Fleet Maintenance - 41

T I R E TA C T I C S
Wear testing can be part of normal operations, which makes it relatively easy. It can be
conducted to simultaneously test various steer,
drive, and trailer tires against one another. The
disadvantage of wear testing is that it takes
a long time - at least six months to start - to
generate useful data. With that comes the likely loss of some tires, so the initial quantity of
tires and trucks needs to be large enough to still
allow a valid test.
Fuel economy testing, compared
to testing for tread wear, has the
advantage of being relatively quick
so that decisions can be made
and implemented. However, it
requires very high attention to
detail outside of normal operating practices. Because it requires
something beyond the normal
day-to-day work, it costs more to
conduct it.
Each test run can only evaluate one full set of steer, drive,
and trailer tires against another
set. This means that to evaluate
several different models of drive
tires, fleets would have to keep
all other tires the same while
running tests (and run replications of the tests), then repeat
the exercise to evaluate steer or
trailer tires.

Assessing tire
casings

Finally, the integrity of the tire
casing is an important factor.
This is the "residual value" of
the tire.
Look closely at the tire
manufacturer's warranty. It will
tell fleets how much confidence
the tire manufacturer has in its
tire, including the retreadability
of the casing. What the warranty offers projects the quality of
the tire and gives fleets assurances that the tire will perform
as advertised. A fleet's retreader should be able to advise
on rejection rates for various
brands of casings and how well
a given brand will hold up to
multiple retreads.

Putting it together

Without including fuel economy differences, here is a quick
calculation to analyze tire cost
per mile: (Original price - casing
value) / drive tire mileage = cost
per mile.
Consider these two examples:
Tire A
Original price - $400
Casing value - $40
Drive tire mileage - 370,000 miles
Cost per mile - 0.0973 cents/mile

Tire B
Original price - $500
Casing value - $50
Drive tire mileage - 400,000 miles
Cost per mile - 0.1125 cents/mile
Even though Tire B had more miles to removal, it was more expensive to run and not the low
cost of ownership winner.
To carry this example further, if a fleet is

running 100,000 miles per year, then the annual cost difference is a little over $15 per tire or
$120 for eight drive tires. That adds up quickly
for a large fleet of trucks.
It is important for fleets to do their homework
and take steps to analyze the tire program and
factor in cost, miles to removal, fuel economy,
and casing integrity. The study will be well
worth it.

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July 2019 | VehicleServicePros.com

41


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Fleet Maintenance

Table of Contents for the Digital Edition of Fleet Maintenance

Uptime - How you can make the most out of your shop's ROs
Foundation for success: How do you find and keep technician talent?
Vehicles - Examining the e-systems available for today's fleets
In the Bay - Do techs understand the fundamentals of electrical system diagnosis?
Shop Operations - How to assess replacement parts
Reman, Rebuild, Replace - Reasons fleets should consider reman
Economic Outlook - Uncertainties with today's global economy
Tire Tactics - Factors to help determine the lifecycle of tires
Management - The "shop improvement" conundrum
Fleet Parts & Components
Tools & Equipment
Classifieds
Guest Editorial - Increase shop efficiencies through fluid management
Fleet Maintenance - 1
Fleet Maintenance - 2
Fleet Maintenance - 3
Fleet Maintenance - 4
Fleet Maintenance - 5
Fleet Maintenance - 6
Fleet Maintenance - 7
Fleet Maintenance - Uptime - How you can make the most out of your shop's ROs
Fleet Maintenance - 9
Fleet Maintenance - Foundation for success: How do you find and keep technician talent?
Fleet Maintenance - 11
Fleet Maintenance - 12
Fleet Maintenance - 13
Fleet Maintenance - 14
Fleet Maintenance - 15
Fleet Maintenance - 16
Fleet Maintenance - 17
Fleet Maintenance - Vehicles - Examining the e-systems available for today's fleets
Fleet Maintenance - 19
Fleet Maintenance - 20
Fleet Maintenance - 21
Fleet Maintenance - 22
Fleet Maintenance - 23
Fleet Maintenance - In the Bay - Do techs understand the fundamentals of electrical system diagnosis?
Fleet Maintenance - 25
Fleet Maintenance - 26
Fleet Maintenance - 27
Fleet Maintenance - 28
Fleet Maintenance - 29
Fleet Maintenance - Shop Operations - How to assess replacement parts
Fleet Maintenance - 31
Fleet Maintenance - 32
Fleet Maintenance - 33
Fleet Maintenance - 34
Fleet Maintenance - 35
Fleet Maintenance - Reman, Rebuild, Replace - Reasons fleets should consider reman
Fleet Maintenance - 37
Fleet Maintenance - Economic Outlook - Uncertainties with today's global economy
Fleet Maintenance - 39
Fleet Maintenance - Tire Tactics - Factors to help determine the lifecycle of tires
Fleet Maintenance - 41
Fleet Maintenance - 42
Fleet Maintenance - 43
Fleet Maintenance - 44
Fleet Maintenance - 45
Fleet Maintenance - 46
Fleet Maintenance - 47
Fleet Maintenance - 48
Fleet Maintenance - 49
Fleet Maintenance - 50
Fleet Maintenance - 51
Fleet Maintenance - 52
Fleet Maintenance - 53
Fleet Maintenance - Management - The "shop improvement" conundrum
Fleet Maintenance - Fleet Parts & Components
Fleet Maintenance - 56
Fleet Maintenance - 57
Fleet Maintenance - Tools & Equipment
Fleet Maintenance - 59
Fleet Maintenance - 60
Fleet Maintenance - Classifieds
Fleet Maintenance - Guest Editorial - Increase shop efficiencies through fluid management
Fleet Maintenance - 63
Fleet Maintenance - 64
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