Tyre and Tube Storage

Tyres

Ideally, new tyres and tubes should be stored in a cool, dry place out of direct sunlight. Temperatures should be between 32F (0C) and 85F (30C). Particular care should be taken to store tyres away from fluorescent lights, electric motors, battery chargers, electric welding equipment, electric generators and similar equipment. These items create ozone, which has a deteriorating effect on rubber.

Care should be taken that tyres do not come in contact with oil, gasoline, jet fuel, hydraulic fluids or similar hydrocarbons. Rubber is attacked by these in varying degrees. Be particularly careful not to stand or lay tyres on floors that are covered with these contaminants.

All tyres and tubes should be inspected immediately upon receipt for shipping and handling damage. Whenever possible, tyres should be stored vertically on tyre racks. The surface of the tyre rack against which the weight of the tyre rests should be flat and wide to minimize distortion.

Axial (circumferential) rotation of unmounted, vertically stored tyres should not be required. With respect to the effect of storage time on rotation, we strongly suggest the use of first-in first-out (FIFO) storage. This helps to avoid storage-related field issues.

Stacking of most tyres is permissible; however, care must be used to prevent distortion of the tyres on the bottom of the stack. To prevent chine distortion, stacking chine tyres is not recommended. Tyres stored in racks, but leaning on the chine, can also cause distortion.

Tubes

Tubes should be stored in their original cartons whenever possible. If stored without their cartons, they should be lightly lubricated with talc powder and wrapped in heavy paper.

Tubes can also be stored in matching tyres. Tyres should be clean and lightly lubricated with talc with tubes inflated just enough to round them out.

Under no circumstances should tubes be hung over nails, pegs or any object that might form a crease in the tube. Such a crease will eventually produce a crack in the rubber.

Tyre and Tube Age Limit

Age is not an indicator of tyre serviceability. Diamond motorcycle/ bicycle/ rickshaw/ wheel-barrow tyres or tubes have no expiration date as long as all service criteria, visual criteria, or individual customer-imposed restrictions are met.

It is recommended that tubes not be reused; they can grow as much as 25% in service. Reusing them can result in folded, pinched tubes which can fail or create an imbalance.

Storage of Mounted Assemblies

Set the pressure at operational pressure for the desired tyre if allowed by the OEM. The assemblies can be stored like this for up to 12 months. After that time, inflated assemblies that have not been used should be re-inspected to tyre appearance criteria. These re-inspections can be performed multiple times as long as the tyre meets all inspection and inflation criteria. However, to obtain optimum service from the tyre, it is recommended to rotate inventory on a first-in-first-out (FIFO) basis.

If the tyre does not meet the inspection and inflation criteria, the tyre should be treated as scrapped depending on the tyres condition. For assemblies stored for extended periods of time, inflation pressure retention checks should be performed to help re-verify the airworthiness of the assembly.
These recommendations do not supersede local storage facility regulations, ground transportation restrictions, or prevailing OEM requirements. Depending on OEM regulations, it may be the operators responsibility or the tyre handler (shipping or storage)s responsibility to ensure compliance with the requirements for the locations in which they operate, transport, and store mounted tyre assemblies.

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