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Compression Rim Grooving-An Objective Measurement Technique
By
Troy Cottles
Presented at the HIFI Tire Tech Conference, Houston, TX
August 13, 2010
Compression Rim Grooving
Background:
 Prior
studies

Methodology

Subjectivity

Precision
Compression Rim Grooving
Background:
 Objective
Measurement Technique:
Compression Rim Grooving
Background:
 Test
Protocol:
Inflation Pressure:
Load:
Rim:
Speed:
Duration:
CONTROL REDUCED-INFLATION
30 PSI
21 PSI
890 lbs
890 lbs
14 X 5.5 14 X 5.5
75 mph
75 mph
40,000 miles
40, 000 miles
Compression Rim Grooving
Background:
 Test Tires:
 Yokohama Aspec A300, H-rated, FD3505

Bridgestone B700AQ, T-rated, 2R3605

Dunlop Sp Sport LM701, H-rated, EU4005

Dayton Quadra SE, S-rated, HY2105

Firestone FR690, S-rated, W22805

Uniroyal Tiger Paw, S-rated, K41605

Hankook Radial H714, S-rated, 1G1405

Michelin Symmetry, S-rated, HN1204

Toyo Spectrum, S-rated, 9T5004

Federal Supersteel 735, T-rated, 2E4905
Compression Rim Grooving
Control Tires:
 New
Tire Photos-Tire #28 Uniroyal Tiger Paw
Compression Rim Grooving
Control Tires:
 New
Tire Laser Profile-Tire #28 Uniroyal Tiger Paw
Compression Rim Grooving
Control Tires:
 Tire
Photos After Test-Tire #28 Uniroyal Tiger Paw
Compression Rim Grooving
Control Tires:
 Laser
Overlays-Tire #28 Uniroyal Tiger Paw
Compression Rim Grooving
Conclusions:
Tire designers calculate bead compression
values when tires are being designed and
developed. Without bead compression the tire
would not fit properly to the rim, possibly lose
air, slip on the rim or de-bead.
 Previous studies have concluded that rim
grooves are produced by under-inflated
operation.
 This study demonstrates that rim grooves can be
