Roadmaster RM170 245/70R19.50

The Roadmaster RM170 in 245/70R19 ships free from ThreePiece.us, with Affirm financing available at checkout and fast delivery from a nationwide warehouse network.

What 245/70R19 means

In the size 245/70R19, 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 19 is the wheel diameter in inches. That works out to an overall diameter of about 32.50 inches, turning roughly 620 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 service description on this tire decodes to a load index of 136 — a maximum load of 4,938 lbs per tire. The speed symbol M corresponds to a maximum sustained speed of 81 mph.

Specifications

Frequently asked questions

What does 136M mean on the Roadmaster RM170?

136M breaks down as load index 136 — rated for 4,938 lbs per tire — with an M speed rating, good for a maximum sustained 81 mph.

Will 245/70R19 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 245/70R19, this tire matches your vehicle's fitment. If you're changing sizes, compare overall diameter to keep your speedometer and clearances right. See every 245/70R19 tire in stock to compare options.

How fast does this tire ship?

Every order at ThreePiece.us ships free, with fast delivery from a nationwide warehouse network. Affirm financing is available at checkout.

Keep shopping

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