Mini Excavator Rubber Track Size Chart by Make & Model

This excavator track size chart lists every mini excavator rubber track size we currently stock at AFTparts Canada, grouped by make and the models each listing names. Use it to go from your machine model to a track size in a few seconds, then click the size to open the product page and confirm fit. If you need the theory behind the numbers, our guide to mini excavator track sizes explains the size codes, and the Excavator Tracks and Undercarriage Engineering guide covers how tracks work. This page is the quick lookup.

Excavator Track Size Chart: The Quick Answer

To use an excavator track size chart, find your machine make and model, read the matching size (width x pitch x links, in millimetres and link count), and match every part of the code, including any letter. Then confirm the fit against your old track or the product page before ordering. Width, pitch and links must all match.

How to Read the Excavator Track Size Chart

Every rubber track size is written as width x pitch x number of links, all in millimetres except the link count. For example, 300x52.5x80 means a 300 mm wide track, 52.5 mm between link centres, and 80 links around the loop. A letter after the pitch (such as N, W, B, Q or ZZ) usually marks a guide or tread variant, so two tracks with the same three numbers are not always interchangeable. Check the letter against your old track before ordering.

• Width (mm): measured across the track face.
• Pitch (mm): centre-to-centre distance between two drive lugs. It must match your sprocket; see how to measure sprocket pitch.
• Links: count the drive lugs on the inside of the track.

If the size is moulded on the inside of your old track, read it there first. Some sizes, such as 400x72.5x74, have their own explainer.

Mini Excavator Rubber Track Size Chart by Make & Model

Model names below come from each product listing on our store. AFTparts tracks are aftermarket parts: they fit these machines by matching size, and they are not OEM parts from the machine makers. Click a size to see the current price and full fitment list on the product page.

Make	Models listed	Track size	Width (mm)	Pitch (mm)	Links
Bobcat	231 329 331 334 425 428 E26 E32	300x52.5Nx80	300	52.5	80
Bobcat	320, 321, 322, 323, 322G, E16, E322	230x96x33	230	96	33
Bobcat	324 E16 E17 E19	230x48x66	230	48	66
Bobcat	325, 325D, 325G, 328, 328D, 328G	300x52.5Nx74	300	52.5	74
Bobcat	335	300x52.5Nx92	300	52.5	92
Bobcat	E42 430 335	300x52.5Nx90	300	52.5	90
Bobcat	337, 341, 341G, 435, 435AG, 435C	400x72.5Wx74	400	72.5	74
Case	CX20B, CX20BMR, CX22B, CX22BMC	300x52.5Nx76	300	52.5	76
Case	28 MAXI, CK28, CX28	300x52.5Wx78	300	52.5	78
Case	35, 35 MAXI, 35STB, CK35	350x52.5Wx86	350	52.5	86
Case	CX36, CX36B, CX36BMC, CX36BMR	300x52.5Nx88	300	52.5	88
Case	50 MAXI, 50RTB, CK50, CK52, CX50	400x72.5Nx72	400	72.5	72
Caterpillar	erpillar ME08, ME08B, MM08B	180x72x36	180	72	36
Caterpillar	303.5E2CR, 303.5D, 303.5E, 303.5E2, 303.5C	300x52.5Wx90	300	52.5	90
Caterpillar	erpillar 304DCR,304ECR	350x52.5Wx90	350	52.5	90
Caterpillar	304, 304.5, 305, MM45T, MM46, MM55SR	400x72.5Wx72	400	72.5	72
Caterpillar	erpillar 304CCR, 305.5DCR, 305.5ECR, 305C	400x72.5Wx76	400	72.5	76
Caterpillar	erpillar 308CCR, 308CSR, 308DCR	450x81Nx78	450	81	78
Hitachi	EX30.2, EX30, EX30.1	300x52.5Nx82	300	52.5	82
Hitachi	EX35U, EX36U, UE35, ZAXIS30	300x52.5Nx86	300	52.5	86
Komatsu	PC15-7,PC20MRX UTILITY	300x52.5Nx78	300	52.5	78
Komatsu	PC40MR-2, PC45MR-3, PC50FR-2	400x72.5Nx74	400	72.5	74
Kubota	HG, KH012G, KH012HG, KH014	230x72x42	230	72	42
Kubota	KX 41.3V	230x96x35	230	96	35
Kubota	KX41.2S, KX41.2SC	230x48x64	230	48	64
Kubota	KX121-3 KX040-4 KX040-5	350x54.5x86	350	54.5	86
Kubota	KX75UR, KX75UR-3, HR31, TB070	450x81Wx76	450	81	76
Kubota	KX080.3, KX080.4, KX80	450x81.5x76	450	81.5	76
Maeda	MC-285CRM	230x72x44	230	72	44
Messersi	M08E, M16, M18, M20	230x72x45	230	72	45

Don't see your model? Browse all rubber tracks, or the Bobcat and Kubota collections. For a Kubota U17, check the Kubota U17 parts collection and our Kubota U17 track replacement guide.

Popular Sizes in This Chart

300x52.5x80

The 300x52.5Nx80 track is listed for Bobcat 231, 329, 331, 334, 425, 428, E26 and E32. Machine specs for these models are on the maker sites, for example the Bobcat E26 and Bobcat E32 pages.

400x72.5x74

The 400x72.5Wx74 track is listed for Bobcat 337, 341, 341G, 435, 435AG and 435C. Note the W suffix; a 400x72.5Nx74 version is listed separately for Komatsu PC40MR-2, PC45MR-3 and PC50FR-2.

230 mm sizes

Narrow 230 mm tracks cover micro and compact machines such as the Kubota KH012 family, Kubota KX41 models and Bobcat 320 to 324 series. Link counts vary from 33 to 66, so count carefully. For the Kubota 350x54.5x86 size, the Kubota KX040-4 page lists the machine specs, and the Kubota U17 page covers that model.

Same Width, Different Track: Common Mix-Ups

The chart shows several sizes that share a width and pitch but differ by link count, for example 300x52.5 with 74, 76, 78, 80, 82, 86, 88, 90 or 92 links. A track with too few links will not go on; too many and it sags and can derail. If tracks keep slipping off, read why an excavator track comes off during use before you buy, because worn sprockets, idlers or a bad tension cylinder can cause the problem even with the right size.

How to Measure an Old Track When the Size Has Worn Off

Park the machine on level ground, lower the blade and boom so the tracks are unloaded, and shut the engine off. Then:

1. Measure straight across the track face for the width in millimetres.
2. Measure from the centre of one drive lug to the centre of the next for the pitch. Measuring across several lugs and dividing gives a steadier number.
3. Mark one lug with chalk and count every lug around the loop for the link count.
4. Look at the guide lugs: note whether they sit in one row or are offset, because that is what the letter in the code often describes.

Write down all three numbers and a photo of the inner face. That is everything we need to check a size for you.

Machine Model or Track Size: Which to Search By?

Search by machine model when you know it and the serial range is standard; the chart above does that. Search by track size when the machine has been modified, came from another market, or the old track is not original. Size is the safer check, because one model name can cover several production runs with different tracks. When the two disagree, trust the measured size on the machine and ask us to confirm.

Safety When Changing Mini Excavator Tracks

Tension cylinders hold grease under high pressure. Release tension slowly through the valve, keep your face and hands away from the fitting, and never work under a raised machine without proper support. See OSHA's excavation safety guidance for general site safety, and follow your machine's operator manual for the track procedure.

How to Confirm Fit Before You Order

1. Read the size on the inside of your old track, or measure width, pitch and links.
2. Note any letter in the size code and compare it with the listing.
3. Check your machine model and serial range against the product page fitment list.
4. Still unsure? Send your model, serial number and old track size through our Check Fitment form and we will confirm before you order.

For more on buying in Canada, see our mini excavator rubber tracks in Canada page.

Excavator Track Size FAQ

Where is the size printed on a rubber track?

Most tracks have the size moulded on the inner surface or the side. If it has worn off, measure width, pitch and link count as shown above.

Can I use a wider track than the original?

Only if the machine maker allows it for your model and the pitch and link count still match. Width changes affect clearance and ground pressure, so ask us first.

Do tracks with the same numbers always interchange?

No. Guide type and tread pattern letters (N, W, B, Q, ZZ and others) can differ. Match the full code, not just the three numbers.

Are these OEM tracks?

No. They are AFTparts aftermarket rubber tracks made to fit the listed machines by size.