Fleet Maintenance - 20

for 16 percent of the rolling resistance contribution on a 6x4 tractor-trailer combination vehicle.
The drive tires and the trailer tires both make up
42 percent of the rolling resistance contribution
each. "If a user was going to try LRR tires on a
given wheel position, it would be drive or trailer
positions because they offer the [greatest] fuel
efficiency benefit," Mosier advises.
"Typically, trailer tires have ribbed designs that
are lower in tread depth, which contributes to lower
rolling resistance in this position," Bridgestone's
Nayakwadi adds. "In addition, fuel-efficient trailer
tires are designed with specialized compounds in
the sidewall and bead area, which also contributes
to [improved] rolling resistance."
A durable casing is an important consideration for trailer tires, Meisenholder notes. This is
because the trailer tire is retreaded more often
than tires at any other wheel position.
"No matter the wheel position, a number of
factors affect rolling resistance, including fleet
type, load, speed, tread pattern, and tire design,"
Nayakwadi says. "To help limit rolling resistance,
fleets should always select the best tires for the

Rolling Resistance Contribution by Axle

job at each wheel position and proactively maintain them. Proactive maintenance extends the life
of the tire, decreases downtime, and ultimately
maximizes a fleet's return on investment on its
tire assets."

Conclusion

»»As far as location on the vehicle, the U.S.
EPA greenhouse gas model notes steer
tires account for 16 percent of the rolling
resistance contribution on a 6x4 tractortrailer combination vehicle. The drive tires
and the trailer tires both makeup 42 percent
of the rolling resistance contribution each.
Image courtesy of Michelin North America

When it comes to the U.S. EPA's Phase 2 GHG regulations, tires will play an integral role in reducing
emissions and lowering fuel consumption.

As fleets continue to purchase late-model equipment in order to stay compliant with the Phase 2

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Fleet Maintenance

Table of Contents for the Digital Edition of Fleet Maintenance

Vehicles: What's Next in Federal Vehicle Emissions Standards?
In the Bay: Technician Tool Support
Shop Operations: State of the Industry
Taking the Extra Step to Prevent Wheel-offs
Planning Ahead for Vehicle Cybersecurity Threats
Management: How Do You Know When to Replace a Vehicle?
Economic Outlook: Won't Get Fooled Again
Letter from the Editor: Real-world Views on Parts, Service, and Operations
Tools & Equipment
Classifieds
Guest Editorial: Moisture in Trailer Brakes is Not Just a Nuisance
Hand & Specialty Tools Supplement
Specialty Hand Tools: The Problem Solvers
Time to Multitask
Get a Hold on Hand Tool Safety
Electric Vehicle Tool Set
Tool Review
Products
Fleet Maintenance - 1
Fleet Maintenance - 2
Fleet Maintenance - 3
Fleet Maintenance - 4
Fleet Maintenance - 5
Fleet Maintenance - 6
Fleet Maintenance - 7
Fleet Maintenance - 8
Fleet Maintenance - 9
Fleet Maintenance - Vehicles: What's Next in Federal Vehicle Emissions Standards?
Fleet Maintenance - 11
Fleet Maintenance - 12
Fleet Maintenance - 13
Fleet Maintenance - 14
Fleet Maintenance - 15
Fleet Maintenance - 16
Fleet Maintenance - 17
Fleet Maintenance - 18
Fleet Maintenance - 19
Fleet Maintenance - 20
Fleet Maintenance - 21
Fleet Maintenance - 22
Fleet Maintenance - 23
Fleet Maintenance - 24
Fleet Maintenance - 25
Fleet Maintenance - In the Bay: Technician Tool Support
Fleet Maintenance - 27
Fleet Maintenance - 28
Fleet Maintenance - 29
Fleet Maintenance - Shop Operations: State of the Industry
Fleet Maintenance - 31
Fleet Maintenance - 32
Fleet Maintenance - 33
Fleet Maintenance - 34
Fleet Maintenance - 35
Fleet Maintenance - 36
Fleet Maintenance - 37
Fleet Maintenance - Taking the Extra Step to Prevent Wheel-offs
Fleet Maintenance - 39
Fleet Maintenance - Planning Ahead for Vehicle Cybersecurity Threats
Fleet Maintenance - 41
Fleet Maintenance - 42
Fleet Maintenance - 43
Fleet Maintenance - Management: How Do You Know When to Replace a Vehicle?
Fleet Maintenance - 45
Fleet Maintenance - Economic Outlook: Won't Get Fooled Again
Fleet Maintenance - 47
Fleet Maintenance - Letter from the Editor: Real-world Views on Parts, Service, and Operations
Fleet Maintenance - 49
Fleet Maintenance - 50
Fleet Maintenance - Tools & Equipment
Fleet Maintenance - 52
Fleet Maintenance - Classifieds
Fleet Maintenance - Guest Editorial: Moisture in Trailer Brakes is Not Just a Nuisance
Fleet Maintenance - 55
Fleet Maintenance - 56
Fleet Maintenance - Hand & Specialty Tools Supplement
Fleet Maintenance - A2
Fleet Maintenance - Specialty Hand Tools: The Problem Solvers
Fleet Maintenance - A4
Fleet Maintenance - Time to Multitask
Fleet Maintenance - A6
Fleet Maintenance - Get a Hold on Hand Tool Safety
Fleet Maintenance - A8
Fleet Maintenance - Electric Vehicle Tool Set
Fleet Maintenance - Tool Review
Fleet Maintenance - A11
Fleet Maintenance - A12
Fleet Maintenance - Products
Fleet Maintenance - A14
Fleet Maintenance - A15
Fleet Maintenance - A16
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