ok need some help

[z28orshoot]

ok, after lots of searching, posts, and measuring on the car i have decided on the rims. i just would like other opinion and comments.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=170140335377&fromMakeTrack=true&ssPageName=VIP:Watchlink:middle:us
front 18*8.5 13et 5.30"backspace with 275tire
rear is 18*9.5 15et 5.8" back space 295tire

front chassis is stock UCA,LCA with qa1 coil overs, ls1 brakes
rear is stock springs, IAS shock(red), lt1 caliper with LS1 12" rotor rear brakes
this is on a 1970 z28.

does anybody see anything wrong with this? or problem areas. any comments would be peace of mind.

[tomspo04]

Nice looking wheels. I'd like to see pics once you mount them...

[skatinjay27]

from my calculations they the back spacings you got are wrong.
i got basically 5" front might work they might stick out a lil. but the rears i got a little over 5.30" in ther rear.the rears will be very close to the outter fender esp if your low....

[z28orshoot]

how did you get this.....i went by this chart. https://www.rsracing.com/tech-wheel.html



does anybody run a 8.5 and 9.5 combo on the early 2nd gen camaro?what is the backspace?

[skatinjay27]

how did you get this.....i went by this chart. https://www.rsracing.com/tech-wheel.html



does anybody run a 8.5 and 9.5 combo on the early 2nd gen camaro?what is the backspace?i did the math. say the wheel is 9.5 inches wide. 0 offset would be 4.75 bs. roughly 1"=26mm so 15mm is like 1/2 inch . 4.75" + 1/2" is 5.25.

the ideal would be 4.75 front 5.5 rear.

[72Z/28]

I have seen people run 5" backspacing for the front on the 2nd gens, but with 8 inch wheels. 5.5" backspacing for the rear with 9.5 " wheels

You can double check on the backspacing in www.nastyz28.com (http://www.nastyz28.com), there's a sticky for wheels and tires fitments.

[skatinjay27]

:hand: the fronts wont stick out the will prolly look good on the outer fender, but the will probally hit the sway bar at full lock to lock.

[Boesch]

i did the math. say the wheel is 9.5 inches wide. 0 offset would be 4.75 bs. roughly 1"=26mm so 15mm is like 1/2 inch . 4.75" + 1/2" is 5.25.

the ideal would be 4.75 front 5.5 rear.

Keep in mind that rim width is measured from bead seat to bead seat. If you measure the total outside dimension of the rim you will get a measurement that's wider than what the rim is. A 9.5" rim will measure closer to 10" in overall width, maybe wider depending on the manufacturer. Backspce is measured from the outer most part of the rim to the bolt plate.

Dustin

[skatinjay27]

Keep in mind that rim width is measured from bead seat to bead seat. If you measure the total outside dimension of the rim you will get a measurement that's wider than what the rim is. A 9.5" rim will measure closer to 10" in overall width, maybe wider depending on the manufacturer. Backspce is measured from the outer most part of the rim to the bolt plate.

Dustini heard that before but have always wondered if it was for all wheels thanks...

[Boesch]

i heard that before but have always wondered if it was for all wheels thanks...

This website shows it very well:

https://www.rsracing.com/tech-wheel.html#patterns

PS - The link to that website is in a sticky on the Wheel and Tire Forum