GTA wheels
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Car: 91 Formula
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.23
GTA wheels
the 16x8 GTA wheels, which mine actually measure 8.5, how wide of a tire can i put for the rear wheels?? the 245's are ok but id like to do at least 255's or better if they fit on the wheel and in the wheelwell...... any ideas???
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Car: 85 Trans Am
Engine: 350 (CCC QJet)
Transmission: 700R4
Axle/Gears: 3.08 9 bolt
Originally posted by Zerstörer
You have to measure the inside bead to bead. 255s will throw your speedo off a lil bit.
You have to measure the inside bead to bead. 255s will throw your speedo off a lil bit.
Bead to Bead yes.
Speedo: When you go wider, you make the aspect (height like 45) lower to compensate for the smaller wheel
Example: 245/55-16 = 26.6", 265/50-16 = 26.4" which means 60Mph vs 59.6Mph (analog gauges arent that noticable )
BTW, this isnt a flame just providing a more detailed answer
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Car: 1992
Engine: 350TPI
Transmission: T-56
Originally posted by Forshock 85TA
Correct and Wrong (mostly)
Bead to Bead yes.
Speedo: When you go wider, you make the aspect (height like 45) lower to compensate for the smaller wheel
Example: 245/55-16 = 26.6", 265/50-16 = 26.4" which means 60Mph vs 59.6Mph (analog gauges arent that noticable )
BTW, this isnt a flame just providing a more detailed answer
Correct and Wrong (mostly)
Bead to Bead yes.
Speedo: When you go wider, you make the aspect (height like 45) lower to compensate for the smaller wheel
Example: 245/55-16 = 26.6", 265/50-16 = 26.4" which means 60Mph vs 59.6Mph (analog gauges arent that noticable )
BTW, this isnt a flame just providing a more detailed answer
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Car: 85 Trans Am
Engine: 350 (CCC QJet)
Transmission: 700R4
Axle/Gears: 3.08 9 bolt
Im not sure i have the 15" wheels
But the same methods apply regardless, see:
http://www.miata.net/garage/tirecalc.html
But the same methods apply regardless, see:
http://www.miata.net/garage/tirecalc.html
#7
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Car: 91 Formula
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.23
wheels origional from a 92 T/A ws6 optioned car.... and from lip to lip just inside that outer flare it measured 8.5...... the car came with 245 50/16 tires..... so going up to 255's or better will screw my speedo???
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Car: 1991 Pontiac ta 5.0l 2005 pontiac gxp 5.3l ls4 dod 2003 GMC Envoy 4.2l
I have also seen 215/60/16 from stock also on some 91 ta's maybe more years but thats the year I have and what the door shows as the stock tire.
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Car: 1991 Pontiac ta 5.0l 2005 pontiac gxp 5.3l ls4 dod 2003 GMC Envoy 4.2l
Your size seems to be more common from factory for a while I thought I had the wrong size on the car till I looked at the door sticker. When you read most posts my size never comes up but I find I can find cheaper tires because they are more of a passenger car tire not quite as wide. Althought there seems to be a lot of touring tires in that size.
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Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5
Don't worry about the speedo when going to a 255/50/16 tire. It's not like it's going to be 10mph off, probably 1-2mph, and you won't even notice it.
I don't notice when swapping from my 275/40/17's to my 255/50/16's on my car.
I don't notice when swapping from my 275/40/17's to my 255/50/16's on my car.
#12
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Originally posted by meangreen92
wheels origional from a 92 T/A ws6 optioned car.... and from lip to lip just inside that outer flare it measured 8.5...... the car came with 245 50/16 tires..... so going up to 255's or better will screw my speedo???
wheels origional from a 92 T/A ws6 optioned car.... and from lip to lip just inside that outer flare it measured 8.5...... the car came with 245 50/16 tires..... so going up to 255's or better will screw my speedo???
Originally posted by 91blkta
I have also seen 215/60/16 from stock also on some 91 ta's maybe more years but thats the year I have and what the door shows as the stock tire.
I have also seen 215/60/16 from stock also on some 91 ta's maybe more years but thats the year I have and what the door shows as the stock tire.
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Car: 1991 Pontiac ta 5.0l 2005 pontiac gxp 5.3l ls4 dod 2003 GMC Envoy 4.2l
I have the black gta wheels with chrome ring which came on the 91' trans am, with the different front to rear offsets. They fit just don't have as big of a footprint as a foot print.
Last edited by 91blkta; 05-15-2005 at 03:07 AM.
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Car: '91 TA vert
Engine: turboLSx
Transmission: T56
Axle/Gears: 3.23
Originally posted by 91blkta
I have also seen 215/60/16 from stock also on some 91 ta's maybe more years but thats the year I have and what the door shows as the stock tire.
I have also seen 215/60/16 from stock also on some 91 ta's maybe more years but thats the year I have and what the door shows as the stock tire.
The door will list other things besides what might be in your car. It should have the listing for all tires combos from that make/model.
Besides a 60 series tire would be HUGE on a 16" wheel on these cars.
I'd double check.
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Car: Hers: 88 Formula 350
Engine: TPI
Transmission: Auto
Axle/Gears: 10 bolt Posi
Originally posted by meangreen92
wheels origional from a 92 T/A ws6 optioned car.... and from lip to lip just inside that outer flare it measured 8.5...... the car came with 245 50/16 tires..... so going up to 255's or better will screw my speedo???
wheels origional from a 92 T/A ws6 optioned car.... and from lip to lip just inside that outer flare it measured 8.5...... the car came with 245 50/16 tires..... so going up to 255's or better will screw my speedo???
but i believe it's still classified as 8
my weld drag lites same thing, claiper on the balancer measure 8.5 but they were 8 when i bought them.
perhaps a 1/4" for each lip???
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Car: 1997 Corvette
Engine: LS1
Transmission: 4L60E
Axle/Gears: 2.73 IRS
As stated above, the car should have 16x8's on it with 245/50R16. I'll have to check the sticker on my '88 to see if it mentions anything about a 215 tire on a 16" wheel.
Also, 215s may fit on an 8" wide rim. For my winter tires, I ran 225/60R16 tires on 4th gen saladshooters (16x8). Those 225s fit without a problem and I didn't see any abnormal wear.
Also, 215s may fit on an 8" wide rim. For my winter tires, I ran 225/60R16 tires on 4th gen saladshooters (16x8). Those 225s fit without a problem and I didn't see any abnormal wear.
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Car: 91 Formula
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.23
thanks guys, i needed the info cause im due for tires and since the rear wheels dont fit in the front, i wanted to go a little wider... it rains all the damn time down here in FL and traction is an issue to begin with on the t/a...
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Car: 86 Trans Am, 88 Formula
Engine: 95LT4, 305TPI
Transmission: T56, T5
Originally posted by meangreen92
thanks guys, i needed the info cause im due for tires and since the rear wheels dont fit in the front, i wanted to go a little wider... it rains all the damn time down here in FL and traction is an issue to begin with on the t/a...
thanks guys, i needed the info cause im due for tires and since the rear wheels dont fit in the front, i wanted to go a little wider... it rains all the damn time down here in FL and traction is an issue to begin with on the t/a...
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Car: 1997 Corvette
Engine: LS1
Transmission: 4L60E
Axle/Gears: 2.73 IRS
Wide tires SUCK in the winter too (ask me how I know). Then again, I don't think you'll see much of that in Florida
Wide tire = more contact area. Same downforce applied (vehicle weight) over larger contact area = lower pressure (lb/in^2). Things are different in dry weather and even moreso with very sticky tires (i.e. slicks).
Wide tire = more contact area. Same downforce applied (vehicle weight) over larger contact area = lower pressure (lb/in^2). Things are different in dry weather and even moreso with very sticky tires (i.e. slicks).
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Car: 91 Formula
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.23
well when i bought the car someone had put 225 60 16's all around on the car... they were cheap passenger tires and they sucked, esp the rears.. when i stepped back up to the factory size, it handled better and had more traction from 40mph up... anything under 40 no matter what tire i have on theres no traction, just a show.....
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