Michelin 631954 TRX-B Radial Tire 240/55VR390 89W Blackwall

The Michelin TRX-B 240/55VR390 is a high-performance radial tire specifically engineered for classic European sports cars and high-performance vehicles from the 1970s and 1980s. This authentic reproduction tire is built using the original TRX molds to maintain period-correct styling and performance characteristics for vintage vehicle enthusiasts.

Revolutionary TRX Technology:

Developed by Michelin in 1975, the TRX system revolutionized tire design through its unique metric sizing and specialized rim integration. The name TRX derives from "Tension Repartie" (distributed tension), referring to the tire's innovative construction that distributes stress more evenly throughout the casing. This design features a gradual casing curvature that eliminates the traditional "S" shaped flexing found in conventional tires, resulting in superior directional stability and exceptional handling at the limit.

Performance Features:

• Low-profile design delivers precise steering response and enhanced cornering stability
• W speed rating supports speeds up to 168 mph (270 km/h)
• Optimized contact patch provides remarkable grip and traction
• Advanced tread pattern reduces rolling noise for improved comfort
• Enhanced flexing zone delivers excellent ride quality
• Blackwall sidewall styling maintains authentic vintage appearance

Racing Heritage:

The Michelin TRX earned its reputation on the world's most demanding racing circuits, including Formula 1 competition with Renault and Prost, and World Rally Championship victories on legendary vehicles like the Audi Quattro, Peugeot 205 Turbo 16, and Renault R5 Turbo. This proven performance translates directly to exceptional road handling and safety.

Important Compatibility Note:

TRX tires require specialized TRX metric rims with 390mm diameter and cannot be mounted on standard wheels. The tire and rim work together as an integrated system, with the rim featuring a flatter, lower flange design that complements the tire's unique bead construction. This tire cannot accommodate inner tubes and must be used tubeless.

Specifications:

• Size: 240/55VR390
• Load Index: 89 (1,279 lbs maximum load capacity per tire)
• Speed Rating: W (up to 168 mph)
• Construction: Radial
• Sidewall: Blackwall
• Overall Diameter: 654mm (25.7 inches)
• Section Width: 239mm (9.4 inches)
• Rim Diameter: 390mm (15.35 inches)

These tires are manufactured in limited quantities using authentic molds, and future production availability is not guaranteed. Michelin's commitment to preserving automotive heritage ensures that classic car owners can maintain their vehicles with period-correct, high-performance tires that meet the exacting standards of original equipment specifications.