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Recently, while performing maintenance on the wheels of a trailer, it became
apparent that a wheel hub had a heavy spot. Having made incremental
improvements to the smooth running of my Tiger over the years, and having often
wondered whether the hubs could be a source of vibration, that trailer hub made
me determined to finally answer the question.
A front hub was removed from the Tiger and cleaned, hoping to use its own wheel
bearings (clean and dry) to perform the test. That setup wasn't sensitive
enough so I adapted a wheel balancer shaft with cones addressing the bearings
on each side of the hub and riding on high quality, dry bearings. The result
was that each of my hubs was out of balance on the order of 1/2 ounce. A hole
was drilled on the heavy side near the outer perimeter of the backing plate and
enlarged until the hub balanced. The final hole on each hub was 7/16".
As the hubs are relatively heavy and much smaller in diameter than tires and
wheels, I expected that in the end, this would prove to be an exercise to
eliminate the hubs as a source of vibration. On the contrary, the very first
test drive revealed a much improved ride with noticeably reduced vibration,
mostly in the 60+ mph range where an improvement was most appreciated.
If you would like to steady the steering wheel of your Tiger and improve its
ride quality, experience with my car suggests that balancing the front hubs is
well worth the effort.
Terry Packer9470018
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<html><head></head><body><div style=3D"color:#000; background-color:#fff; f=
ont-family:times new roman, new york, times, serif;font-size:16px"><div id=
=3D"yui_3_16_0_1_1447117849127_7284">Recently, while performing maintenance=
on the wheels of a trailer, it became apparent that a wheel hub had a heav=
y spot. Having made incremental improvements to the smooth running of my Ti=
ger over the years, and having often wondered whether the hubs could be a s=
ource of vibration, that trailer hub made me determined to finally answer t=
he question.</div><div id=3D"yui_3_16_0_1_1447117849127_7354"><br></div><di=
v id=3D"yui_3_16_0_1_1447117849127_7534" dir=3D"ltr">A front hub was remove=
d from the Tiger and cleaned, hoping to use its own wheel bearings (clean a=
nd dry) to perform the test. That setup wasn't sensitive enough so I adapte=
d a wheel balancer shaft with cones addressing the bearings on each side of=
the hub and riding on high quality, dry bearings. The result was that each=
of my hubs was out of balance on the order of 1/2 ounce. A hole was drille=
d on the heavy side near the outer perimeter of the backing plate and enlar=
ged until the hub balanced. The final hole on each hub was 7/16".</div><div=
id=3D"yui_3_16_0_1_1447117849127_7536" dir=3D"ltr"><br></div><div id=3D"yu=
i_3_16_0_1_1447117849127_7538" dir=3D"ltr">As the hubs are relatively heavy=
and much smaller in diameter than tires and wheels, I expected that in the=
end, this would prove to be an exercise to eliminate the hubs as a source =
of vibration. On the contrary, the very first test drive revealed a much im=
proved ride with noticeably reduced vibration, mostly in the 60+ mph range =
where an improvement was most appreciated.</div><div id=3D"yui_3_16_0_1_144=
7117849127_7540" dir=3D"ltr"><br></div><div id=3D"yui_3_16_0_1_144711784912=
7_7542" dir=3D"ltr">If you would like to steady the steering wheel of your =
Tiger and improve its ride quality, experience with my car suggests that ba=
lancing the front hubs is well worth the effort.</div><div id=3D"yui_3_16_0=
_1_1447117849127_7544" dir=3D"ltr"><br></div><div id=3D"yui_3_16_0_1_144711=
7849127_7546" dir=3D"ltr">Terry Packer</div><div id=3D"yui_3_16_0_1_1447117=
849127_7548" dir=3D"ltr">9470018<br></div></div></body></html>
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