GETTING THE RIGHT TYRE
- Proper selection of tyres for the vehicle is very important to ensure optimum and safe operation.
- Some of the critical factors to be considered for correct tyre selection are:
- Vehicle type & use (passenger or goods)
- Load carried and type of load (Load Index/PR)
- Speed and sustained operations (Speed Symbol)
- Type /Rim combination (Tyre Size and Rim Profile)
- Operating conditions (Type of Roads/Terrain)
- Tyre pattern design requirements based on the application
TYRE MOUNTING AND DISMOUNTING
- Ensure that the rim is correct for the tyre size to be fitted.
- Clean the wheel thoroughly to remove all contamination.
- Ensure that the wheel is not cracked, deformed, damaged or bent.
- Lubricate the tyre beads with an approved tyre lubricant.
- With the tyre on the rim, start the inflation, making sure that tyre beads are seated correctly on the rim seat.
- For safety reasons always use a new tube when fitting new tube type tyres.
- Tubeless tyres must be fitted on air tight rims.
- Before starting to remove, ensure that the tyre is completely deflated.
- Ensure that there is no danger of the tyre bursting due to damage, exposed plies, etc.
TYRE SAFETY WARNING
- Tyre mounting / demounting and changing can be dangerous and should be done by trained personnel using proper tools and procedures.
- Never mount or use damaged tyres/ rims.
- Explosion of tyre rim assembly can occur due to improper mounting, mis-application, improper inflation or overloading leading, to serious injuries or death.
- Never use inflammable substance in a tyre.
- Never use a tyre worn beyond the TWI.
- Observe posted speed limits
- Avoid fast starts, stops and turns.
- Avoid potholes and objects on the road.
- Do not run over curbs and hit the tyre against side railings, dividers and curbs.
- Do not spin the wheels.
- It is dangerous to neglect tyre damage.
- Do not overload tyres.
LOAD SPEED INDEX
Load Index: A numerical code or numerical number associated with the maximum load a tyre can carry at the speed indicated by its speed symbol under the specified service conditions.
Speed Symbol: Speed symbol is an alphabet that indicates the maximum speed at which a tyre can carry a load corresponding to its load index.
TYRE VISUAL INSPECTION
- Pneumatic tyres having the following conditions are considered unsafe for use:
- Tyre body fabric/belts/plies exposed by wear, by injury, road hazards, damage, abrasions or scoring, etc.
- Tyres having incipient failures by local deformation, bulging, swelling etc.
- Pneumatic tyre which has been patched or repaired improperly or use of gaiter other than proper repair and vulcanization.
- Tyre worn beyond tread wear indicator, having signs of severe, uneven, mis-alignment, patchy wear.
- Broken cord or flat due to puncture, damage in bead area, damaged inner liner of tubeless tyre.