green bearings are low rolling resistance ball bearings
original are cone rollers or rollers
I'd stick with original types as they are designed to go round corners...
someone somewhere at dana spicer BorgWarner etc decided 60 years ago that ball bearings were no good and rollers should be used on axles retained by a collar at the end and nothing in the centre...
I trust that man cos i drive on the street.
plenty use green bearings for all applications but i'd rather just stick with what the designer had in mind
i.e trouble free long life good for 100K
Dave
The Greater Knapweed near the Mugwort by the Buckthorn tree is dying