To safely ride your bike you need these items

A basic knowledge of bike safety
Know your local laws
A properly fitted helmet
Correct seat adjustment
Properly working brakes
A bicycle horn
A license
Basic bicycle repair
Wear proper clothing when riding a bicycle
Properly adjusted handlebars
Properly configured tires
Properly inflated tires
A proper bicycle seat
A bicycle lock
The proper size bicycle
The correct gender bicycle
A bicycle headlight
Proper bicycle maintenance
Any other necessary bicycle accessories