There are some problems that you will probably not be able to catch in your quick bike check. These problems are probably minor but they can make a big difference between a good bike and a great bike.

ONE

The most common problem is not having the right kind of riding position.

TWO

If you are able to lift the chain off the chainring, there is a good chance that the chain is worn. This looseness will cause the chainring and sprockets to wear out faster than normal. Also, changing gears will be inaccurate.

THREE

If the chain wants to jump off the sprockets, you can try to deal with this by readjusting the rear derailleur from scratch. If the readjustment doesn't work, there is a good chance that the chain is too long. A good sign of proper chain length is that when the chain is on the biggest chainring and the biggest sprocket, the chain cage should turn roughly to the floor.

FOUR

Brakes should not make a sound when they are applied. If there is some sound, it might be from the steel bolts rattling in the alloy threads. Fix this by applying a small amount of anti-sieze to the chain wheel, saddle bolts, and stem.

FIVE

If while pedaling there is some noise and stops when you stop pedaling, there is a possiblity that the indexing to the rear derailleur isn't set up and working properly. To fix this, you need to try and turn the cable adjuster on the rear gear about a half-turn counter-clockwise.

SIX

If your brakes chatter, this might be a sign that the headset is badly adjusted. Wrap your fingers around the bottom beace and put the front brace on. If you can feel any movement, it is best for you to have the headset looked at as soon as possible.

SEVEN

Pedals that have bearings that grind or bent axles make it impossible to pedal. Check to see if the axle is straight. Also, check the bearings by removing the front crank.

EIGHT

Poor braking could be from contaminated brake pads. Grease and oil could be built up on the rim. Remove this from alcohol. If alcohol cleaning doesn't restore the brake pads, they should be replaced.

NINE

Noisy brakes could mean that the pads are not aligned properly. The front edge of the brake pad should be at least 1/32mm closer than the back edge of the brake pad.

TEN

If your tire wall looks worn, it is best to deflate it and look for cuts and splits. A tire that looks good from a distance isn't really in good condition up close. Replace it.