What size tracks fit a Caterpillar 303.5DCR?

The Caterpillar 303.5DCR takes 300x52.5x90 tracks as its primary size.

What other machines share Caterpillar 303.5DCR tracks?

8 other models take the same primary size, including IHI 35NX, IHI 35NX-2, IHI 35V-4, IHI 35V-5, IHI 35VX.

Caterpillar 303.5DCR Tracks

Mini excavator · current model · independently corroborated

The Caterpillar 303.5DCR takes 300x52.5x90 rubber tracks (300 mm, about 12 in wide; 52.5 mm pitch; 90 links).

Fitment detail

Configuration	Size	Width	Pitch	Links
Primary	`300x52.5x90`	300 mm / ~12"	52.5 mm	90

Specifications and sources

Spec	Value	Source
Primary track size	300x52.5x90	skidsteers.com

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

Tracks you can buy for the 303.5DCR

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

Nd 1
MX 1

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

`300x52.5wx90` 4 options

Tread	Duty	Price	Stock	From
Nd	HD	$1669.50 / set	yes	skidsteers.com
MX	HD	$2097.90 / set	no	skidsteers.com
CAT 3035DCR Set of 2 12" Extreme Duty Steel T...	XD	$3281.40 / set	no	skidsteers.com
CAT 3035DCR Set of 2 12" Extreme Duty Steel T...	XD	$3716.10 / set	no	skidsteers.com

Available from

Seller	Observed price	Options seen	Ships	Checked
grizzlyrubbertracks.com	$915–$1417 / track	block	next-day to 37 states; same-day pickup in 17 states	2026-08-19
skidsteers.com	$1669.50–$2097.90 / set	multi-bar · HD, XD	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

8 other machines take the 303.5DCR's primary size (300x52.5x90):

Caterpillar track size chart: every model →

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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