Tire Testing Technology: Endurance, High-Speed, Strength, and Road Performance

A tire is a multi-material composite structure (tread, carcass, bead) that must withstand radial loads, lateral forces, driving torque, and braking forces under harsh conditions. This article covers the full range of tire testing: laboratory drum tests (endurance, high-speed, strength, bead unseating) and road tests (dry/wet braking, handling, noise, coast-down).

Keywords: tire testing; endurance test; high-speed tire test; tire strength test; bead unseating; wet braking; dry handling; tire safety test

1. Tire Endurance Test

Concept: A tire-rim assembly inflated to specified pressure is pressed against a rotating drum (simulated road) at constant speed, with load increased stepwise over time. The test evaluates heat resistance and fatigue durability.

Test conditions:

• PCR standard speed: 80 km/h; this comparison test used 120 km/h (50% more severe).
• Load progression: Stage 1 = 100% (4h), Stage 2 = 110% (5h), Stage 3 = 115% (24h), Stage 4 = 125% (10h), Stage 5 = 135% (10h), continuing to 150% load.
• Total cumulative test time: 120 hours.

Results (195/60R14 tires at 120 km/h):

Brand	Manufacturer	Speed (km/h)	Time (h)	Condition
Goodyear	Dalian	120	120	No failure
Michelin	Shenyang	120	120	No failure
Warrior	Shanghai	120	120	No failure
Hankook	Korea	120	120	No failure
Kumho	Korea	120	120	No failure

All five brands passed with no failure after 120 hours at 120 km/h — demonstrating good durability.

2. Tire High-Speed Performance Test

Concept: The tire is loaded against the drum at constant load, and speed is increased stepwise until failure. This evaluates heat resistance and fatigue at speed.

Test load: PCR radial tire = max load × 0.8; light truck = max load × 0.88.

Speed progression (H-rated example):

Stage	1	2	3	4	5	6
Speed (km/h)	0–170	170	180	190	200	210+
Time (min)	10	10	10	10	10	10

Results:

Brand	Passed Speed (km/h)	Failure Speed (km/h)	Failure Mode
Goodyear	260	270	Tread chunking (7.5 min at 270)
Michelin	260	270	Shoulder separation (5 min at 270)
Warrior	240	250	Shoulder separation (4.3 min at 250)
Hankook	240	250	Sidewall blowout (3 min at 250)
Kumho	210	220	Blowout (2 min at 220)

All five exceeded national standards. Goodyear and Michelin performed best (260 km/h passed); Kumho was weakest (failed at 220 km/h).

3. Tire Strength Test

Concept: A hemispherical steel probe of standard diameter is pressed into the tire tread at specified speed until failure (or reaching the rim). The minimum failure energy is recorded.

Method: Mount on standard rim, inflate, condition at 18–36°C for at least 3 hours, re-adjust pressure. Test at 5 equally spaced points around the circumference; press perpendicular to tread centerline on tread blocks (not grooves).

Failure energy formula: W = F × P / 2 (W in N·m, F in N, P in m penetration).

Results:

Brand	Failure Energy (J)	% of Standard	Condition at Point 5
Goodyear	576	195.2%	Not penetrated
Michelin	538	182.5%	Penetrated
Warrior	482	163.2%	Not penetrated
Hankook	529	179.2%	Penetrated
Kumho	438	148.3%	Penetrated

All exceeded the 140% standard. Goodyear was strongest; Kumho weakest.

4. Bead Unseating Resistance Test (Tubeless PCR)

Concept: A static lateral force is applied to push the bead inward off the rim flange. The maximum force required to unseat the bead is measured.

Why it matters: During cornering, centrifugal force can exceed the bead-rim seating force, causing the bead to displace inward and air pressure to drop rapidly — a serious safety hazard.

Results (average of 4 points):

Brand	Unseating Force (N)	Bead-Rim Condition
Goodyear	9,170	All 4 points sealed
Michelin	9,212	All 4 points sealed
Warrior	9,418	All 4 points sealed
Hankook	9,307	All 4 points sealed
Kumho	9,235	All 4 points sealed

All five brands exceeded national standard requirements with good safety margins.

5. Road Performance Tests: Big Three Comparison

A road test compared three premium tires on a BMW 325i (205/55 R16):

• Michelin Energy MXV8 — comfort-focused, low rolling resistance (“XSE Green Technology”)
• Goodyear Eagle NCT5 — sporty grip, “Tredcrown” technology, designed for Asian roads
• Bridgestone Turanza GR-80 — new launch, “AQ Multicell” double-layer tread that maintains performance after wear

Dry Braking (100–0 km/h)

Tire	Cold (35°C tread)	Hot (50°C tread)
Bridgestone	42.7 m (best)	41.9 m (best)
Michelin	44.5 m	43.7 m
Goodyear	48.1 m	45.2 m

Warm tires brake shorter — tire temperature matters for grip.

Dry Handling (Slalom)

Tire	Average Slalom Speed
Goodyear	62.1 km/h (best)
Bridgestone	60.5 km/h
Michelin	60.5 km/h

Goodyear’s sporty nature showed clearly in lateral grip.

Noise Test (80 km/h exterior)

Tire	Noise Level
Michelin	75.1 dB (quietest)
Bridgestone	75.9 dB
Goodyear	77.2 dB

Coast-Down (Rolling Resistance)

Coasting in neutral from 20 km/h to stop:

Tire	Coast-Down Distance
Goodyear	269 m (longest = lowest RR)
Michelin	227 m
Bridgestone	200 m

Wet Braking (60–0 km/h on water film)

Tire	Wet Braking Distance
Bridgestone	14.6 m (best)
Michelin	14.7 m
Goodyear	15.0 m

Wet Cornering

Tire	Wet Cornering Speed
Goodyear	55 km/h (best)
Michelin	50 km/h
Bridgestone	50 km/h

Summary

No single tire won every test — each had its strengths:

• Michelin MXV8: Quietest ride, best comfort, good wet braking — but longest dry braking distance.
• Goodyear NCT5: Best dry/wet handling and slalom, lowest rolling resistance — but noisiest and longest dry braking.
• Bridgestone GR-80: Best dry and wet braking, balanced overall — but shortest coast-down (higher RR).

High-speed testing is the most demanding laboratory test — endurance, strength, and bead unseating are relatively easy to pass, but high-speed performance exposes structural weaknesses. Tire selection should match vehicle and use case: “fit” matters more than simply “best.”

Source: Adapted from “Tire Testing Technology,” by Tan Du Talks Rubber.