Cut fuel costs and extend the life of your tires at City Garage.

Why replace the compressed air in your tires with nitrogen:

1. Poorly inflated tires are the #1 cause of poor MPG.
2. Over-inflated tires are just as bad as under-inflated tires. Both over and under-inflated tires cause excessive tire wear and poor MPG.
3. Nitrogen holds the correct tire pressure six times longer than compressed air.
4. It is critical that your tire inflation pressure is always within the manufacturer's specifications. Ask your City Garage Service Writer where to find, and how to read, the tire placard on your vehicle. Accurate tire pressures ensure the safe handling and appropriate ride characteristics in your vehicle. Ride, handling and road noise concerns may also be caused by improperly adjusted tire pressure.

Tire Inflation Tips

• Generally, a 10 degree temperature increase will result in an increase in tire pressure.
• The definition of a "cold" tire is one that has been sitting for at least 3 hours, or driven no more than 1 mile.
• Do not use the tire pressure indicated on the tire itself as a guide.

Nitrogen In Tires - The Technical Side
The following benefits under controlled conditions are attributed to nitrogen gas and its unique properties:

• A reduction in the expected loss of tire pressure over time.
• A reduction in the variance of tire pressures with temperature changes due to reduction of water vapor concentration.
• A reduction of long term rubber degradation due to a decrease in oxygen concentrations.
• These are obtainable performance improvements when nitrogen is used to inflate tires under controlled conditions.
• Nitrogen inflation can provide some benefit by reducing gas migration (pressure loss) at the molecular level through the tire structure.
• NHTSA (National Highway Traffic Safety Admin.) has stated that the inflation pressure loss of tires can be up to 5% a month.
• Nitrogen molecules are larger than oxygen molecules and therefore are less prone to "seeping" through the tire casing. The actual obtainable benefits of nitrogen vary, based on the physical construction and the materials used in the manufacturing of the tire being inflated.
• Another potential benefit of nitrogen is the reduced oxidation of tire components. Research has demonstrated that oxygen consumed in the oxidation process of the tire primarily comes from the inflation media. Therefore, it is reasonable to assume that oxidation of tire components can be reduced if the tire is inflated with nitrogen. However, only very small amounts of oxygen are required to begin the normal oxidation process. Even slight contamination of the tire inflation gas with compressed atmospheric air during normal inflation pressure or maintenance, may negate the benefits of using nitrogen.
• Regardless of the inflation media for tires (compressed air or nitrogen), inflation pressure of tires is critical for overall tire, and ultimately, vehicle performance. Maintaining the correct inflation pressure allows the tire to perform as intended by the vehicle manufacturer in many areas including comfort, fuel economy, stopping distance, corning, traction, treadwear and noise. Since the load carrying capability of a tire is related to inflation pressure, proper inflation pressure maintenance is necessary for the tire to support the load imposed by the vehicle without excessive structural degradation.