400x72.5x74 Track Size Meaning & Compatible Machines

Quick answer: 400×72.5×74 on a rubber track means 400 mm width × 72.5 mm pitch × 74 links. It is not a steel track-shoe bolt pattern. That size must match your machine’s undercarriage; common listings include Bobcat 337/341/435-class machines (and other brands on the same geometry). Always confirm against the stamp on your old track and the product fitment list before ordering.

How to Read 400×72.5×74

Number	Means	Why it matters
400	Track width (mm)	Ground pressure and clearance in the frame
72.5	Pitch (mm) — distance between link centres	Must match sprocket tooth spacing
74	Number of links	Sets overall track length around the undercarriage

Stamps sometimes look like 400x72.5x74, 400×72.5×74 or with a tread letter (for example W or N) in the middle of a product SKU. The three numbers are still width, pitch and links. Full primer: rubber track size guide (pitch, width, links).

Compatible Machines (From Product Fitment Lists)

Examples of machines listed on AFTparts products for this size family:

• 400×72.5×74 (W tread listing): Bobcat 337, 341, 341G, 435, 435AG, 435C and related E45/E55-class listings on that product — see 400×72.5×74 rubber track (Bobcat 337/341/435 listing)
• 400×72.5×74 (N tread listing): Komatsu PC40MR-2, PC45MR-3, PC50FR-2 and other models on that product — see 400×72.5×74 rubber track (Komatsu PC40/PC45/PC50 listing)

Same three numbers do not always mean one universal part — tread pattern (W vs N) and exact machine list still matter. If your stamp differs by even one number, it is a different track. Related size article: 300×52.5×80 rubber tracks: size, fitment and tread.

How to Confirm Before You Buy

1. Read the size moulded on the inside of the old track
2. Count links or measure pitch if the stamp is worn
3. Match your model against the product’s “Suitable for Machines” list
4. Browse other sizes in rubber tracks or the Canada tracks page

400×72.5×74 FAQs

Is 400×72.5×74 a steel track shoe size?

No. On rubber tracks sold here, it is width × pitch × links. Steel shoe bolt patterns use different notation.

What does the W or N in some SKUs mean?

It usually marks tread/pattern style on that listing. Confirm both the three numbers and the tread against your job and the fitment list.

Can I fit 400×72.5×74 if my stamp says 400×72.5×72?

No — different link count means different length. Order the exact size.

Where is the size guide?

See the engineer's rubber track sizing guide.

Not sure which part fits your machine? Send the model, part number or track size through Check Fitment before you order.