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Tyre Ratings & Best Tyres for Road Use — With Real Vehicle Examples

1. Tyre Ratings: What to Look For These ratings appear on the tyre sidewall and help you judge quality, safety, and performance. Treadwear Rating This tells you how long a tyre is likely to last. The higher the number, the longer it should last. A treadwear of 400 means the tyre will last about 4 times longer than a baseline test tyre. Traction Rating This shows how well the tyre grips on wet roads. The grades are: AA (excellent), A (good), B (moderate), and C (poor). Temperature Rating This tells you how well the tyre resists heat. High heat resistance means the tyre won’t overheat and burst at high speeds. Grades: A (best), B, and C. Load Index This number shows how much weight one tyre can safely carry. You must match this to your vehicle's weight class. Speed Rating This tells you the maximum speed the tyre can handle safely. For example, H = 210 km/h, T = 190 km/h, etc. 2. Best Tyres for Personal Vehicles (By Model) a. Toyota Corolla / Honda Civic Recommended Tyre: Michelin Pr...
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Steps taken when replacing a Battery in a car.

 Some times the mechanic can be far and hardly accessed, by this can be done without Mechanics' help.

The following are some of the steps that you can follow;

  1. Open the car bonnet.
  2. Release the battery terminal clamps.
  3. Carefully remove the cables.
  4. Release the battery holding clamps. 
  5. Lift the battery from it's seat.
  6. Note the battery positioning.
  7. Identify the positive and negative cable positions.
  8. Connect the ground cable to the negative terminal of the battery.
  9. Connect the positive cable to the positive battery terminal.
  10. Fix hold down clamps tight the battery terminal adequately and smear petroleum jerry on the terminals. 
More on automotive batteries

automotive batteries

LOW – MAINTENANCE BATTERIES

These are available in: NS.40 – (36AH), NS.60 – (45AH), N.50 – (50AH), N.50.Z – (65AH), N.70.Z – (75AH), N.100 – (100AH), N.120 – (120AH), N.150 – (150AH) and N.200 – (200AH) Battery sizes; in either of these two (2) states/types; that is;

Dry Charge Batteries: These require a user to fill-up all battery cells with mixed acid of S.G.-1.25 before the first use and have a one (1) year recommended shelf-life (this may be extended by filling it and then charging it before use);

Wet Charge Pre-filled Batteries: These come pre-filled from the factory and are ready for immediate use without the need to top-up with mixed acid before the first use and have a six (6) months recommended shelf-life (this may be extended by charging it first before use);

Both of these Battery types require regular check-up by the user (preferably at every periodic engine servicing) and they may be required to regularly top-up with deionized water (never top-up with acid as this destroys the Battery and this would render your warranty void) depending on the pattern of usage.

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