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Kubota KX121-3 KX040-4 Lower Track Roller

Kubota KX121-3 KX040-4 Bottom Track Rollers RD118-21700
Rubbertrax
Kubota KX121-3 KX040-4 Lower Track Roller
Buy Kubota KX 121-3 bottom track rollers online at Rubbertrax. Replace all of your worn track rollers at the same time to minimize wear on the undercarriage and maximize the lifespan of the rollers. KX121-3 bottom track rollers are for sale online with free shipping during check out.
SKU: RD118-21700
Weight: 18 lbs 6 ozs
Make: Kubota
Shipping: Fast and Free!
Price: $250.00

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This is the replacement aftermarket bottom (center) roller for the Kubota KX 121-3, KX 121-3SS, KX 121-3ST, and Kubota KX 040-4 mini excavators. Take advantage of huge savings versus purchasing through your original Kubota equipment dealer.


This bottom roller is also known as RD148-21700. These rollers are simple to change, and you can install the new rollers without removing the rubber track from the machine. There are only two bolts that attach each roller to the track frame. Do not over tighten with an impact.


The bottom rollers support and guide the machine on the track and carry the weight of the machine while it is traveling or digging.



This Kubota bottom track roller fits the following models:
  • Kubota KX 121-3
  • Kubota KX 121-3 SS
  • Kubota KX 121-3ST
  • Kubota KX 040-4

We now stock the steel track version of these rollers so please indicate if you are running steel tracks on your mini excavator.

Kubota KX121-3 Undercarriage Parts

Here is the complete line of undercarriage parts for the Kubota KX 121-3 including the rubber track, Drive Sprocket, Bottom Rollers, Top Rollers, and Tension Idler.

Alternate Part Numbers

  • Kubota Dealer Part Number: RD118-21700

Alternate Kubota Models

This bottom roller assembly (RD118-21700) is known to fit:

  • Kubota KX 121-3
  • Kubota KX 121-3 SS
  • Kubota KX 121-3ST
  • Kubota KX 040-4

Quality Kubota Parts

These dual flange outside guide type bottom rollers 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. These rollers are a direct fit replacement roller designed for use on the original Kubota rubber track guide system. Guaranteed fit.