Toyo Observe Gsi-6 245/55R18 Observe Gsi-6 HP
Toyo

Observe Gsi-6

245/55R18
Winter M+S
$164.40/tire $219.20
Set of 4: $657.60
Minimum order: 4 tires (sizes can be mixed) ? Selling in sets of 4 is how we keep our prices this low — and a matching set keeps your car balanced and safe.
Most drivers replace all four for even wear and handling.
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Specifications

Size245/55R18 Observe Gsi-6 HP
Width245 mm
Aspect ratio55
Rim diameterR18
Load index103
Speed ratingV
Load rangeSL
SeasonWinter
Tread depth11.2/32"
Weight32 lbs
Max pressure51 psi
Severe snow (3PMSF)No
Run-flatNo

About the Toyo Observe Gsi-6

Studless Winter High Performance Passenger Car/SUV and CUV tire. HP Construction for Sport Coupes and Sedans, LS Construction for SUV/CUV.

Features

* Directional tread design with staggered tread blocks* Serrated stability rib* Split offset shoulder blocks* 4 circumferential grooves* High density 3D sipes* Plow edge* Tapered shoulder wedge* Microbit technology in compound* Large inner blocks with sawtoothed edges* Snow claws - edges within the tread grooves* Tapered evacuation grooves* Unique 360 degree spiral edge sipe design* Shoulder lightning edge* Carries the Three-Peak Mountain Snowflake (3PMSF) symbol

Benefits

* Maximizes traction and handling while improving ride comfort by reducing road noise* Adds stability during highway driving or when changing lanes* Digs into deep snow and slush for better cold weather traction* Large outer blocks on the outside shoulder add stability to the tire as well as grabbing power in deep snow* Add lateral traction while cornering* Efficiently evacuate moisture from under the tire for better grip* Crushed walnut shells embedded in the tire tread compound dig and bite into the ice surface for improved traction* Add stability at highway speeds and add biting grip in deep snow and slush covered roads* Enhance traction in deep snow or slush* Quickly move the water or slush away from the center of the tire to reduce the risk of hydroplaning or getting caught in slushy rutted roads* Designed to improve traction while accelerating, cornering or braking* Adds lateral traction when cornering* Meets the USTMA required performance criteria for Use in Severe Snow Conditions

Understanding the 245/55R18 size

In the size code 245/55R18, 245 is the section width in millimetres (about 9.6"). 55 is the aspect ratio — the sidewall height is 55% of the width, or roughly 134.8 mm. R18 means radial construction on a 18-inch wheel, giving an approximate overall diameter of 28.6".

The load index 103 means each tire supports up to 1,929 lbs — about 7,716 lbs across a full set of four. The speed symbol V certifies the tire to 149 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 Gsi-6 is built for

The Toyo Observe Gsi-6 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 an M+S (mud and snow) marking for light winter service. Fitment category: Passenger Car, CAR, SUV/CUV, Performance, HP.

Price and value

At $164.40 per tire, a full set of four costs $657.60. That sits close to the average for the 29 tires we stock in this size.

Frequently asked questions

What does the tire size 245/55R18 mean?

245 is the section width in millimetres, 55 is the aspect ratio (sidewall height as a percentage of width, about 134.8 mm), and R18 indicates radial construction for a 18-inch wheel. Overall diameter is approximately 28.6 inches.

What are the load and speed ratings of the Toyo Observe Gsi-6 245/55R18?

Its load index of 103 allows up to 1,929 lbs per tire. Its speed rating of V is certified to 149 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 Gsi-6 245/55R18 tires cost?

A single tire is $164.40 and a set of four is $657.60.

Does the Observe Gsi-6 come in other sizes?

Yes — we stock 138 additional Observe Gsi-6 sizes besides 245/55R18. Fit only a size approved for your vehicle.

Other sizes of this model

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