The RUDDOG 12x21x5mm Ceramic Engine Bearing is a specific rear engine bearing. It features a durable PA66 fiberglass-reinforced nylon cage as well as high-quality steel balls. The 12x21x5mm bearing fits the OS Engines T12 engines, among many others.

Dimensions: 12x21x5mm
Cage: PA66
Ball Material: Ceramic
Seals: none

The engine bearing fits the following engines:

- OS Engines T1203
- OS Engines T1204
- ONE Engine T1204