Metal, chrome-plated, right, short (thread 35mm)
R45/R65 to 1985, /7 models, CS 9/1980-*
Genuine part quality
Compare: 51161237640 / 51-16-1-237-640
Wheel bearing - rear swinging fork bearing
For boxer...
M4 x 176 VA polished
75/6 to R100 models, R80ST...