Michelin X Radial | 185R400 91S
Michelin X Radial | 185R400 91S Michelin X Radial | 185R400 91S Michelin X Radial | 185R400 91S
Tire Series X Radial
Brand Michelin
SKU 63189
Product Size 185R400 91S TT
Tire Construction Radial
Sidewall Style Blackwall
Radial Width 185 mm
Radial Aspect Ratio 85
Rim Diameter (in/mm) 400mm
Overall Diameter (in) 27.8
Section Width (in) 7.3
Rim Width (in) 5.00 - 6.50
Service Description 91S
Speed Rating S
Load Index 91
DOT Approved Yes
Tube Type or Tubeless Tube Type

Michelin X Radial | 185R400 91S



MICHELIN® X 185 R 400 X 91S TT

1949, Michelin set out to dominate the tire market with a considerable advance in technology. Its revolutionary radial construction of the Michelin X and later the Michelin X-Stop featured the special feature of separating the sidewall function from the crown function. The first major innovation from Michelin, the radial tire was first marketed as the "X" tire in 1949. The advantages of the radial Michelin X tire compared with the cross-ply tire could be clearly seen in all areas. Radial construction offered greater safety, grip and braking performance. Radials also proved economical to use, with double the wear mileage and a considerable reduction in fuel consumption. Drivers enjoyed increased comfort levels thanks to the flexibility of the sidewalls.

S Speed Rating

S Speed Rated: Up to 112 mph (180 km/h). Often required OE for higher performance trim level classic automobiles.

X Radial Tire Series

THE MICHELIN RADIAL REVOLUTION. The MICHELIN X tire has a revolutionary radial construction with the special feature of separating the sidewall function from the crown function.

  • The X Radial was a breakthrough in Radial technology and Michelin innovation
  • Radial technology: The advantages of the radial tire compared to the conventional tire can be seen in all areas:
  • Great safety: significantly improved road holding, grip and braking.
  • Economy in use: mileage efficiency doubled, significant reduction in fuel consumption.
  • Great comfort thanks to the flexibility of the sidewalls.

Michelin Brand Collector Vehicle 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.

Product Questions & Answers

(77) People thought this was helpful
what is the rim dia. in inches for michelin x stop 185R400 tires
By bill Semerod on March 19, 2018

This tire is not for use on a standard rim, but rather for a 400mm metric rim. 400mm translates to 15.748, but we do not recommend you try to mount these on a standard 15" rim or anything other than a 400mm rim.

Coker Tire Support on March 19, 2018
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