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Rubber Track Size Codes: What Every Number Means and Which Machines Use Them

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Rubber Track Size Codes: What Every Number Means and Which Machines Use Them
Posted on by AFT Parts

A rubber track size code carries three numbers and one letter, and every one of them matters: width, pitch, and link count, plus a tread letter where it appears. Read them wrongly and the belt will not tension. This page works through the common codes and the machines that take them. It sits inside the Rubber Tracks guide.

Mini excavator codes

230x48x70 tracks, 300x52.5x80, 300x52.5Nx84 and 300x52.5Nx88 cover the small end; choosing the right size is the method, and the Mustang ME1402 specification a worked example.

Compact track loader codes

320x86x52 for CTLs in Ontario, 450x86x55 features and applications, 450x86x56 and the machines that use them and which skid steers need 450x86x56 cover the loader class; choosing track width for a skid steer is the decision behind it.

Wider and specialist codes

450x100Tx48 and 450x100Tx50 cover the wide end, and the Vermeer CTX100's 230x72Kx45 the narrow specialist case.

Tread letters and patterns

Which tread pattern suits an excavator and recent tread design changes cover the letter and the lug, which the tread and terrain guide takes further.

FAQs

Which of the three numbers matters most?

Pitch. It has to engage the sprocket exactly, so a pitch error is not something that can be adjusted for.

Can I change width for stability?

Only where the machine was offered with the wider option. Width changes ground pressure and the load on the final drive.

Do I need the exact link count?

Yes. A belt one link out will not tension correctly, and the adjuster runs out of travel immediately.

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