This guy's site may interest everyone with tire questions for TR2-4s he
seems to have done a lot of work finding out what does and doesn't work
on an MGA which uses the same tire and wheel sizes.
http://mgaguru.com/mgtech/tires/tire1.htm
Doug Hamilton
1960 Triumph TR3A
1963 Fiat Cabriolet
>Date: Tue, 4 Feb 2003 22:00:51 -0800
>From: "Randall Young" <Ryoung@navcomtech.com>
>Subject: RE: Tire pressure
>
>
>
>>> List,
>>> I'm wondering what tire pressure to run on my 1962 TR4 with
>>> modern Kumho radials size 165/75 R15 on 4.5x15 wire wheels. All
>>> the info I can find in the owner's manual etc... refers to the
>>> old bias ply tires. What are people running?
>>> TIA, Earl Bowman
>>> CT11550L
>>
>>
>
>Earl, there is no single 'right' tire pressure, the best value depends on
>what you want. With modern steel radials, lower pressures tend to give a
>smoother, softer ride; while higher pressures tend to ride harsher, but
>respond quicker to steering input and frequently hold the road better (more
>lateral traction). I usually start at, or near, the maximum pressure stated
>on the sidewall, then work my way down in small increments (like 2 psi)
>looking for best handling with an acceptable ride. Haven't had a chance to
>start that process with the latest tires on either my TR3A or Stag, the TR3A
>has 36 psi at present, the Stag 32 (because that's what the wheel dealer put
>in). Of course, you can only compare pressures with the tires cold (the
>pressure goes up when the tire warms), so this process extends over at least
>several days.
>
>Randall
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