ABC QUICK CHECK
A is for air
Inflate tires to rated pressure as listed on the sidewall of the tire
Use a pressure gauge to insure proper pressure
Check for damage to tire tread and sidewall; replace if damaged
B is for brakes
Inspect pads for wear; replace is there is less than 3mm of pad left
Check pad adjustment; make sure they do not rub tire or dive into spokes
Check brake lever travel; at least 2cm between bar and lever when applied
C is for cranks, chain and cassette
Make sure that your crank bolts are tight; lube the threads only, nothing else
Check your chain for wear; 12 links should measure no more than 30.8 cm
If your chain skips on your cassette, you might need a new one or just an adjustment
Quick is for quick releases
Hubs need to be tight in the frame; your quick release should engage at 90°
Your front hub quick release should point back to insure that nothing catches on it whilst your rear should point forwards .
Inspect brake quick releases to insure that they have been re-engaged
Check is for check it over
Take a quick ride to check if derailleurs and brakes are working properly
Inspect the bike for loose or broken parts; tighten, replace or fix them
Pay extra attention to your bike during the first few miles of the ride
A well maintained bike is much more enjoyable to cycle and more importantly is much safer too .
Happy cycling .