I looked up rear wheel hubs for my 2006 R50, and there are two options for this car, "early" and "late". How to I determine if my car is an early or a late 2006?

 

I know the lugs changed from 12mm to 14mm I believe sometime around July August. You should probably look up those changes first. I’m sure it coincides with the hubs.

 

Ah yes, found it. Thank you.

• Notes: Rear, Wheel Bearing and Hub Assembly. Later. M14 bolts. M10 x 1.5 hub bolt. Quantity per car: 2.
• Notes: Rear, Wheel Bearing and Hub Assembly. M12 bolts. Early. Quantity per car: 2.

 

April 2006 production date here. Believe the transition month is July/August. Recently had the LR hub bearing go bad; decided to swap all four corners to the late (M14) lug hubs; the earlier ones are becoming less plentiful.