Three-Piece Cranks (on some models)
Maintenance
Both
[2]at the factory. After riding the bicycle the first few times, make sure the crank arms have not loosened. If either crank arm has loosened during this
Frequently check the tightness of the crank arms. If loose, have them tightened by a bicycle service shop.
CAUTION: If you ride the bicycle for a moderate length of time with a loose crank arm, the spindle
will damage the crank arm.
Tires
Maintenance
Frequently check the tire inflation pressure because all tires lose air slowly over time. For extended storage, keep the weight of the bicycle off the tires.
WARNING: Do not ride or sit on the bicycle if either inner tube is under inflated. This can damage the tire and inner tube. Do not use unregulated air hoses to inflate the inner tubes.
An unregulated hose can suddenly over inflate bicycle tires and cause them to burst.
Use a hand or a foot pump to inflate the inner tubes. Service station
Before adding air to any tire, make sure the edge of the tire (the bead) is the same distance from the rim, all around the rim, on both sides of the tire. If the tire does not appear to be seated correctly, release air from the inner tube until you can push the bead of the tire into the rim where necessary. Add air slowly and stop frequently to check the tire seating and the pressure, until you reach the correct inflation pressure.
Replace worn or defective tires and inner tubes.