How to Measure Rubber Tracks — Size Identification Guide
Every rubber track has three numbers that identify it: width × pitch × links. Getting these right is essential — an incorrect size will not fit your machine. Here's how to find your track size in under 5 minutes.
Where is the track size stamped?
The size is usually stamped or molded into the inside surface of the rubber track — the side facing the undercarriage, not the ground. Look near the edge of the track about 12 to 18 inches from any starting point. The stamp will show three numbers separated by "x" — for example, 450x86x56. On some tracks, the stamp is on the inner edge (the side that faces the frame).
If the stamp is worn off or unreadable, you can measure manually.
How to measure track width
Measure across the full face of the track from edge to edge using a tape measure. This is the width in millimeters. Common widths include:
- 320mm (13"): Mid-frame CTLs like CAT 259D3, Bobcat T590
- 400mm (16"): Mid-to-large CTLs like Bobcat T630, CAT 249D
- 450mm (18"): Large CTLs like Bobcat T770, CAT 289D3, John Deere 333G
- 300mm (12"): Mid-size mini excavators like Kubota KX080, CAT 305
- 230mm (9"): Small mini excavators like Kubota U27, Bobcat E35
How to measure pitch
Pitch is the distance between the center of one drive lug to the center of the next drive lug, measured on the inside of the track. Common pitch values:
- 86mm: Standard skid steer / CTL pitch
- 101.6mm: Multi-terrain loaders (ASV, CAT 247/257)
- 52.5mm: Common mini excavator pitch
- 72mm: Small mini excavator pitch
- 81mm: Large mini excavator pitch
How to count links
Count the total number of drive lugs (the raised bars on the inside of the track that engage the sprocket) around the entire loop of the track. This is the link count. Common link counts range from 39 (small mini excavators) to 63 (large CTLs). Don't confuse drive lugs with tread lugs — drive lugs are on the inside, tread lugs are on the outside.
What is guide type and why does it matter?
In addition to the three size numbers, you need to match the guide type — the shape of the center drive lugs that engage your sprocket. Common guide types:
- Block (B): The most common — standard on CAT, Bobcat, John Deere, Kubota
- N-Guide / K-Guide: Offset style used on some mini excavators
- W-Guide: Wide guide for specific mini excavator models
- T-Guide: Takeuchi-specific guide pattern
Installing the wrong guide type will cause the track to ride incorrectly on the sprocket, leading to rapid wear and potential derailment.
Still not sure? Here's the fastest way to find your size
Use the TrackTECH Track Finder — enter your machine make and model and we'll show you the verified track size, guide type, and available tread patterns instantly. You can also call (850) 816-7898 and our team will look it up for you.
Browse popular sizes: 450x86x56 | 450x86x55 | 450x86x58 | 320x86x52 | or browse all tracks.