy-duty buckets (thicker steel, full-bar reinforcing) are heavier but last longer — the right choice for production work, potentially overkill for light residential use.
Available Brands in Canada
All three sizes (66", 72", 84") are available from the following brands through Canadian dealers:
- HLA Attachments — Canadian-made, Ontario; wide dealer network; quality mid-tier
- Blue Diamond Attachments — Canadian brand; competitive pricing; solid warranty support
- Bobcat OEM — premium pricing; guaranteed fit on Bobcat machines; good resale
- Werk-Brau — commercial-grade; heavier steel; popular with rental fleets
- Berlon Industries — performance focused; strong in agriculture and construction
- IronBull / TMG Industrial — budget tier; widely available online; adequate for light-to-medium use
Canadian context: The 72" bucket is by far the most consistently stocked size at Canadian dealers. If your machine fits a 72", you'll typically get the shortest delivery lead time and the most competitive price. The 84" often requires ordering, and 66" stock is spotty outside major dealers.
Verdict by Job Type and Machine
| Job Type / Situation | Recommended Size | Why |
|---|---|---|
| Compact machine (Bobcat S450, JD 318G) | 66" | Matches track width; oversized bucket is counterproductive |
| Mid-frame machine, residential work | 72" | Gate-friendly, widely available, correct coverage for machine |
| Mid-frame machine, open commercial sites | 72–84" | 84" if no gate constraints; more material per cycle |
| Gravel driveways and residential properties | 72" | Gate access; sufficient coverage; most versatile |
| Large-frame machine (Bobcat S770, Case SV340) | 84" | Machine ROC supports heavier bucket; track width demands it |
| Production grading, farm or commercial | 84" | Maximum material per cycle; faster site completion |
| Tight urban or residential lots | 66–72" | Maneuverability over capacity |
| Unsure — want maximum flexibility | 72" | Best availability, most versatile, easiest to resell |
The Short Answer
If you're on a mid-frame skid steer and aren't sure, order the 72". It's the most available size in Canada, fits the widest range of machines, and handles the majority of jobs without the access constraints of the 84". Add a tooth bar if your ground is hard. Buy the 84" when your work is primarily open-site and production speed matters more than gate clearance.
- 66" → compact machine or tight residential only
- 72" → mid-frame, mixed work, best availability, safe default
- 84" → mid-to-large frame, open sites, production grading, no gate constraints
Frequently Asked Questions
What is the 110–120% rule for selecting the right skid steer bucket width?
Bucket width should be 110–120% of your machine's track width (measured outside tread to outside tread). This gives enough overlap to clean up material on each side of the machine without being so wide that material piles up beyond the tracks. A machine with a 66-inch track width ideally runs a 72–78 inch bucket.
Why does a 66-inch bucket underperform on mid-frame skid steers?
A 66-inch bucket on a machine with 68–72 inch track width is narrower than the machine itself. Every pass leaves a ridge of material on the outside edges of the tracks, requiring extra cleanup passes. On grading work especially, this creates inefficiency. The 66-inch bucket is the right choice for compact machines with 60–66 inch track width and for tight residential sites with gate clearance constraints.
When should you choose an 84-inch bucket over a 72-inch bucket?
The 84-inch bucket pays off when work is predominantly open-site production: large grading jobs, commercial site prep, and material moving on rural properties. Each pass covers more ground and fewer passes means faster job completion. The key constraint is gate access — at 84 inches, the bucket does not fit through typical residential gates (48–60 inches) and is impractical for residential work.
What is the approximate weight of a 72-inch vs 84-inch GP bucket?
A 72-inch GP bucket typically weighs 300–450 lbs depending on steel gauge and brand. An 84-inch bucket weighs approximately 450–700 lbs. The additional weight of the 84-inch directly reduces usable payload capacity against the machine's rated operating capacity, so verifying the bucket weight against your machine's ROC before ordering is important.
Is a flat cutting edge or weld-on teeth better for general landscaping and construction use?
A flat bolt-on cutting edge is the recommended starting configuration for most landscaping and construction work — it handles topsoil, gravel, clay, and soft aggregate cleanly and produces a smooth finish. A bolt-on tooth bar can be added for $150–$350 CAD when hard ground demands it. Buying a bucket with teeth installed and removing them for finish work is unnecessary complexity; start with the cutting edge and add teeth when needed.
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