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YOUR RESEARCHStock wheels are heavy!
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Check their weight
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Suggestion · Original poster
Since it is a C4S, it uses the wider rear tires (295's) and wheels.
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Well, it is spring, and time to take the Blizzak's off the C4S for the summer. Didn't want to put the almost-worn-out Bridgestone Pole Positions back on, so I bit the bullet and ordered a tire/wheel package from Tire Rack. Michelin Pilot Sport PS2's on OZ Alleggerita wheels. Glad I'm typing it, since I can't pronounce it. Since it is a C4S, it uses the wider rear tires (295's) and wheels. Fronts are 225's.
The new wheels came with tags attached to them with their manufacture date and their weight. I decided to weigh my 3 sets of wheels/tires.
Stock Turbo Twists (18") with Bridgestone Pole Positions (almost to wear bars): Front: 50.3 lbs each, Rear: 60.4 lbs each.
Chromed 993 Turbo Twists with Blizzak's (265's on rear): Front: 46.8 lbs each, Rear: 56 lbs each.
OZ wheels with Michelin PS2's: Front: 39.6 lbs, Rear: 46.7 lbs each.
The new fronts are 10.7 lbs lighter than the stockers each, and the new rears are 13.7 lbs lighter each. That is a total reduction of 48.8 lbs! That's a lot of rotating inertia to lose!
Check out this article for the effect of this.
https://www.caranddriver.com/feature...-wheels-tires/
Also, when they arrived at my house (mounted and balanced), I put them on to find that the wheels would not clear the heads of the bolts attaching the 17mm rear spacers that the C4S's use. Called Tire Rack and they said that the spacers are not to be used. I did measure the back spacing, and the new wheels were slightly more off-set to the outside, but not 17mm. I put them on the car with no spacer, and they didn't look right, not pushed out to the edge of the fender to look good. I got some 7mm spacers, and that did the trick. Tire Rack missed the ball on this one. OZ could have easily made a pocket on the back of the wheels between the lug nut holes like the stock wheels have.
Any way, I am pleased with them and love the updated look. I know physics say the car is slightly quicker now, but I know that my seat-of-the-pants improvement feeling is likely mostly in my head.
The weight difference between various wheels can be surprising.When I obtained some 18" Carrera II wheels, I was amazed by how much lighter they were than the 17" Turbo twists.
Better looks and lighter weight is a great combination!
Yep. My C4s came with 19� NB replicas of the Carrera Classics, no bueno IMO. So I started shopping and found that many aftermarket wheels were the same or less weight at each corner... even over the oem hollow spoke.
This site
has the info you�re looking for and yes the NB hollow spokes are roughly 5lbs lighter per corner which translates to about what you�ve heard.
Car Looks great, Just needs a headlight polishing and restoration
Can someone point out the way to tell the difference between hollow spoke turbo twists and regular?
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[QUOTE=MoeMonney;16599622]Car Looks great, Just needs a headlight polishing and restoration
Thanks and yes they do need work. No pitting, but I can probably make them a lot clearer.
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