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Kubota KX 121-2 Bottom Track Roller

Kubota KX 61-2 Bottom Roller RC101-21803
Rubbertrax
Kubota KX 121-2 Bottom Track Roller
This is the replacement aftermarket bottom (center) track roller for the Kubota KX 61-2 and many other mini excavator models. Save online and skip the trip to the dealer. Kubota bottom roller assemblies quality for free shipping when you order online and ship to a commercial address.
SKU: RC101-21803
Weight: 17 lbs
Make: Kubota
Price: $225.00

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.

This is the aftermarket replacement bottom roller for Kubota KX 61-2, 61-2SS, KX 121-2 (must verify serial), and KX 121-2SS mini excavators.


Alternate Part Numbers

  • Kubota Dealer Part Number: RD101-99900, RD301-99900, RC101-21803, RC101-21800
  • Kubota Dealer Part Number: RD101-21902, RC301-21902

Optional Part Availability

The RD101-99900 roller is known to be interchangeable with the RC101-21803, and RD301-99900 for the KX61-2, KX71-2, KX91-2 and U35 models. (The U35-3 takes the RB511-21702)

Alternate Models

This bottom roller assembly (RC101-21803) is known to fit:

  • Kubota KX 61-2
  • Kubota KX 61-2 SS
  • Kubota KX 71-2
  • Kubota KX 91-2
  • Kubota KX 121-2 (must verify serial number)
  • Kubota KX 121-2 SS
  • Kubota RX 302

Quality Kubota Rollers

Our rollers are backed by the factory with a standard warranty for guaranteed quality. These Kubota track rollers do not come with installation hardware, so keep the bolts when you remove the previous rollers.

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


They are sold individually but we always encourage changing all worn bottom rollers at the same time to maximize the lifespan of the undercarriage.

View our other Kubota KX 61-2 undercarriage parts.

View our other Kubota KX 71-2 undercarriage parts.

View our other Kubota KX 91-2 undercarriage parts.

View our other Kubota KX 121-2 undercarriage parts.