LS-ONE_DAY

Not sure if I should put this here or in the repairs section, but right now my car (stock A4 Formula with 2.73's) has 245/50R16 Sumitomo's on it which came with the car but I am thinking about possibly getting better performing tires for the rear. I found Nitto NT555R radials for $124 ea in this size but I was wondering how much these tires would increase the chances of breaking the 10-bolt rear.

I occasionally launch the car slightly off idle (1000-1200rpm) through the stock converter and I know they'll grip harder than normal street tires.

Right now I would like to stick with the 16" wheels rather then getting 17's unless I can find a nice package deal.

Thanks

Edit: The car will have BMR Lower Control Arms installed shortly. I have them, just waiting for the weather to cool off. I know that will give extra traction and might increase the chances of rear breakage already.

bigj2717

iTrader: (15)

With a stock auto the 10-bolt should hold up fine

LS-ONE_DAY

I am planning on adding a 3000-3400 stall sometime over the next year - year and a half but I wouldn't be taking the car to the track except maybe once or twice and I wouldn't be doing full stall launches. Would the 10 bolt be ok with that or is it iffy?

I do plan on getting a 12 bolt or 9" but it wont be for a good while

bigj2717

iTrader: (15)

Even with the stall you should be ok. I've seen auto guys running in the tens with a 10-bolt

LS-ONE_DAY

Rather than start I new thread I figured I would just ask this here, would putting larger tires on the car require the speedometer to be recalibrated?

A guy I know has some 16" TA wheels he said he will sell me that have Kuhmo's on the front and BFG drags on the back. The BFG's are 255's not sure about the Kuhmo's. The tires on it now are 245/50R16's.

I really have no clue when it comes to wheels and tires so if someone can provide an explanation as to how to know if something will fit that would be great too.

bigj2717

iTrader: (15)

It will if the tires change it height. 255 is the width

LS-ONE_DAY

Ok so as long as the 50 in the dimensions doesn't change I won't need to recal the speedo? (ex 245/50R16's -> 255/50R16's mean no realibration)

And then what if I were to get new wheels (15 or 17")? Same deal where recal is only needed if the aspect height changes from 50 to something else or would they need recalibration regardless because they are different size wheels?

bigj2717

iTrader: (15)

The aspect ratio number will probably change because it is the relation of side wall to width. A 255/50/16 is almost 1/2" taller and a 255/45/16 is a little more then 1/2" shorter. Neither should make a noticeable difference

LS-ONE_DAY

Ok thanks. I might look into just getting a set of 17's, maybe ZR1's if I can find a good deal on them with tires. I want something wider than 245's, somewhere between 255-295 width, and the same profile for all 4 tires and get it recalibrated then but idk. My other option is to go with the original plan like the beginning of thread and buy 2 Nitto 555R's for the back stockers and keep the Sumitomos on the front.

bigj2717

iTrader: (15)

If you get ZR1s just look for the 17X9.5 and run 275's all around. They'll fit perfect and you don't need to get anything calibrated.

LS-ONE_DAY

Cool thanks, thats what I was going for. But that would go for any 17x9.5 wheel, not just the ZR1's I assume? and what would be an example of the dimensions so that it wouldnt be calibrated, 275/50R17's or would the aspect drop to 275/40(or 45)R17?

If I was able to get 17's I might actually consider doing 275s on front and 295s on back but I'm sure that would require calibration or at least compensation and I don't have a programmer so thats why I dont want to deal with calibrations all the time.

bigj2717

iTrader: (15)

Yeah you'll want a 275/40. You can run a 295 in the back and still be fine. The most common size for ZR1s are 17X9.5 in the front with 275s and 17X11 in the back with 315. I ran them and you don't have to adjust for anything

LS-ONE_DAY

You've been a big help big, I appreciate it. I did some external searching and came up with a tire/wheel FAQ that I think has all the info I needed, some (if not all of which) you just covered for me here. I guess I'll be looking around for some 17" ZR1's or similar now!

http://www.camaroz28.com/forums/showthread.php?t=312442

You think I should bite the bullet and get a pair of 245 Nitto 555R's for the back of the car right now since I don't know when I'll be able to afford an extra set of wheels/tires or just save the $$ and keep the 245 Sumitomo's on there for now?

bigj2717

iTrader: (15)

If the tires you have still have plenty of tread on them I would just keep them and save up for what you really want

LS-ONE_DAY

Ok yeah I'll just save for 17s then. I know that 17x9's were optional on the WS6 and SS and that the ZR1's are 17x9.5 and 17x11. So it would probably be between those. But looking at the linked thread, if I get the 17x9's it looks like I can't stagger those at all meaning I'd have to do 275 all the way around because it doesn't look like 285's, much less 315's will fit on 17x9 wheels...at least according manufacturer specs.

If I get the staggered x9.5 and x11 for the ZR1's it looks like I could run all 4 at 275 and then have a pair of 315s to throw on the back if I wanted too.