67 Wheel fitment help
 

I'm finally ready to pull the trigger on some new wheels/tires for my 67 Camaro. Stock 10 bolt rear with drum, stock disc breaks up front. I did have the rear leafs de-arched 2 1/2". I'm going with the Ridler 695(cheap). I've searched the forum and there are so many different opinions on wheels size. Can some explain the benefit of an 18" over a 17"? Our roads are brutal here so I'm a little concerned with 18". I found these wheels on sale and I'm ready to order but I want to make sure. I want the wheels to tuck nicely and tires need to fill the wheel wells.

F- 17x8. 4.75" BS. 225/40
R- 17x8. 5.5" BS. 255/40

OR

F-18x8. 4.5" BS
R- 18x9.5 5.5" BS


Can some please tell me this is correct?

I would consider 18" if there's a benefit.

thank you

Nothing??? Was there something wrong with my post? I'd like to get this figured out so I can buy these while their on sale.

really dude, chill, you only posted 50 min before and then you want an instant answer

18 allows you to have bigger brakes, and theres a larger selection race tire available, bad side is that the 18" tires cost more

17 limits the big brake kits, tires are cheaper

I changed the front tire size on the 17's
F- 17x8. 4.75" BS. 245/40
R- 17x8. 5.5" BS. 255/40

Thanks Rod. I thought I was prett chill, I didn't know if I needed more info in the original post that's all. It seemed like I was getting views but no response.

I have same kind problem. 67 Camaro drum brakes all around. I want put Hotchkis TVS 2" drop front and 1,5" drop rear and Baer track 4 13" disc front and SS4 12" disc rear.
I´m thinking 18x8 4,75bs rear wheel. How much space I should live to rear outside fender and inside ? On rear side wheel opening it´s very narrow only 11 3/4" and I can´t fit 5,25bs wheel. 255/45 with 18x8 4,25 bs leaves about 1/2"-3/4" gap, so is that enough ? How much hotchkis tvs system allow rear side movements ?
I can´t make measurement with this parts because those are just coming.
And front I´m thinking 17x7 or 8 4,25-4,50 bs, what is suitable and also tire size? I want to keep good balance of car and also outside look as well.

Here's what I learned when researching tire/wheel combos for a first gen a few years back...

In order to center the wheel in the openings these are the best backspacing numbers (wheel diameter doesn't matter 15,16,17,18,19,20,etc):

Info for an 18" setup:
18x7 4.25" BS
18x8 4.75" BS
18x9 5.25" BS
18x9.5 5.5" BS
18x10 5.75 BS

225/40's will (almost) always fit up front with the right backspacing. 235/40's have a good chance of fitting without issues. 245/40's are pushing it and might scrub on the inside on tight turns.

255/40's will (almost) always fit in the rear with the right backspacing. 265/40's have a good chance of fitting. 275/40's are pushing it and might scrub on the inside if the suspension isn't tight.