Yoko AVSis and Tire/Wheel musings.

[Robert_A_Brady@domain.elided (Robert A Brady)]

A few weeks ago, I asked the AD about their collective wisdom on tire choices 
for my '74 gtv.  I opted for Yokohama AVSi 195/65-14s.  The gtv has Shankel 
springs (not sure whether they are sport or race), Shankel front and rear 
sway bars, and spax gas shocks.  The wheels are Ronal 14x6.  I don't know the 
model, but they have four large, solid spokes, with single, thin spokes in 
between each large one.  

Before these tires, I had run a variety of tires, and the car always 
experienced a lot of oversteer, which I enjoy, but was ready to remove the 
rear sway bar in preparation of the CTAROC time trials.  

Well, with the Yokos, in addition to getting gobs more grip, the rear now 
stays pretty firmly planted, and the car is essentially neutral.  I can 
induce oversteer with some throttle, but it tends towards mild understeer 
when taking a curve with no throttle or brake.  The bottom line is that these 
tires have transformed the way the "package" comes together.  So, once again, 
remember that your car's suspension is a package, which includes the tires.

Also, IMHO, I think any tire wider than the 195s would have been overkill.  
Even the 195s seem to be a bit too much tire for this car.  I don't seem to 
have any clearance problems, although the fronts look close to the outside 
fender lips.  But, I'm starting to wonder when the 25 year old body is going 
to start tearing apart.  I'll also argue that it's not quite as much fun 
around town now, as you really have to push things (i.e. go much faster) to 
get the car to slide.  Others have said it in the past, and I agree, "skinny 
tires are fun."

Finally, if I had to do it again, I think I might opt for the 195/60's 
instead.  A friend has these on his GTV and the smaller diameter doesn't seem 
as noticeable as I thought it would.  I can also feel the 65's side wall flex 
a bit more than I expected.  But, I haven't played with air pressures much 
yet.

Anyway, some food for thought for those contemplating tires.

Bob Brady, DVAROC
'74 gtv
'88 verde
Yardley, PA

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