185/70VR15 89V TL XWX Blackwall Tire
The only radial tire which could be fitted on the fastest cars in the world in the 1970s, the Michelin XWX gives these high speed vehicles outstanding road holding ability and remarkable grip. Michelin XWX tires featured construction designed to reach an incredible 186 mph top speed. The special features of the XWX result in remarkable performance, combining speed, driving pleasure and safety. The original design of its internal construction, together with its flexible carcass give exceptional comfort when traveling at very high speeds. Being a VR category tire, the XWX can be used at speeds in excess of 210 kph (131 mph) ; with a maximum speed of 270 kph (155 to 186 mph). At the end of the 1960s, Germany and Italy were the leaders in the European motorway development program and were also the main producers of cars which could reach speeds in excess of 200 km/h, (124 mph). The wide asphalt strips and the absence of speed limits offered a privileged few the opportunity to make full use of the performance of these "super-cars" at speeds which would be unthinkable today. The Lamborghini Miura (1966), Ferrari 365 (1965), Maserati Ghilbi (1966) ; de Tomaso Pantera (1970) and Porsche 911 Carrera RS (1972) were the undisputed stars, but the large German saloons like the Mercedes 300 SE 6,31 (1968) and BMW 3.0 SI (1971) also made a strong impression. The French were also in the high speed game with the Citroen SM (1970) as were the British with the legendary Jaguar V12 E-Type (1970) and Aston Martin DBS (1967).Popular on: 1961-1970 Volvo P1800, 185/70 HR15 89HPopular on: 1973-1989 Porsche 911, 185/70 VR15 89W (F+R), 215/60 VR15 94W (R)
Blackwall Tire
Since the introduction of carbon black rocked the tire industry, the original recipe for most tires has been a solid black sidewall. For classics and collector cars alike, it's hard to beat the no-nonsense appeal of a classic blackwall style tire. British sports car, classic truck and even hot rod enthusiasts love the way a nice period correct blackwall tire looks on their vehicles.
V Speed Rating
V Speed Rated: Up to 149 mph (240 km/h). Often required OE for higher performance trim level automobiles.
Michelin XWX
The tire for 70s supercars with fitments for BMW, Porsche, Mercedes, Jaguar, Cadillac Seville and others. The special architecture of the XWX ensures it delivers high performance that combines speed, driving pleasure and safety.
Michelin Brand Classic Tires
Michelin is known for its high quality tires, and we keep thousands of popular Michelin tires in stock every day. Our Michelin product offerings include fitments from the 1920's all the way into the 2000's, with an intense focus on classic sports cars. Build quality, fitment options and period correct styling makes the Michelin product line a favorite among sports car enthusiasts around the world.
Please Note
- Tire mounted on wheel for demonstration purposes only. Wheel and other accessories are not included. Please note that dimensions listed (tread width, section width and overall diameter) are non-scientific and based on an inflated tire, mounted to a wheel. Dimensions may vary due to rim width and inflation pressure. Please note Chemical Guys Tire and Rubber Cleaner and Adams Polish Tire shine has been linked to Whitewall browning and should not be used. We recommend using our line of tire care products.
| SKU | 57970 |
|---|---|
| Weight | 20.000000 |
| GTIN | 08669968355 |
| Availability Date | 2026-08-17T00:00:00Z |
| Brand | Michelin |
| Tire Series | Michelin XWX |
| Product Size | 185/70VR15 89V TL |
| Sidewall Style | Blackwall |
| Rim Diameter | 15 inch |
| Overall Diameter (IN) | 25.5 |
| Section Width (IN) | 7.7 |
| Width Radial | 185 mm |
| Radial Aspect Ratio | 70 |
| Rim Width (in) | 5.00 - 6.50 |
| Tire Construction | Radial |
| Tube Type or Tubeless | Tubeless |
| DOT Approved | Yes |
| Service Description | 89V |
| Load Index | 89 |
| Speed Rating | V |
This Michelin XWX | 185/70VR15 comes in the 185/70R15 size, suitable for the classic and collector vehicles listed below.
About the 185/70R15 Tire Size
The 185/70R15 tire size is associated with select 1969 through 1986 vehicle applications, including Porsche 911, Porsche 924, and Mazda RX-7 models. This Michelin XWX is a radial tire in the 185/70R15 size, making it relevant to shoppers looking at period-correct applications tied to this fitment range. For more detailed information on this tire size, explore the 185/70R15 tire on Coker Tire Fitment Guide.
Vehicle Fitment for the Michelin XWX | 185/70VR15
The Michelin XWX | 185/70VR15 is available in a tire size associated with a range of classic and collector vehicles. The vehicle applications below are organized by year, make, and model to help identify vehicles associated with the 185/70R15 size. Explore the linked Make & Model and Year Make & Model pages for more detailed fitment information.
Fitment information should be verified for the specific vehicle before purchase. Confirm tire size, wheel fit, load requirements, overall diameter, and available clearance.
1966–19701 make · 2 fitments
The 1966–1970 period includes 185/70R15 applications for Porsche. These applications are focused on the Porsche 911 within this year range.
Porsche
Porsche applications in this period include the 911.
1971–19751 make · 5 fitments
The 1971–1975 period includes 185/70R15 applications for Porsche. These applications continue to center on the Porsche 911 during these model years.
Porsche
Porsche applications in this period include the 911.
1976–19802 makes · 7 fitments
The 1976–1980 period includes 185/70R15 applications spanning Mazda and Porsche. This range covers multiple applications, with Porsche 911 joined by Mazda RX-7 and Porsche 924 listings.
Mazda
Mazda applications in this period include the RX-7.
Porsche
Porsche applications in this period include the 911 and 924.
1981–19851 make · 8 fitments
The 1981–1985 period includes a concentrated group of 185/70R15 applications for Porsche. Applications in this range cover both the Porsche 911 and Porsche 924.
Porsche
Porsche applications in this period include the 911 and 924.
1986–19901 make · 1 fitment
The 1986–1990 period includes a 185/70R15 application for Porsche. This listing is represented by the Porsche 911 within the range.
Porsche
Porsche applications in this period include the 911.
Frequently Asked Questions
Fitment & Compatibility â–¼
Will the Michelin XWX 185/70VR15 89V TL fit vehicles originally equipped with bias ply sizes like 640-15 â–¼
The Michelin XWX 185/70VR15 is listed as a radial alternative to bias ply sizes such as 640-15 and C78-15. The overall diameter and width closely match those legacy sizes, making it a suitable upgrade for improved drivability.
Radial construction introduces a flatter contact patch and more consistent road grip compared to bias ply designs. However, switching from bias ply to radial can slightly alter steering feel and suspension response. Alignment settings may require adjustment to optimize performance with radial construction.
Tire Size Equivalents & Conversions â–¼
What bias ply sizes correspond to the Michelin XWX 185/70VR15 89V TL â–¼
The Michelin XWX 185/70VR15 corresponds to bias ply sizes such as 640-15, 685-15, and C78-15. These equivalents are based on similar overall diameter and width characteristics.
Switching to radial construction improves stability, reduces rolling resistance, and enhances highway comfort. However, the visual sidewall profile may differ slightly from bias ply tires, which can affect authenticity for concours restorations.
Performance & Use Case â–¼
How does the Michelin XWX 185/70VR15 89V TL handle cornering and grip â–¼
The Michelin XWX 185/70VR15 provides strong grip due to its radial design and wider contact patch. The 70-series sidewall allows controlled flex, which contributes to predictable cornering behavior.
Compared to bias ply tires, cornering stability is significantly improved. The tire maintains consistent contact with the road surface, which enhances driver confidence during spirited driving.
How does the Michelin XWX 185/70VR15 89V TL perform in wet conditions â–¼
The Michelin XWX 185/70VR15 provides reliable wet traction due to its radial design and tread pattern. The contact patch helps channel water effectively, reducing the risk of hydroplaning.
Performance in wet conditions depends on tread depth and inflation. Maintaining proper tire pressure ensures consistent grip and braking performance in rainy environments.
Is the Michelin XWX 185/70VR15 89V TL appropriate for performance driving â–¼
The Michelin XWX 185/70VR15 was originally designed for high-performance vehicles of the 1970s, making it suitable for spirited driving within period-correct expectations. The V speed rating supports high-speed capability.
Modern ultra-performance standards may exceed the capabilities of this tire, but for classic performance driving, it delivers balanced handling and stability. It remains ideal for vintage sports car applications.
Construction, Durability & Load Capacity â–¼
What does the radial construction of the Michelin XWX 185/70VR15 89V TL mean for durability â–¼
The radial construction of the Michelin XWX 185/70VR15 improves durability by allowing the tread to remain more stable during operation. This reduces uneven wear and enhances tread life.
The flexible sidewall absorbs road impacts more effectively, which reduces stress on internal components. This design supports consistent performance over extended use.
How does the Michelin XWX 185/70VR15 perform under varying inflation pressures â–¼
The Michelin XWX 185/70VR15 is sensitive to inflation pressure changes. Proper pressure ensures even tread wear and optimal contact patch performance.
Underinflation can cause excessive sidewall flex and heat buildup, while overinflation reduces grip. Regular pressure checks are important for consistent performance.
Installation & Maintenance â–¼
How should the Michelin XWX 185/70VR15 be inflated for optimal performance â–¼
Inflation pressure should be set according to vehicle manufacturer recommendations. Proper pressure ensures balanced handling and tread wear.
Regular pressure checks help maintain performance and prevent uneven wear. Adjustments may be needed based on driving conditions.
What maintenance practices maximize lifespan of the Michelin XWX 185/70VR15 â–¼
Regular inspections, proper inflation, and alignment checks are essential for maximizing lifespan. Monitoring tread wear helps identify issues early.
Maintaining balanced driving habits reduces stress on the tire. Proper care ensures consistent performance and durability over time.
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