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Kubota U55-4 Tension Idler Assembly

RD451-21302
Rubbertrax
Kubota U55-4 Tension Idler Assembly
Buy the premium aftermarket replacement idler assembly for a Kubota mini excavator model U55 online at Rubbertrax and save money versus going to the dealer. This idler is guaranteed to fit and comes completely assembled with the bearing with no pressing or modification required. Ready to install. Save online and skip the trip to the dealer. This idler assembly ships free when you check out online.
SKU: RD451-21302
Weight: 116 lbs
Make: Kubota
Shipping: Fast and Free!
Price: $855.00
Availability: Currently Out of Stock

Rubber tracks and wear parts are sold individually unless specified in the details. We offer free shipping across the USA when you order online and ship to a commercial address. *Some restrictions apply.

RD451-21302 Kubota Idler Assembly

This is the aftermarket replacement tension idler assembly for the following Kubota mini excavator models:


  • Kubota U55
  • Kubota U55-4
  • Kubota U55-5

We sell the tension idlers individually or you can call for package pricing on full undercarriage replacement parts for the Kubota U55 series and newer models.


This is the larger roller opposite of the sprocket that tightens the rubber track when you grease up the tensioner.

We stock the rubber tracks, sprockets, and rollers you need to keep your Kubota properly maintained. Most of these are relatively easy do-it-yourself replacement projects so save money on labor by doing it yourself and save money by buying aftermarket parts online that are the best quality available for the best value overall. Be sure to read your user and operator manuals for all instructions on installing items yourself.



Alternate Part Numbers

  • Kubota Dealer Part Number: RD451-21302, RD461-21300

Kubota Parts Online

These single flange idler assemblies are made to original specifications and produced with high-quality double lip seals to lock dirt and debris out and lock the lubrication in for long-lasting service for your machine. The yokes are installed and this assembly arrives ready to be installed in your track frame.