Toyo TOY Observe GSI-6 LS 225/60R17

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What 225/60R17 means

In the size 225/60R17, 225 is the section width in millimeters (8.86 in), 60 is the aspect ratio — the sidewall stands 60% as tall as the tire is wide, or 135.0 mm (5.31 in) — R denotes radial construction, and 17 is the wheel diameter in inches. That works out to an overall diameter of about 27.63 inches, turning roughly 730 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 99 — a maximum load of 1,709 lbs per tire. The speed symbol H corresponds to a maximum sustained speed of 130 mph.

Specifications

Frequently asked questions

Will 225/60R17 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 225/60R17, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 225/60R17 tire in stock to compare options.

What does 99H mean on the Toyo Observe GSI-6 LS?

99H breaks down as load index 99 — rated for 1,709 lbs per tire — with an H speed rating, good for a maximum sustained 130 mph.

What kind of tire is the Toyo Observe GSI-6 LS?

The Toyo Observe GSI-6 LS in 225/60R17 is a performance winter tire.

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