Superduper
Platinum Member
- Joined
- Jul 18, 2006
- Messages
- 523
- Location
- Somewhere, over the rainbow.
- Tractor
- John Deere 3120, Kubota BX2350, Deere X740
The 3x20 series uses group size 51R. This is not the easiest to find size although the yellow top optima is what I use and recommend. They are around $180. The larger commoner sizes are too big.