Chainring Offset Chart

Chainring offset is the distance measured from where the chainring bolts onto the motor to where the the chainring's teeth sit.  The larger the number, the closer your chainline will be to the center of the bike .  Both the BBS02 and BBSHD move the chain line away from the center of the bike significantly, which can cause issues like poor shifting of excessive wear on teeth when using the lowest gears.  Chainring offset can negate some of these issues.

Offset for BBSHD Chainrings

Chainring Offset 
Lekkie Bling Ring 52T 18.3mm
Lekkie Bling Ring 46T 18.3mm
Lekkie Bling Ring 42T 18.3mm
Lekkie Bling Ring 40T 16.3 to 20.3mm (variable)
Lekkie Bling Ring 36T 5.2mm
Lekkie Bling Ring 28T 5.2mm
Bafang 46T 17.5mm
California Ebike Chainring Adapter .

Offset for BBS02 Chainrings

Chainring Offset 
Lekkie Bling Ring 52T 6.5mm
Lekkie Bling Ring 46T 9mm
Lekkie Bling Ring 42T 9mm
Lekkie Bling Ring 40T 7 to 11mm (variable)
Lekkie Bling Ring 36T -0.8mm
Lekkie Bling Ring 28T -0.8mm.
Bafang 46T 5.4mm.
California Ebike Chainring Adapters .