RG158-21700 Bottom Roller Assemblies

PRODUCT DETAILS

These are aftermarket bottom track rollers designed for multiple Kubota mini excavator models, featuring clear compatibility and easy installation.

I. Core Compatible Models
This roller assembly is guaranteed to fit the following Kubota models precisely:
KX41-3 (Serial Number 40001 & above)
KX015-4, KX016-4, KX018-4, KX019-4

II. Product Specifications and Installation Quantity
Specifications:
Body width: 5 inches
Diameter: 4.5 inches
Installation Quantity: 3 bottom rollers are required per side of the equipment, totaling 6 per machine to ensure even weight distribution on the undercarriage.

III. Installation Convenience
The rollers arrive fully assembled and ready for installation as shown in the pictures, with no additional assembly needed.
Installation hardware is not included. It is recommended to retain the original bolts from the old rollers after removal for direct reuse when securing to the track frame.

IV. Alternate Part Number Explanation
This roller corresponds to the following Kubota dealer part numbers:
RG158-21700 (main part number)
RA231-21700 (compatible part number)

V. Uniqueness of Fit and Special Requirements
Uniqueness of Fit: Currently, there are no alternative models available. This roller is an exclusive compatible part, ensuring precise installation.
Steel Track Version: We also stock a steel track-compatible version of these rollers. Please indicate if your equipment uses steel tracks when ordering to avoid mismatches.

VI. Quality Assurance
The product meets the undercarriage load-bearing and guiding standards of Kubota models. As a reliable aftermarket replacement, it ensures stability and safety during equipment operation.