What size bearing do I need...?

Question

For a 78 mm wheel on an inline skate?

Answer 1

The bearing cases will be the same size no matter the size of the wheels the Abec-3 -> Abec 9 Bearings number have to do with the size of the bearings in the case. The higher numbered ones are generally faster. Though the best overall ones are the Swiss Boss Bearings. All depends on what you want to spend.