Michelin 4×4 Diamaris 275/40 R20 106Y XL

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The Michelin 4×4 Diamaris is a top-of-the-line all-season tire that provides excellent traction and handling in all weather conditions. The Diamaris features an advanced tread pattern that provides excellent grip in both dry and wet conditions, and the tire’s unique construction provides a comfortable ride and superior durability. The 4×4 Diamaris is also designed to provide excellent traction in light snow and on icy roads. This tire is designed to be used in all conditions, including mud, snow, and ice.

What does 275/40R20 mean?


The tire width is 275mm.


The aspect ratio of the tire is 40. Aspect ratio is the relative height of tire sidewall. The number refers to the percentage of sidewall height in relation to tire width.


The letter in the middle refers to tire construction. Practically all tires sold for cars are radials.

Sometimes you also see tires with RF or ZR. RF indicates the tire is run flat, whereas ZR means the tire has speed rating higher than V. These tires are also radials, as the R indicates.


Rim diameter for the tire.

275/40R20 106Y tire size

The width of 275/40R20 106Y tire is stated in millimeters and sidewall height in percentages. In this table you’ll find out the 275/40R20 106Y tire size in inches as well as few additional metrics:

In inches In millimeters

Section Width

10.8″ 275mm

Sidewall height

4.3″ 110mm

Diameter / Height

28.7″ 728mm


90.0″ 2287mm

Rim Diameter



704 per mile 437 per kilometer

Rim Size for 275/40R20 106Y Tires

Recommended rim sizes for 275/40R20 106Y tire:

Diameter Width Range
20″ 9-11″

What does 106Y mean?

The load index 106 means that the tire has been designed to support 2094 lbs or 950 kg.

The speed index Y means that the tire has been designed to be used in speed up to 186 mph or 300 kph.

This size tire is usually used on high performance cars.


Michelin is a French tire company that was founded in 1889. Michelin is the second largest tire manufacturer in the world and the largest in Europe. Michelin produces tires for passenger cars, trucks, buses, motorcycles, and bicycles. Michelin also manufactures and sells tires for aircraft, agricultural, and other specialized vehicles. Michelin 4×4 Diamaris tires are designed for luxury SUVs. These tires offer excellent wet and dry traction, as well as a comfortable ride.

Tire Specification

Brand: Michelin
Model: 4x4 Diamaris
Season: Summer
Size: 275/40 R20
Load Index: 106 — 950 kg | x4 - 3800 kg
Speed Index: Y — 300 km\h
Car Type:SUV
Road: On/Off road
XL / Extra Load: Yes
RunFlat technology: No
Commercial / Reinforced: No
EU Label
Fuel efficiency: C
Wet grip: B
Noise level: 71dB