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19.5 Inch rims [message #64653]

Tue, 17 November 2009 17:21

seven

Messages: 322
Registered: July 2008
Location: Calgary Canada

Karma: 0

Senior Member

Anyone ever try over sized rims with low profile tires, I have often thought of this and even looked into tire options which make them the same radious or is it circumference or is it both? for gearing, I think the lighter rotating mass would be an asset?

http://www.gmcmhphotos.com/photos/showphoto.php?photo=31659&ppuser=1923

Jay Fox Calgary AB
73 Painted Desert (Turtle)
78 Transmode (Trailer Donor)

[Updated on: Tue, 17 November 2009 17:29]

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Re: [GMCnet] 19.5 Inch rims [message #64680 is a reply to message #64653]

Tue, 17 November 2009 19:39

USAussie

Messages: 15912
Registered: July 2007
Location: Sydney, Australia

Karma: 6

Senior Member

Jay,

I had a mechanically challenged Mate up in Brisbane with a Mercedes 350 call
me to ask what I thought about going from his standard rims to larger ones
with low profile tires. I told him that vehicle suspension design took the
cross section of the tire and sidewall height into consideration for ride
quality. I noted that he probably would get a harsher ride. He thanked me
and a month or so later he contacted me and advised he had gone ahead with
it and now his ride quality sucked and he was not a happy chappy!

Realizing that a GMC is a far cry from a Mercedes I think the ride quality
should be taken into consideration.

Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426

-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Jay Fox
Sent: Wednesday, 18 November 2009 10:21 AM
To: gmclist@temp.gmcnet.org
Subject: [GMCnet] 19.5 Inch rims

Anyone ever try over sized rims with low profile tires, I have often thought
of this and even looked into tire options which make them the same radious
for gearing, I think the lighter rotating mass would be an asset?

http://www.gmcmhphotos.com/photos/showphoto.php?photo=31659&ppuser=1923
--
Jay Fox
Calgary AB Canada

73 Painted Desert (Turtle)
Wifes 75 Transmode (Unutter1)
78 Transmode (Donor)

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Regards, Rob M. (USAussie) The Pedantic Mechanic Sydney, Australia '75 Avion - AUS - The Blue Streak TZE365V100428 '75 Avion - USA - Double Trouble TZE365V100426

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Re: 19.5 Inch rims [message #64785 is a reply to message #64653]

Wed, 18 November 2009 14:20

Duce Apocalypse

Messages: 824
Registered: May 2009
Location: Los angeles

Karma: 0

Senior Member

thats a given, low profile tires have much stiffer reinforced sidewalls to handle the load, they yeild much less which is why they grip alot better on the road in a performance application. however, they also transmit much more road vibration, so if you go with stiffer lo-pro tires you will get stiffer ride.

wh no just go with 245 tires and a lower final drive? the estra 20mm of rubber will give you a bit more grip if thats what your looking for...

73 Canyon Lands, (a.k.a. The Yellow Submarine) West Los Angeles CA

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