A is for AIR
Are the tyres pumped to correct pressure—stamped onto side wall of tyre
Adult Bikes: Hybrid Bikes 40-70PSI,
Knobbly Mountain Bike tyres: 50-80 PSI
Road Bike tyres: 90-110PSI
Kids bikes: Little kids 30-40PSI, Pre teens: 40-60PSI
Also check the tyres for signs of wear in the tread or crack on the side walls
B is for BRAKES
Do both brakes stop the bike when applied, yet leave a gap at handlebar
Are the brakes allowing the bike wheel to roll freely (not rubbing)
C is for CHAIN
Is the chain able to spin backwards freely—if not check the gears are in the correct alignment?
Free of dirt/muck and not dry/rusted
D is to DROP the Bike
Drop the bike to the ground from about 5cms. Are there any funny clanging sounds—this can indicate a loose part to the bike.
Investigate and speak to your local bike shop or bike mechanic
E is for handlebar ENDS
Are the holes at the end of the handlebar covered? These can be quite dangerous if they are exposed and you have a crash