Mini Bike Wheel Centers 4 Hole or D Slot (Set of 2) What Style Slot?:D Slot The 4 hole are for

The 4 hole are for early z50 models and the D slot are for later z50r models

The RPM rating of the disc/blade must be higher than that of the angle grinder

Use the correct wheel for the machine's size and speed

A cutting disc should not be used for grinding

under ANY circumstances remove the safety guard

Mini Bike Wheel Centers 4 Hole or D Slot (Set of 2) What Style Slot?:D Slot The 4 hole are forThese wheel centers bolt on to a stock Honda z50 hub. They allow you to upsize the wheel from the original 8" to 10" using Honda ct70 rim sets (not included). The 4 hole are for early z50 models and the D slot are for later z50r models. Sold in a set of 2.