What size tracks fit a Kobelco SK55SR?

The Kobelco SK55SR takes 400x72.5x74 tracks as its primary size.

What other machines share Kobelco SK55SR tracks?

20 other models take the same primary size, including Bobcat E45, Bobcat E50, Bobcat E55, Case CX55B, Hitachi ZX50U.

Kobelco SK55SR Tracks

Mini excavator · current model · produced ~2019 (approximate, used-listing derived, nearby variant SK45SRX-6E) · positive-drive undercarriage · independently corroborated

The Kobelco SK55SR takes 400x72.5x74 rubber tracks (400 mm, about 16 in wide; 72.5 mm pitch; 74 links).

Fitment detail

Configuration	Size	Width	Pitch	Links
Primary	`400x72.5x74`	400 mm / ~16"	72.5 mm	74

Specifications and sources

Spec	Value	Source
Primary track size	400x72.5x74	skidsteers.com
Production years	2019 (approximate, used-listing derived, nearby variant SK45SRX-6E)	machinerypete.com

Track size independently corroborated by a second source: grizzlyrubbertracks.com.

Tracks you can buy for the SK55SR

Available tread patterns (schematics are our own drawings, verified against seller product photos):

BD 1
MX 1

2 products across 1 sellers — every distinct tread pattern and duty tier we verified. Observed prices, dated.

`400x72.5kx74` 2 options

Tread	Duty	Price	Stock	From
BD	Heavy	$3654.00 / pair	in stock	skidsteers.com
MX	Heavy	$4270.50 / pair	out of stock	skidsteers.com

Available from

Seller	Observed price	Options seen	Ships	Checked
grizzlyrubbertracks.com	$1295–$1485 / track	block · standard, HD	next-day to 37 states; same-day pickup in 17 states	2026-08-19
skidsteers.com	$3654.0–$4270.5 / set	· HD	not stated	2026-08-19

Sellers listed alphabetically — every seller we independently verified for this machine. Prices are observed public listings on the dated check, not offers by this site; this site sells nothing and has no affiliate relationships.

These tracks also fit

20 other machines take the SK55SR's primary size (400x72.5x74):

Kobelco track size chart: every model →

Part number cross-reference

Component	OEM part #	Aftermarket ref	Source
Track	—	`CH135-51-72-39L`	skidsteers.com

Before you order

Width, pitch, and link count must all match — measure your current tracks to confirm, and check your operator's manual for serial-number-specific variations.

Data verified 2026-10-01; aftermarket cross-reference sizes, independently corroborated across two sources.

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