dreco Posted December 10, 2012 Share Posted December 10, 2012 Looks like i'm getting a set of the Rota RB's for my 240Z. What set up would be the best? 17X9.5 all around? or 17X9 up front. Can anyone tell me the handling characteristics from these setups? I have the fender flares installed, but i wanted to see if there were any handling benefits from running the 275's on all corners. Quote Link to comment Share on other sites More sharing options...
BluDestiny Posted December 10, 2012 Share Posted December 10, 2012 How much hp are you making? and what suspension are you running? Lastly when you get these tires will they be for looks or actual track/autox time. Note I didn't say performance, I said track/autox time. You will get more rubber if you go 275's all around, but you will also gain weight. That is why I ask the above questions. I know SunnyZ put 275's all around. Quote Link to comment Share on other sites More sharing options...
madkaw Posted December 10, 2012 Share Posted December 10, 2012 Not to thread jack....but a related question. I'm running 17X8.5 with 245's all around -square. Is there a problem running a stagger if I decided to get 9.5's for the back and ran 275's just on the rear. Is there negative effects running staggered sizes as far as handling for a DD that does some autoX. Quote Link to comment Share on other sites More sharing options...
johnc Posted December 10, 2012 Share Posted December 10, 2012 What set up would be the best? Remember, there is no best on HybridZ, Is there negative effects running staggered sizes as far as handling for a DD that does some autoX. Running staggered tire sizes sets the car up for more underteer in steady state cornering. It isn't an issue for a street driven car because you rarely, if ever exceed 8/10ths on the road. For your autocross plans it will be an issue. Quote Link to comment Share on other sites More sharing options...
BluDestiny Posted December 10, 2012 Share Posted December 10, 2012 John, is there any way to reasonable correct that understeer with adjustable suspension like changing camber, or is there anything you can do to the front tires to counteract this? I am thinking that what you said is more of a rule of thumb and would just like to know more. Quote Link to comment Share on other sites More sharing options...
johnc Posted December 10, 2012 Share Posted December 10, 2012 A staggered setup can handle well. Basic suspension tuning (springs, shock adjustment, bars, alignment, air pressures) is all that's needed. Amir's old SR20DET 260Z with 255s front and 275s rear handled well and was fairly neutral on the track. But that same car would have been a bit faster around the track with 275s all around. We could have moved more roll stiffness to the front of the car because the 275 width tires could handle it. Doing that would have allowed us to soften the rear a bit and helped put power down. We're talking small changes (25 lb. in. in spring rate, 1 mm in bar thickness) but it would have reduced the lap times. Quote Link to comment Share on other sites More sharing options...
wfritts911 Posted December 10, 2012 Share Posted December 10, 2012 I have 275s all the way around on my 17x9.5 Rotas. The main thing for me when I decided to not stagger my wheels was being able to rotate my tires. Can't really vouch for the handling characterstics as my suspension is sub par at best, but my car is quick around the autocross for having blown struts and what not. SunnyZ is also running 275s on all 4. Unless you have a specific reason for not wanting fat tires up front, then I say go with the 275s all the way around. -Will Quote Link to comment Share on other sites More sharing options...
Leon Posted December 10, 2012 Share Posted December 10, 2012 Don't forget deceleration as well. Wider tires up front will improve traction during heavy braking. Quote Link to comment Share on other sites More sharing options...
dreco Posted December 11, 2012 Author Share Posted December 11, 2012 (edited) Thanks for the replies. This car will see a good amount of track duty. I've not dyno'd my engine yet, but it is a cam'd LS6. suspension is poly bushings(camber adjustable) tokico springs and struts (not adjustable). upgraded tension rods, shortend steering knuckles. I will be going coil over however. 1 inch sway bar front along with rear sway bar. 3.9 R200 LSD. I tracked my car quite a bit running 15/ 225's hoosiers all around and a 3.0L stroker motor. Car still had quite a bit of understeer. for the record, i like GO more than SHOW. I went ahead and orderd 9.5's all corners. Jumping in with both feet!!! Edited December 11, 2012 by dreco Quote Link to comment Share on other sites More sharing options...
heavy85 Posted December 17, 2012 Share Posted December 17, 2012 My car is dedicated V8 track car. I have tried the 9.5 vs 9 in the front and the rear and ended up with the wider rims in the front. Wish I had the wider ones all around. They are all 255 tires but you can still tell a difference. You made a wise choice IME. Cameron Quote Link to comment Share on other sites More sharing options...
dreco Posted December 26, 2012 Author Share Posted December 26, 2012 My car is dedicated V8 track car. I have tried the 9.5 vs 9 in the front and the rear and ended up with the wider rims in the front. Wish I had the wider ones all around. They are all 255 tires but you can still tell a difference. You made a wise choice IME. Cameron thanks.. My wheels just came in! Quote Link to comment Share on other sites More sharing options...
Forcer Posted December 27, 2012 Share Posted December 27, 2012 Pics? Quote Link to comment Share on other sites More sharing options...
dreco Posted December 27, 2012 Author Share Posted December 27, 2012 (edited) Pics? sorry, Theyre at the shop. Went down to inspect them but completely forgot to snap pictures haha. I'll probably get to it this weekend. FYI I got them in Royal Black with the Polished lip. Edited December 27, 2012 by dreco Quote Link to comment Share on other sites More sharing options...
Hypertek Posted December 30, 2012 Share Posted December 30, 2012 you will be fine with whatever size, You wouldn't want to race track with heavy rotas anyways =) Quote Link to comment Share on other sites More sharing options...
dreco Posted December 31, 2012 Author Share Posted December 31, 2012 you will be fine with whatever size, You wouldn't want to race track with heavy rotas anyways =) meh, i've raced my car on heavy 15X7's with used miata spec hoosiers.. I deal with it. Quote Link to comment Share on other sites More sharing options...
dreco Posted January 7, 2013 Author Share Posted January 7, 2013 put them on to see how they'll fit. Quote Link to comment Share on other sites More sharing options...
Never2BeFinished Posted March 28, 2013 Share Posted March 28, 2013 Those look fantastic! im considering those same wheels and size and color...since those are the widest 4 lug wheels i could find that arent custom Any fitment issues? Quote Link to comment Share on other sites More sharing options...
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