Ultra Special Size RACING BEARING unique to K&B
This is a metric/inch mix custom size bearing with racing nylon retainer.
This was used only on some K&B 7.5 series engines

1.125 od .592 ID - 15MM
28.575mm od 15mm id

WAYS TO TELL WHICH BEARING YOU HAVE:

Measure the ID

THE 15 MM USES A CRANKCASE THAT THE BORE FOR THE CRANKSHAFT IS THE SAME DIAMETER THROUGH. THE 17MM HAS A STEP ON THE SIDE OPPOSITE THE EXHAUST SIDE.

15mm x 1.125 inch x .250 inch