225/70R19.5 vs 245/70R19.5 Commercial Tires: What Is the Difference?

225/70R19.5 and 245/70R19.5 commercial tires are common on medium-duty trucks, delivery vehicles, work trucks and compatible trailers. The sizes look similar, but they are not interchangeable without confirming wheel, clearance and vehicle requirements.

Understanding the Size Markings

In 225/70R19.5, 225 is the nominal section width in millimetres, 70 is the aspect ratio and 19.5 is the wheel diameter in inches. A 245/70R19.5 is nominally wider and normally has a larger overall diameter, although exact measurements vary by model.

Why You Cannot Choose by Appearance

A wider tire may affect clearance, dual spacing, gearing, speedometer reading and load capability. The vehicle manufacturer’s placard, wheel specification and current approved setup should be checked before changing sizes.

Boto BT926 Steer and All-Position Applications

The Boto BT926 is available through True North Tires in select 225/70R19.5 and 245/70R19.5 commercial sizes. Its rib-style design is intended for compatible steer or all-position applications where stability and even wear are priorities.

Boto BT957 Drive Traction

For powered axles, the Boto BT957 uses a more traction-focused drive pattern in compatible 19.5-inch sizes. Selecting the correct tread by axle position is just as important as choosing the correct printed size.

What Newfoundland Operators Should Confirm

• Original equipment tire size.
• Wheel width and diameter.
• Load index and ply rating.
• Dual-tire spacing where applicable.
• Steer, drive or trailer position.
• Clearance at full steering lock and suspension travel.

Never substitute 225/70R19.5 and 245/70R19.5 solely because one is in stock or priced lower.

Frequently Asked Questions

Is 245/70R19.5 always better than 225/70R19.5?

No. It is wider and generally larger, but suitability depends on the vehicle, wheel and required clearances.

Can Boto tires be used on a drive axle?

Use the appropriate model. The BT957 is the traction-oriented drive pattern, while the BT926 is aimed at compatible steer or all-position use.

Can you confirm fitment?

Provide the truck year, make, model, current tire size and axle position. Final compatibility should match vehicle and wheel specifications.

Get a Commercial Tire Quote in Newfoundland

True North Tires is Newfoundland owned and operated. We supply commercial tires for owner-operators, garages, contractors, trucking companies and fleets. Additional brands, tread patterns and sizes may be available beyond the products discussed here.

Visit TrueNorthTires.ca, email info@truenorthtires.ca, or call or text 709-714-1901 for current inventory, delivery options and fleet pricing.

Specifications, availability and performance vary by model and application. Always confirm tire size, load rating, wheel compatibility and intended axle position before ordering.