Tool compares diameter on dual-mated tires
Innovative Products of America’s Tire Comparator (Type II) provides an easy method of ensuring that mated tires are within tolerance, helping to ensure better fuel economy and longer tread life, officials say. To use the tool, fleet professionals can hold it against the tire and slide it across the tread for a pass/fail result.

Innovative Products of America's Tire Comparator (Type II) provides an easy method of ensuring that mated tires are within tolerance, company officials say.
WOODSTOCK, N.Y. — Innovative Products of America Inc.’s (IPA) Tire Comparator (Type II) is a consistent caliper for comparing tire diameter on dual-mated tires.
Officials said the company launched the comparator to help ensure the greatest fuel economy and tire life possible to help tire dealers and fleet professionals reduce costs.
Even the smallest discrepancies in mated tires can result in a loss of fuel economy and tread life, according to IPA. A fourth-inch variance in size, for example, will cause the larger tire to support a far greater load, which results in accelerated tread wear and increased heating on the larger tire. In addition, repeated scuffing will occur on the smaller tire with each rotation. These factors increase rolling resistance, which decreases fuel economy and reduces tire lifespan.
The Tire Comparator (Type II) provides an easy method of ensuring mated tires are within tolerance. The sliding tolerance gauge requires no measuring, guessing or visual inspection. To use it, it should be held against the tire, and then slid across the treads for a quick pass/fail result.
The comparator is made in the U.S. from a lightweight, durable aluminum construction. Special tread wear adapter gauges are also available for any rim size, making Tire Comparator (Type II) compatible with all dual-mated tires, according to IPA.
For more information about the tool, click here.
More Maintenance

BendPak Launches Ranger DST30PX Wheel Balancer
BendPak's new wheel balancer handles tires up to 43 inches in diameter, with a reinforced design, precise weight placement, and faster service cycles.
Read More →
Tips for Ensuring School Bus Garages Are Safe and Warm Year-Round
Cold maintenance bays and rising heating costs? Learn how school bus garages can improve comfort with targeted heating, better airflow, and winter preparation.
Read More →
ASE Highlights School Bus Technician Certification Requirements
ASE is encouraging school bus maintenance professionals to maintain their certifications, highlighting seven specialized tests and five-year renewal requirements.
Read More →
International Adds E-Commerce Capabilities to Fleetrite.com
IC Bus customers can now browse, buy, and track shipments for more than 400,000 aftermarket parts online.
Read More →
The Most Expensive Thing You Do Before Selling a School Bus: Wait
When should you sell an aging school bus? Learn how maintenance, mileage, corrosion, specifications, and timing can affect resale value long before the auction.
Read More →
The Evolution of DEF Header Technology: What School Bus Operations Should Know at Replacement Time
See what school bus fleets should consider when replacing DEF headers to improve reliability, reduce repeat repairs, and control maintenance costs.
Read More →
The Essential Guide to School Bus Maintenance and Student Safety
Your district's buses carry students to school every day. This guide shows how predictive maintenance powered by fleet data helps keep buses reliable, drivers accountable and students safer from the first bell to the last stop.
Read More →
Kerry Brothers Grows Michigan School Bus Repair Network
The acquisition of Downriver Truck and Bus expands Kerry Brothers’ school bus maintenance footprint across southeast Michigan, adding repair capacity, diagnostic resources, and state inspection support.
Read More →
Noregon Introduces CAN Bus Diagnostic Tool, Expands JPRO Features
CAN Mentor and the latest JPRO update aim to simplify vehicle network diagnostics and improve repair efficiency for technicians of all experience levels.
Read More →Cummins on Smarter, Simpler Engine Innovation
Cummins discusses its first-ever gasoline engine for school buses, EPA 2027, and why bus fleets still want durable, simpler internal combustion options.
Read More →
