I got some 1986 IROC rims for my 86 Camaro. I've heard that 315/50/16 will fit but will be taller. Also I've heard that 295/50/16 is the widest that will safely go on a 8" rim.
I'm only talking rear here, my fronts will be 255/50/16.
I don't want the rear sticking outside the fender though.

------------------
86 Camaro Sport
383 Speed-O-Motive Crate Engine, Trick Flow Heads, 58mm Accel TB, 3.73 Auburn Pro, SLP Cold Air Induction and Headers, Dynomax Cat-back, Serpentine belt setup, Dual IROC Fans.

http://www.sethirdgen.org/octride.htm

 

A 315/50/16 will be too tall. It would have to be like a 315/35 or 315/40. 50 series would be to tall.

Saftey really isn't the issue (well, its one that should be addressed) but when it gets too wide, it hangs over the edge of the rim real bad and looks like crap. It will start looking crappy before it becomes unsafe. I have the 255's and it looks good with some hang over. I may eventually put the 255's up front and put some 260 or 275 in the back, but personally, I wouldn't go beyond 275.

------------------
If you live in Southeastern US, check us out!
South East Thirdgen


ASE Master Tech + L1
Savannah, GA

'87 Trans Am
S/D TPI retrofit including functional PassKey,
22# injectors,
JET AFPR,
Ported Plenum,
TB Coolant Bypass,
SSM SFC,
Boxed LCAs,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
KYB Shocks
-->14.97 @ 94.9 MPH<--

'97 Bonneville SSE

 

I found the answer here: http://www.devek.net/wheelfaq.htm
So on a 8" rim a 235mm tire yeilds a aspect ratio of .86 which is closest to the recommended .88


------------------
86 Camaro Sport
383 Speed-O-Motive Crate Engine, Trick Flow Heads, 58mm Accel TB, 3.73 Auburn Pro, SLP Cold Air Induction and Headers, Dynomax Cat-back, Serpentine belt setup, Dual IROC Fans.
http://www.sethirdgen.org/octride.htm

[This message has been edited by John Millican (edited November 25, 2000).]

[This message has been edited by John Millican (edited November 25, 2000).]

 

245/50-16 is the stock tire size for 16x8" rims. I have 255/50-16's on my rear tires. I was told not to go larger than that.

------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
13.25 @ 107.18 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Webmaster: SoCal F-Bodies
-=ICON Motorsports=-

 

I think this is pretty academic as the majority of the known tire manufacturers with the GOOD tires generally don't make anything wider than a 255/50/16. BFG did make a 275/50/16 (no smaller aspect ratios though) in their Comp T/As but they stopped manufacturing them (the last time I checked).

In the late 80s and and early 90s there were wider tires for 16" rims, but since 17" and 18" rims became common, few make any wide tires (wider than a 255) for 16" rims.

Lastly, on the stock rims, I think you'd find that anything wider than a 275 would rub on the inside. I hear 275s (when they were common) could rub on the inside if you hit a hard bump.

 

Good info Glenn,
I'm thinking 255/50/16 all the way around. I did see BFG Radial T/A 315/50/16 on sale for $124, that's a fat tire...


------------------
86 Camaro Sport
383 Speed-O-Motive Crate Engine, Trick Flow Heads, 58mm Accel TB, 3.73 Auburn Pro, SLP Cold Air Induction and Headers, Dynomax Cat-back, Serpentine belt setup, Dual IROC Fans.

http://www.sethirdgen.org/octride.htm

 

You could just put 255 all the way around, and then just get some crappy rims and put some real wide drag radials on them to take to the strip. (thats what alot of people do anyway)

------------------
If you live in Southeastern US, check us out!
South East Thirdgen


ASE Master Tech + L1
Savannah, GA

'87 Trans Am
S/D TPI retrofit including functional PassKey, 22# injectors,
JET AFPR, Ported Plenum,
TB Coolant Bypass,
SSM SFC, Boxed LCAs,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
KYB Shocks
-->14.97 @ 94.9 MPH<--

'97 Bonneville SSE

 

I was checking out tire sizes (they change all the time) and found BFGoodrich is offering a 265/50/16 and a 295/50/16 but it is only on the Radial T/A. BFG does not appear to offer the 315s anymore. The Radial T/As are a good highway/all-season tire and last a fairly long time (if you don't do a lot of burn outs). But, I prefer the Comp T/As for performance/strip/street use without getting into the Drag Radials, but 255/50/16s are the widest still available for both of those.

I agree with GMTech on a second (or possibly) third set of rims. I already have a second set of rims (15") for my snow tires and I may consider a third. The unfortunate fact is, there are just not a lot of tires available in 16" and what is there, is expensive. Guess you can figure out why I went with 15" rims for my snow tires. I was able to pick up 4 15" rims off a 2nd Gen Trans Am and 4 15" aggressive snow tires for the cost of 2 16" snow tires and there wasn't much selection either.

I am rapidly concluding that my 16" rims are only good if I plan to keep my car stock appearing for car shows (which I don't belong to). I will either go to 17" (which are expensive as hell too) or 15" (if you value your dollar).

[This message has been edited by Glenn91L98GTA (edited November 26, 2000).]