Toyo TOY Observe G3 ICE 245/70R17

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What 245/70R17 means

In the size 245/70R17, 245 is the section width in millimeters (9.65 in), 70 is the aspect ratio — the sidewall stands 70% as tall as the tire is wide, or 171.5 mm (6.75 in) — R denotes radial construction, and 17 is the wheel diameter in inches. That works out to an overall diameter of about 30.50 inches, turning roughly 661 revolutions per mile. Overall diameter is what matters for speedometer accuracy and clearance when you change sizes, so compare it — not just the width — against your current tire.

The manufacturer lists the overall diameter of this specific tire as 17 inches — when clearance is tight, go by the published figure rather than the nominal size math.

The service description on this tire decodes to a load index of 110 — a maximum load of 2,337 lbs per tire. The speed symbol T corresponds to a maximum sustained speed of 118 mph.

Specifications

Frequently asked questions

Will 245/70R17 tires fit my vehicle?

Check the size molded into your current tire's sidewall or the tire placard inside the driver's door jamb — if it reads 245/70R17, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 245/70R17 tire in stock to compare options.

What does 110T mean on the Toyo Observe G3 ICE?

110T breaks down as load index 110 — rated for 2,337 lbs per tire — with a T speed rating, good for a maximum sustained 118 mph.

What kind of tire is the Toyo Observe G3 ICE?

The Toyo Observe G3 ICE in 245/70R17 is a studdable winter tire.

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