![]() Type B: Higher resistance to internal heat generation on surfaces which are not particularly rough. Type B4: Compromise solution between abrasion resistance and average speed on rough surfaces. minimum TKPH (TMPH) Type A: Particularly resistant to cuts, tread tearing and abrasion at average speeds which are higher than those for A4 (above). Type A4: Particularly resistant to cuts, tread tearing and abrasion on very rough surfaces. Traction / Regular treadMichelin designation: The tread depth ‘SUPER, D1, D2’ is sometimes indicated on the sidewall tyre. The H/S ratio is approximately equal to 0.90.ĭIFFERENT EARTHMOVER MICHELIN TYRES TREAD ![]() The nominal section width is expressed in inches followed by the number 90.Example: 50/90 R 57Tyres for rigid trucks The H/S ratio is approximately equal to 0.65. The nominal section width is expressed in inches or in millimeters, followed by the number 65.Examples: 35/65 R 33, 750/65 R 25Tyres for large loaders, articulated trucks, etc… The H/S ratio is approximately equal to 0.80. The nominal section width is expressed in:Inches or fractions of an inchExamples: 8.25 R 15, 20.5 R 25orExamples: 59/80 R 63Tyres for rigid trucks, articulated dumpers, loaders, handling equipment, etc…The aspect ratio is not indicated in the size designation. The H/S ratio is approximately equal to 1. The nominal section width is expressed in inches with to decimal places.Examples: 18.00 R 33Tyres for rigid trucks, handling equipment, etc…The aspect ratio is not indicated in the size designation. Other series of tyres are also available: 95 series, 75 series, etc. There are several families of earthmover tyres, characterized by their aspect ratio H/S (ratio in % between the height of the sidewall H and the section width of the tyre S).H= standard section height - S= standard section width
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