Product Service Bulletin
Important Information To Better Serve Your Customers
This PSB Is Applicable To: U.S. and Canada
March 2, 2018
PSB #2018-02
TO:

Goodyear Company Owned Stores, Independent Goodyear Dealers in the U.S.
and Canada

Subject: Vibration Issue with Tesla Model S Vehicles
If you encounter a consumer with a vibration issue on Tesla Model S vehicles, model years 2014
thru 2017, dismount and check all 4 tires to see if the tires contain foam. If the tires contain
foam, check to see if the foam inside any tire has come loose. If so, replace the tire(s) with loose
foam, and return for an adjustment with a return reason of “Loose Foam”, then check the vehicle
for vibration. If the foam is intact then follow the below process for match mounting.
Why is it Necessary to Match Mount?
When tires are mounted in a random position on the wheel and the wheel is bolted to the vehicle
in a random position, the individual components may sometimes be aligned to cause excessive
run-out. Excessive run-out may result in a vibration complaint. To minimize vibration
complaints, you must:
 Minimize tire/wheel assembly radial run-out.
 Accurately balance the tire / wheel assemblies.
What is Radial Run-Out?

Run-Out Stand & Gauge:

Radial run-out is the deviation of the tire / wheel
assembly from a perfect circle

In order to use this process, you will need a radial
run-out gauge and stand. See Product Service
Bulletin 2013-07 for details on ordering and using
a run-out stand and gauge.

THE GOODYEAR TIRE & RUBBER COMPANY, GOODYEAR CANADA INC.
PRODUCT SERVICE DEPARTMENT
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Simplified Match Mounting Process
This is not a complete guide to match mounting or vibration diagnosis, but is a simple approach
to use during replacement tire installation or when handling a vibration complaint.
1. If you suspect a tire/wheel, assembly has too much run-out, measure the radial
run-out on the balancer using a run-out gauge. Mark the high run-out point
location and magnitude on the tire and mark the wheel location as shown.
Mark the valve stem location with a “V”. .040 (forty thousandths of an inch) to
.050 (fifty thousandths of an inch) of run-out is enough to cause vibration in
some vehicles.

Not OK

OK

Balance and install assembly

2. Confirm that bead seating is concentric and the assembly centering on the
balancer is accurate. Rear coning assemblies on the balancer generally provides
the best repeatability and is strongly recommended.

3. Rotate the tire 180 degrees on the wheel and re-measure run-out.

Not OK

OK

Balance and install assembly.

4. Mark the 2nd high run-out point location and magnitude on the tire as shown.
it d

5. If the second
run-out is still
excessive and
falls within one
hour of the
original mark
on the wheel,
replace the
wheel.

If the second
run-out is still
excessive and
falls within
one hour of the
original mark
on the tire,
replace the tire.

If the second run-out is still
excessive and doesn’t stay with
the rim or follow the tire, draw
an arrow on the tire from
measurement 2 to 1 as shown.
Turn the tire 90 degrees in the
direction of the arrow. This
should make the run-out
acceptable.

6. Match Mount to Hub – Recommended Final Step for Sensitive Vehicles:

When match-mounting is complete, position the assembly run-out high point on
the vehicle hub at 12 o'clock before tightening the lug nuts. This will use any
hub-to-wheel clearance to help improve the on-vehicle run out. After installation,
measure radial run-outs of the tire/wheel assemblies again while mounted on the
vehicle. If any assembly measures outside the guidelines mark a stud location and
a reference mark on the wheel. Remove the assembly and re-install it as close to
180 degrees away from the original location as possible, (again the high point at
12 o’clock) then re-measure to see if the run-out improved.

Note: Judging assemblies by eye as they rotate on a balancer is not an effective method for
making decisions on tire or wheel replacement. However, it can be useful for deciding if run-out
measurements should be made.
If you have any questions or need assistance with match mounting, please contact the National
Field Manager Product Service for your area. You can locate the NFMPS in your area on Tire
HQ under Product Service/National Field Managers Product Service.
THE GOODYEAR TIRE & RUBBER COMPANY, GOODYEAR CANADA INC.
PRODUCT SERVICE DEPARTMENT
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