Ball differential offset ring gear

JAN code:
4562456365509
Item code:
R31W211
Maker price:
\550 JPY
Sale price:
\510 JPY
Manufacture:
R31WORLD
Weight:
8g
Categories:
Related ring gear/GRK driving relationship
To use when assembling the Ketsukakigia to GRK global is ball differential offset ring gear.

17T. please prepare when Crossed Ketsukakigia of 18T.
(Genuine of 16T. With this ball differential offset ring gear. since the position of the housing comes in a good position of balance. is there is also a kind of usage)