LEAD FREE WHEEL WEIGHTS

MAINLINE AUTOMOTIVE PARTS CORP

3M Factory Test Results
Durability
Test NameTest ConditionsTN 2023 Result
Water Resistance40C immersion, 240 hoursPass
Thermal Cycle Resistance30C 2 hours, RT .5 hours, 100C 2 Pass
 hours, RT .5 hours 
Heat Resistance100C, 240 hoursPass
Accelerated WeatheringSAE J1960Pass
Chipping ResistanceGravelometer, #7 crushed gravelPass
 50g, -20C, 2kg/cm2, 90 degree 
High Pressure Car Wash 7MPa, 8.6Vmin, RT, distance 
Resistance20cm, 30s, 30 degree, patternPass
 width 7cm 
Chipping Resistance & Gravelometer, #7 crushed gravel 
Salt Spray50g, -20C, 2kg/cm2, 90 degreePass
 followed by 480 hours in NaCl fog 
Salt Spray X cut on face of part and 35C, 5%Pass
 NaCl fog 480 hours 
Copper-Accelerated Acetic72 hours in CuC12 fg/gal andPass
Acid Salt SprayCH3COOH (acetic acid) 5ml/gal fog 
Adhesion
Test NameTest ConditionsTN 2023 Result
Initial State20C, 24 hoursExceeds OEM Specifications
Heat Resistance100C, 240 hoursExceeds OEM Specifications
Water Resistance40C immersion, 480 hoursExceeds OEM Specifications
Humidity Resistance50C, RH 95%, 240 hoursExceeds OEM Specifications
Hot Strength100C, 3 hoursExceeds OEM Specifications
Cold Strength-30C 3 hoursExceeds OEM Specifications
Thermal Cycle Resistance-30C 2 hours, RT 5 hours, 100C 2Exceeds OEM Specifications
 hours, RT .5 hours, 10 cycles 
High Pressure Car Wash7MPa, 8.6Vmin, RT, distanceExceeds OEM Specifications
Resistance20cm, 30s, 30 degrees, 7cm in 
 pattern width 

Field Testing Results

  • 201 cars in the field, with parts being applied since August 2004
  • Average days in the field, 279 days, maximum is 477
  • Average miles driven 19,520 with maximum 26,526 miles 
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