Toyo

Observe G3-Ice

Name: Toyo Observe G3-Ice 255/55R18 XL
Brand: Toyo
SKU: 139090
Price: 109.40 USD
Availability: InStock

255/55R18 XL

Winter 3PMSF M+S

$109.40/tire $145.86

Set of 4: $437.60

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Specifications

Size	255/55R18 XL Observe G3-Ice (Studdable)
Width	255 mm
Aspect ratio	55
Rim diameter	R18
Load index	109
Speed rating	T
Load range	XL

Season	Winter
Tread depth	12/32"
Weight	34.2 lbs
Max pressure	50 psi
Severe snow (3PMSF)	Yes
Run-flat	No

About the Toyo Observe G3-Ice

Studdable Winter Passenger Car, SUV and CUV tire.

Features

* Softer, high-silica compound* Optimized stud hole placement* Large u-shaped tread blocks with saw-tooth edge* Gear edge design at stud hole* Microbit technology* High density 3D multi-wave sipes* Carries the Three-Peak Mountain Snowflake (3PMSF) symbol* Toyo Tires' limited warranty

Benefits

* Ensures tread blocks remain flexible in lower temperatures and enhances wet braking and handling even in lower temperatures* Improves road contact and traction with fewer studs* Reduces noise for a quieter ride* Grab onto the snow for better traction and braking* Provides better traction during cornering and braking* Improves traction as ground walnut shells dig and bite into the snow and ice* Environmentally-friendly natural material* Increases tread block rigidity for better ice traction* Improves traction on ice and compact snow during cornering, braking and acceleration* Meets the required performance criteria for Use in Severe Snow Conditions

Understanding the 255/55R18 XL size

In the size code 255/55R18, 255 is the section width in millimetres (about 10"). 55 is the aspect ratio — the sidewall height is 55% of the width, or roughly 140.3 mm. R18 means radial construction on a 18-inch wheel, giving an approximate overall diameter of 29".

The load index 109 means each tire supports up to 2,271 lbs — about 9,084 lbs across a full set of four. The speed symbol T certifies the tire to 118 mph under its rated load. Always match or exceed the load index and speed rating listed on your vehicle's door-jamb placard.

What the Toyo Observe G3-Ice is built for

The Toyo Observe G3-Ice is a winter tire, using a cold-weather compound that stays pliable below 45°F (7°C) where all-season rubber hardens and loses grip. It carries the three-peak mountain snowflake (3PMSF) symbol, meaning it passed a standardised severe-snow traction test. Fitment category: Passenger Car, CAR, SUV/CUV.

Price and value

At $109.40 per tire, a full set of four costs $437.60. That is about 42% below the average price of the 83 tires we stock in this size.

Frequently asked questions

What does the tire size 255/55R18 mean?

255 is the section width in millimetres, 55 is the aspect ratio (sidewall height as a percentage of width, about 140.3 mm), and R18 indicates radial construction for a 18-inch wheel. Overall diameter is approximately 29 inches.

What are the load and speed ratings of the Toyo Observe G3-Ice 255/55R18 XL?

Its load index of 109 allows up to 2,271 lbs per tire. Its speed rating of T is certified to 118 mph. Check your door-jamb placard and do not fit a tire rated below the vehicle's requirement.

How much does a set of 4 Toyo Observe G3-Ice 255/55R18 XL tires cost?

A single tire is $109.40 and a set of four is $437.60.

Is the Toyo Observe G3-Ice rated for snow?

Yes. It carries the three-peak mountain snowflake (3PMSF) symbol, meaning it met a standardised severe snow traction test and is built as a dedicated winter tire.

Does the Observe G3-Ice come in other sizes?

Yes — we stock 170 additional Observe G3-Ice sizes besides 255/55R18 XL. Fit only a size approved for your vehicle.