Free Shipping to commercial address. *Restrictions apply


Our Products: Kubota

Kubota KX 121-2 Lower Roller

Kubota KX 121-2 Bottom Rollers RD101-99900
Kubota KX 121-2 Lower Roller
Buy aftermarket replacement Kubota KX 121-2 bottom track rollers online and save. This roller also fits the Kubota RX302. Save online and skip the trip to the dealer. This roller ships free when you check out online.
SKU: RD101-99900
Weight: 18 lbs
Make: Kubota
Shipping: Fast and Free!
Price: $202.00

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.

RD101-99900 Bottom Rollers

The RD101-99900 is a direct replacement for several Kubota OEM part numbers, so this specific roller covers a wide range of the previous generation -2 series model mini excavators. 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.

This roller fits the following models:

  • 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


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.


Alternate Part Numbers

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

Fitment Options

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)