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  • Q1. What are the disadvantages of Over-inflation?

    • Prone to impact damages from external agents (objects).
    • Pronounced Center wear
    • Overall low tyre mileage
    • Vehicle handling issue
    • Uncomfortable ride
    • Low braking efficiency due to lower contact area
  • Q2. What are the disadvantages of under-inflation?

    • Premature Tyre failures
    • Safety concern
    • Overall low tyre mileage
    • Shoulder wear
    • More fuel consumption
    • Limiting retread possibility
    • Lower acceleration of vehicle
  • Q3. What is the ideal condition to check the tyre inflation pressure?

    Ans. When the tyres are in cold condition.
  • Q4. When the tyre is wearing out more from center compared to shoulders, what does it mean?

    Ans. Center wear: Tyre running in over-inflated condition
  • Q5. When the tyre is wearing out more from shoulders in compare to center, what does it mean?

    Ans. Shoulder wear: Tyre running in underinflated condition
  • Q6. In case of Dual Fitment sometimes one Tyre wears out faster than other why?

    • Improper inflation pressure maintenance in dual fitment
    • Improper matching of tyres in the dual assembly
    • Loose or Worn out bushings/suspension components
    • Alignment parameter not maintained.
  • Q7. Uneven wear in Steer axle, why?

    • Improper wheel alignment settings
    • Worn-out/loosen components
  • Q8. Reason for Feathered wear on Steer axle?

    • Incorrect Toe setting parameter leads to Toe in or Toe Out and this can lead to Feathered wear on steer axle.
    • Incorrect Inter axle alignment parameter can also cause feathering in steer axle
  • Q9. Front axle should have more pressure than rear axles or vice versa?

    Ans. Irrespective of axle, pressure recommendation is depends upon Load imparted on axle/tyre.
  • Q10. Which alignment setting is worse for tyre wear?

    Ans. Improper Toe setting in steer
  • Q11. What is the tyre pressure recommendations when changed over to Radial tyres from Bias.

    Ans. Suggested to maintain 10 psi higher inflation pressure in Radial Tyres as compared to Bias.
  • Q12. By fitting Radial tyres, can I carry more loads?

    Ans. Fitting Radial tyres in place of Bias tyres of same size, cannot increase the load carrying capacity.  Increase in Ply Rating or Load Index or Higher Size of tyre will enhance load carrying capacity.
  • Q13. Is the recommended tyre inflation pressure is same for new as well retreaded tyres?

    Ans. Tyre inflation pressures are to be maintained based on load per tyre and operating conditions.
  • Q14. Can I mix new and retread tyres on the same axle/Dual fitment?

    Ans. New and Retreaded Tyres of same size, ply rating / Load index, Overall Diameter, section width and similar tread pattern design can be mixed.
  • Q15. What are the measures to be taken to control excessive heat buildup in tyres?

    Ans. Maintain correct & recommended loads, maintain correct inflation pressure. Avoid over loading, over speeding & frequent acceleration and braking. Careful driving, Regular check, maintenance of suspension, axle and brake assembly will reduce the heat build up.
  • Q16. Should the tyre inflation pressure be kept same for extreme weather conditions?

    Ans. Yes. However, Pressure inside the tyre changes based on change in ambient temperature. Usage of Nitrogen can minimize temperature variation in extreme weather.
  • Q17. I have a mix up of bias and radial tyres in my multi axle vehicles, what could be the ideal fitment positions for bias and radial tyres?

    Ans. Preferably in such cases, Bias tyres should be fitted on Steer axle and radial tyres on rear axles. However, ideally all tyres should be either bias or radial. Never mix radial and bias on same axle.
  • Q18. How to identify the correct tubeless valves for my tubeless radial tyres?

    Ans. Tube Less Truck Tyre clamp in valves are identified with TR number codes such as "V3 – 20-6, TR 545 etc. These valve types are selected based on rim profile / rim type and Rim Valve hole dia. It is suggested to consult tyre manufacturer for details.
  • Q19. Can I use Bias tubes/flaps in Radial tyres and vice versa?

    Ans. Tubes and Flaps for a particular type construction of tyre designed and manufactured to have perfect fit in the respective tyre. Therefore the above interchangeable use of tubes & flaps not recommended.
  • Q20. How to differentiate between Radial and Bias tubes?

    Ans. Tubes for Radial tyres are to be marked / engraved as "R" in the size marking .Additionally the word "RADIAL" may also be marked / engraved.
  • Q21. Can we use retread tyres at the front axle at high speed vehicles?

    Ans. Generally retreaded tyres are used on the rear axle positions, primarily for safety reasons. If the retreaded casing strength , quality of repair and retread are ensured as good as new tyre or the retread tyre will meet required tyre safety aspect , then retreaded tyres can be used in front axle.
  • Q22. Why loading capacity of a truck tyre always mentioned as higher for single fitment and somewhat lower for dual fitment?

    Ans. Maximum specified loads for a tyre when fitted on single and fitted on dual are specified on the side walls. Recommended loads for dual fitments are lower than single fitments; this is in order to take care of load shifting during operations within the dual tyre assembly.
  • Q23. It is generally believed that if overloaded truck is kept in a standstill position its tyre will burst/fail is it true? Why?

    Ans. If vehicles in loaded conditions are kept stand still for long time imposing load on tyres, then tyres get deformed due to load, heat and other conditions. At times this condition mechanically disintegrates tyre components and then if vehicle is used with these conditions tyres tend to fail.
  • Q24. For the same size & load if we want to use the tyre on a higher gradient say 35 degree or 40degree in paver machine than it is safe to use or we have to go for tyres with higher loading capacity?

    Ans. Tyres are to be selected, fitted and maintained according to conditions such as, load per tyre, application and operating conditions. If vehicles are operated at high gradients, estimate load per tyre on those gradients and select proper tyre.
  • Q25. What is the maximum temperature a tyre can withstand in service after which it fails and how many Hrs it can withstand that temperature?

    Ans. Heat and temperature is the worst enemy for tyres. However, high ambient temperature, operating conditions increase tyre temperature very high. It is estimated for truck & bus tyres, temperature above 90 degree C on tyres will degrade tyre properties and result in tyre failure
  • Q26. Do Silica tyres have higher braking capacity than normal tyres?

    Ans. Silica in tyres is used in place of Carbon Black as reinforcing agent in Rubber for various reasons. Silica can improve braking in wet conditions. Vehicle stopping or braking distance or brake efficiency depends on various factors rather than Silica or Carbon Black, such as tread design, compound, operating surface and conditions, vehicle loads etc.
  • Q27. What is the maximum permissible OD difference for safe dual matching?

    Ans. Preferably the diameters of dual tyres should be identical. However, the suggested difference in dual tyre OD depends on Tyre size, application & use. For a 10.00-20 tyre size and for normal application permissible difference OD in dual assembly is 12 mm and higher OD tyre to be placed on out board of the dual assembly. Similarly for 10.00R20 permissible difference in OD in dual assembly is 6 mm.
  • Q28. How many kms a tube can run?

    Ans. If tyres and tubes are inflated, used and maintained properly as per the recommendations, then it is expected that life of tube should be same as that of tyre.
  • Q29. Are regroovable tyres safe for driving?

    Ans. Regrooved tyres are safe to use, if they are regrooved as per recommendations. Tyre manufactured with regrooving facility is marked on the side walls "REGROOVABLE ". Tyres manufactured without regrooving facility are not safe to regroove & use.
  • Q30. Up to what minimum air pressure a truck and a PCR tyre at normal load can work?

    Ans. Tyre pressures are to be maintained as per recommendations and load per tyre and operating conditions.
  • Q31. What is the importance and need of Wheel Rotation?

    Ans. Tyre rotation is the practice of moving the wheels and tyres of an automobile from one position to another, to ensure even tyre wear. Tyres at different position in a vehicle wear at different rate. Even tyre wear is desirable to extend the useful life of a set of tires.
  • Q32. What special care I should take while repair of the tyre?

    Ans. For proper repair, selection of the correct patch is very important as patches are different for bias and radial tyres. Match the marking towards bead for correct positioning and placement of the patch.
  • Q33. How much a tyre mileage gets impacted due to 1mm toe in/out?

    Ans. For every excessive 1 mm of toe-in or toe-out, the tyre wears at the rate of 7%.