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CAT 303.5 Rubber Track 300x52.5Wx84 ( 12" ) Directional Block Pattern CAT 303.5 Rubber Track 300x52.5Wx84 ( 12" ) Directional Block Pattern Price range: $945.00 through $1,235.00
CAT MM35B Rubber Track 300x52.5Wx84 ( 12" ) Directional Block Pattern CAT MM35B Rubber Track 300x52.5Wx84 ( 12" ) Directional Block Pattern Price range: $945.00 through $1,235.00
Rubber Tracks Warehouse

CAT MM40SR Rubber Track — 300x52.5Wx84 Directional Block Pattern, 12-Inch Width

The Track That Keeps Your CAT MM40SR Earning

Extend your machine’s service life and improve traction with these Rubber Tracks Warehouse Attachment. Reduced ground pressure protects finished surfaces.

Exact OEM spec fit — Engineered 300x52.5Wx84 to match your CAT MM40SR undercarriage precisely.
Self-cleaning block tread — Directional lugs eject mud and debris automatically, every pass.
Hard-surface grip — Stays planted on asphalt, concrete, and gravel jobsites all day.
Ships from US warehouse — Real tracking number, real ETA — not a slow boat from overseas.
Backed with warranty — Rubber Tracks Warehouse stands behind every track they ship.
  • FREE Freight -- Ships from US warehouse, tracking emailed the day it leaves.
  • FREE Fit-Check Call -- Talk to a real operator before you order — confirm spec.
  • Price Match Guarantee -- Send any authorized US dealer quote — we beat it.

Price range: $945.00 through $1,235.00

Add to Cart
CAT MM40SR Rubber Track 300x52.5Wx84 ( 12" ) Directional Block Pattern
CAT MM40SR Rubber Track 300x52.5Wx84 ( 12" ) Directional Block Pattern
$945.00 – $1,235.00Price range: $945.00 through $1,235.00

60-day money back · No restocking fee

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Ships in 3–5 Days Heavy-duty crating included.
4.9/5 Stars 2,400+ verified reviews.

In the box

  • 1× CAT MM40SR Rubber Track (300x52.5Wx84, 12" width)
  • Directional block pattern tread — commercial duty
  • Ships assembled, ready to mount
CAT MM40SR Rubber Track 300x52.5Wx84 ( 12" ) Directional Block Pattern
CAT MM40SR Rubber Track — 300x52.5Wx84 Directional Block Pattern, 12-Inch Width
$945.00 – $1,235.00Price range: $945.00 through $1,235.00

The Track That Keeps Your CAT MM40SR Earning

Most operators don't think about tracks until the machine is sitting in the yard on steel. By then the clock is already running against a job deadline. The CAT MM40SR Rubber Track 300x52.5Wx84 ships from a US warehouse, fits your machine on spec, and puts the rig back to work without a parts-chasing nightmare. Directional block pattern, 84 links, 12-inch width — built to the exact OEM measurement your CAT MM40SR undercarriage was engineered around. Need it shipped yesterday? Call before you order and we confirm what's on the shelf. Order the wrong size and you eat freight both ways on a 90-lb track. Order here, and we verify the fit before it ships.

FREE SHIPPING60-DAY RETURNSEXPERT SUPPORTSHIPS FROM USAFREE SHIPPING60-DAY RETURNSEXPERT SUPPORTSHIPS FROM USAFREE SHIPPING60-DAY RETURNSEXPERT SUPPORTSHIPS FROM USAFREE SHIPPING60-DAY RETURNSEXPERT SUPPORTSHIPS FROM USAFREE SHIPPING60-DAY RETURNSEXPERT SUPPORTSHIPS FROM USAFREE SHIPPING60-DAY RETURNSEXPERT SUPPORTSHIPS FROM USA
Ships from US warehouse
Guaranteed fit or refund
Self-cleaning block tread
Free freight qualifying orders
300mm
Verified track width
84
Precision link count
12"
Overall tread width
Hard-Surface Traction That Doesn't Chunk Out by Lunch

Hard-Surface Traction That Doesn't Chunk Out by Lunch

Import tracks rated for light-duty pass every product photo test. Then you put them on a compact excavator working asphalt and concrete all day, and the lugs chunk out before the afternoon is done — and the seller's listing is gone by the time you go looking for the warranty. The directional block pattern on this CAT MM40SR track is engineered specifically for hard and abrasive surfaces, with self-cleaning lugs that eject debris between passes so you're not dragging mud into your undercarriage. Craftsmanship that outlasts the machine, not just the return window.

300mm Wide. 52.5mm Pitch. 84 Links. No Surprises.

300mm Wide. 52.5mm Pitch. 84 Links. No Surprises.

Three numbers are the only fitment language that matters for rubber tracks: width, pitch, and link count. All three are confirmed against your CAT MM40SR undercarriage before this track ships. No 'compatible with most compact excavators' hedging — the MM40SR was built to specific tolerances, and a track that runs even half a pitch off will walk off the rollers under load. We verify the spec. The track bolts to your rig. You get back to the jobsite without a second phone call.

In Stock in the US — Not Stuck in a Container

In Stock in the US — Not Stuck in a Container

Your CAT MM40SR sitting idle costs you money every day. This track ships from US-based warehouses, assembled and ready to mount. Tracking number emailed the day it leaves the dock. Rubber Tracks Warehouse carries inventory in-country — not a six-week slow boat that clears customs after your deadline has passed. Machine is down right now? Call before you order. We confirm what's on the shelf and what freight option gets it to your yard fastest. That's what operator-first support looks like.

Will it fit your CAT MM40SR?

This track is sized to the exact OEM spec for the CAT MM40SR compact excavator. Verify all three numbers before ordering.

  • CAT MM40SR mini excavator — direct OEM spec match
  • Confirm track width 300mm and pitch 52.5mm against your undercarriage before ordering
  • Not sure? Call for a free fit-check — we verify your machine spec before anything ships

Built for the Jobsite, Not the Showroom

Directional block pattern tracks handle the surface conditions operators deal with on real commercial jobs.

Asphalt & concrete work
Gravel and riprap sites
Landscaping and clearing
Utility trenching
Demo and light excavation

Full specifications

At a glance

Dimensions
300mm (12")
Surface
Hard and abrasive surfaces
Warranty
1 year parts and labor
Full specifications15 data points across 4 categories

Dimensions

Track Width300mm (12")
Pitch52.5mm
Links84
Part Reference300x52.5Wx84

Power & Performance

Tread PatternDirectional Block
Surface ApplicationHard and abrasive surfaces
Self-CleaningYes — directional lug geometry
Ground DisturbanceMinimal

Materials

ConstructionHeavy-duty rubber compound
ReinforcementSteel cord embedded
BrandRubber Tracks Warehouse (Grizzly™)

Compliance & Warranty

Warranty1 year parts and labor
US SupportYes — US-based dealer
Ships FromUS warehouse
Compatible MachineCAT MM40SR

Our Promise

We don't ship a track until we know it fits your machine. And if it doesn't, you don't pay freight.

1-Year Parts WarrantyRubber Tracks Warehouse backs every track with a real warranty and a real US phone number — not a disconnected line.
Ships from US — FastIn-stock tracks leave from a US warehouse. Tracking emailed same day. No six-week overseas wait.
Guaranteed Fit or Money BackDoesn't fit your MM40SR? Send it back — we pay return freight both ways. No restocking fee. No runaround.
★★★★★
“Had my MM40SR sitting with a blown track for three days while the dealer chased parts. Called Iron Attachments, confirmed the spec in five minutes, had the track on a truck the next morning. Bolted on clean, no issues. Machine's been running eight-hour days ever since.”
T
Travis M.Knoxville, TN

The CAT MM40SR Rubber Track 300×52.5Wx84 ( 12″ ) is designed with a Directional Block Pattern to provide maximum support and traction.

Directional block pattern rubber tracks are engineered for optimal performance on hard and abrasive surfaces. Their unique design offers a balance of traction and comfort, with self-cleaning capabilities that ensure consistent operation. Ideal for track loaders and mini excavators, these tracks minimize ground disturbance and maximize durability for a variety of applications.

Grizzly™ offers this track in two series. Explore the difference in our series below!

Note: If your machine is down… Chat with a Grizzly™ expert or call 866.391.6175 for next-day delivery or same-day pick-up options.

 

CAT MM40SR Rubber Track 300x52.5Wx84 ( 12" ) Directional Block Pattern

Heavy-Duty Construction

The CAT MM40SR Rubber Track 300×52.5Wx84 ( 12" ) Directional Block Pattern is engineered for operators who demand reliability. Built with heavy-duty materials designed for commercial use and demanding jobsite conditions.Designed to handle tough jobsite conditions day after day.

Quick-Attach Compatible

Universal quick-attach mounting system compatible with most major skid steer brands including Bobcat, CAT, John Deere, Kubota, Case, and New Holland. Mount in under 60 seconds — no special tools required.

CAT MM40SR Rubber Track 300x52.5Wx84 ( 12" ) Directional Block Pattern
CAT MM40SR Rubber Track 300x52.5Wx84 ( 12" ) Directional Block Pattern

Built to Pay for Itself

Backed by Rubber Tracks Warehouse engineering, the CAT MM40SR Rubber Track 300×52.5Wx84 ( 12" ) Directional Block Pattern reduces labor costs and increases productivity on every job. Ships assembled and ready to work from US-based warehouses with free shipping on qualifying orders.

Additional information

Series

PM Series™ ( Economy Model ), PR Series™ ( Heavy Duty Model )
Size

300×52.5Wx84 ( 12" )
Tread Pattern

Directional Block

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SKU: cat-mm40sr-rubber-track-300x52-5wx84-12-directional-block-pattern Category: Brand:

Our Promise

We don't ship a track until we know it fits your machine. And if it doesn't, you don't pay freight.

1-Year Parts Warranty Rubber Tracks Warehouse backs every track with a real warranty and a real US phone number — not a disconnected line.
Ships from US — Fast In-stock tracks leave from a US warehouse. Tracking emailed same day. No six-week overseas wait.
Guaranteed Fit or Money Back Doesn't fit your MM40SR? Send it back — we pay return freight both ways. No restocking fee. No runaround.

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About Rubber Tracks Warehouse Skid Steer Attachments

Rubber Tracks Warehouse is a trusted manufacturer of premium skid steer attachments. Iron Attachments is an authorized dealer offering the full Rubber Tracks Warehouse lineup with free delivery, price match guarantee, and expert support.

View all Rubber Tracks Warehouse products →

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