Tire Testing
•Mechanical Tire plunger
• Unseat evaluation
• Footprint evaluation
•Laboratory Tire Analysis
• Measurement
• Dissection
• Analysis
•Tire endurance & high speed testing
• FMVSS 139, 109, 119 (NHTSA
Compliance Laboratory)
• Tire Oven Aging
• Infrared
• Thermocouple
•Tire Rolling Resistance
•SAE J-1269
•SAE J-2452
•ISO 28580
•ISO 18164
•GMW 14996
•Tire footprint
•Stresses
•Motions
•Energies
•Virtual wear studies
•Glass plate photography
Indoor Treadwear
• Laboratory Tread Wear
• “Mission Profile” Boundaries
• Maximum Load 15,500 N
• Maximum Lateral Force 13,300 N
• Slip Angle +- 5 Degrees
• Camber Angle +- 3 Degrees
• Tire Pressure 690 kPa
• CTWIST Machine
• Tread pattern topography
• Calculates wear rate
• Reveals uneven wear
Tire Reports
Laboratory Tire Analysis
• Contract basis
– Measurement, dissection, analysis
• Multi-client format
– Three reports with geographical focus
• North America
• Europe/Asia
• EGM
– Smithers TDS
The: “Smithers Tire Analysis Report”
Serving the tire industry since 1925
• Technical reports for technical people
• Client driven selection of tires for analysis
• Used for competitive benchmarking
and consumption forecasting
Force and Moment
•Tire force & moment testing (MTS Flat Trac III)
• High-Speed Force &
Moment to 250 km/hr
(155mph)
• Motorcycle - Light Truck
• Slip Angles to ±30°
• Cambers from -12°to
+45°
• Loads to 25kN (5600 lb)
OTR Tire Testing
• Rolling resistance
• Footprint evaluation
• Dimensional measurements
• Loaded Deflection 200,000 lbs
• Tire Profile
• Endurance Testing 35,000 lbs
• Burst testing
Modeling for Vehicle Dynamics
•SAE Road Loads Characterization
• Kz, Footprint shape
• Cleat Envelopment
• Low order Modes
• Geometry, Mass, Inertias
• Quasi-static Kx, Ky
• Dynamic cleat impact
Winter Proving Ground
Raco, Michigan (upper peninsula)
 •700 acres
Benefits
•Courses configured to customer
needs – traction, braking,
handling evaluations
•Daily reporting
•Surface expertise maximizes
operational days
•Available for client show days
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