How to Read Rubber Track Specifications: Width, Pitch, and Link Count Decoded 

Every rubber track has three numbers that define it: width, pitch, and link count. You’ll see them written as W × P × L for example, 300 × 52.5 × 80. Order the right spec and the track fits perfectly. Get any one of the three wrong and you’re either returning the track unused or, worse, forcing it onto the undercarriage and damaging components in the first few hours of operation. 

This guide explains what each number means, how to find the correct specification for your machine, how to measure a worn or unmarked track when you have no other option, and what actually happens when the numbers don’t line up. 

W Width 

The first number is the nominal track width in millimetres, measured across the outer tread face. A 300mm track is 300mm wide at the design dimension. Width affects ground pressure and flotation wider tracks spread the machine’s weight over a greater area, which matters in soft or sensitive ground. 

Common widths for mini excavators in the Australian market run from 180mm for the smallest machines up to 450mm for larger units. Compact track loaders generally run wider: 320mm to 450mm. These are nominal dimensions as-manufactured tracks may vary by a few millimetres, and wear at the tread edges will reduce the apparent width on an older track. 

Don’t measure the width of a worn track and use that as your order dimension. Tread edge wear is uneven and will give you a number smaller than the nominal specification. Use the machine spec instead. 

P Pitch 

Pitch is the centre-to-centre distance between adjacent track link holes the steel bushings pressed into the track body at regular intervals. It’s also the distance between sprocket teeth. The two must match. 

This is the dimension you cannot get wrong. If the pitch of the track doesn’t match the pitch of the sprocket, the teeth won’t seat cleanly in the link holes. Instead of rolling smoothly, the sprocket rides up over the bushing tops, generating violent vibration, hammering the sprocket faces, and rapidly destroying both the sprocket and the track. A mismatch of 2 to 3mm is enough to cause this it’s not a tolerance you can work around. 

Common pitches in the Australian market: 33mm (very small machines), 47.63mm, 48mm, 52.5mm, 55mm, 72mm, 86mm, 90mm, and 101.6mm. The 47.63mm and 48mm pitches look similar on paper but are not interchangeable. If you’re unsure which applies to your machine, measure rather than guess. 

L Link Count 

The link count is the total number of bushings in the complete track loop. It determines the track’s overall circumference and must match the geometry of your undercarriage specifically the distance between the drive sprocket and the front idler. 

A track with too few links is shorter than the undercarriage requires. You’ll either be unable to install it, or you’ll force it on and it will run permanently over-tensioned, grinding down every bearing in the undercarriage from day one. A track with too many links is longer than required and will run permanently slack regardless of how much you adjust the idler which means repeated de-tracking. 

Mini excavator link counts typically range from 36 to 48. Compact track loaders usually run 74 to 90. There’s no flexibility here the way there can be with other consumables the correct link count is the correct link count. 

Finding the Right Specification for Your Machine 

From the parts manual or OEM parts database 

The most reliable method. The OEM parts catalogue lists the track specification under the undercarriage section, indexed by model and serial number. Online parts databases for Kubota, Yanmar, Bobcat, CAT, Takeuchi, and Hitachi all support this lookup. If your machine is a common model, this should take five minutes and give you the definitive answer. 

By direct measurement of an intact track 

If the manual isn’t available, a track in good condition can be measured directly. For width, use a steel tape or vernier calliper across the outer tread face at the mid-point of the track length, well away from worn edges. For pitch, measure centre-to-centre across at least five consecutive bushings and divide by five averaging across multiple links eliminates the error that individual worn bushings can introduce. For link count, count the bushings around the complete loop. This is easiest with the track off the machine, but can be done by raising the machine and rotating the track slowly, counting links as they pass a fixed reference point. 

Through TFI’s cross-reference database 

Tradefaire International maintains a model and serial number cross-reference covering most machines operating in Australia. Call 1300 916 556 with your machine make, model, and serial number and we’ll confirm the correct W × P × L before you place an order. 

Measuring a Worn Track 

Worn tracks need extra care. Width measured at the outer tread edge will read low measure instead at the base of the lug profile where the tread meets the track body. Pitch can be misleading on a heavily worn track: bushings elongate under load over time, making the effective pitch appear larger than the stamped specification. If the average measured pitch is more than 2% above the nominal, the track is stretched beyond serviceable limits don’t use that measurement to specify a replacement. Use the machine’s OEM specification. Link count remains reliable on a worn track. 

The short version: if the track is significantly worn, the only safe basis for ordering is the machine specification, not dimensions from the old track. 

What Goes Wrong When the Spec Is Wrong 

Specification errors are almost always avoidable. Tradefaire International offers free specification confirmation. Give us a call on 1300 916 556 before you order and we’ll verify the correct W × P × L for your machine. A five-minute call is considerably less expensive than a return freight and a delay on-site.