I know there are many threads devoted to the topic of track tires and wheel setups, but I specifically have a question regarding aspect ratio and ride height. So I
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08-05-2018, 04:05 AM | #1 (permalink) |
Track Member
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Advice on track tire size
I know there are many threads devoted to the topic of track tires and wheel setups, but I specifically have a question regarding aspect ratio and ride height.
So I decided to get track-only wheels and tires and am going with the Enkei NT03+m in a 10.5x18 +30 on all four corners and Nitto NT01 tires. My question is 275/35 or 275/40? The 275/35 diameter is 25.55" vs. the 275/40 is 26.65". I don't want to bottom out all over. Does it matter very much? As for my car, I am lowered only on Swifts at the moment with SPL front A-arms and rear camber arms. Front camber is -2.6, rear is -2.1. Currently, I have had some inner fender liner rub with the stock sport wheels on 245 RE-11's at some tracks. Of note, at ZDayZ, some people mentioned my drop on Swifts looks a little more than others. I don't know if that is true, as I only know my car. So, don't want to bottom out. Don't want to rub. 275/40 are $300/tire and the 275/35 are $259/tire. What do you all think would be best?
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08-05-2018, 04:58 AM | #2 (permalink) |
A True Z Fanatic
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I run 275/35R18 NT01 on 9.5 x 18" Enkei's (+13 at the rear and +25 at the front) on KWv3 lowered 20mm at the front and 15mm at the rear and and have no problems with bottoming out.
I also run a 3.9:1 diff ratio on longer tracks and 4.08:1 on the tracks with shorter straights. If you measure from the bottom of your front and rear rims to the guard I can compare your ride heights with mine and tell you "how low" you have gone In the FSM, there is a section which gives the OEM spec's but I was not able to quickly find it ... "search" may help your their |
08-05-2018, 05:05 AM | #3 (permalink) |
A True Z Fanatic
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The 35 series tires will be quicker on the track & less likely to rub.
Lots of track guy’s run tires below 26” PM Hotrodz; as one of his track setups are 18x10.5+30,,,unsure the tire size. He’s putting down over 600whp...so he should be able to answer your questions.
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08-05-2018, 05:31 AM | #4 (permalink) |
Track Member
Join Date: Jun 2011
Location: Delafield, WI
Age: 44
Posts: 618
Drives: 09 370Z, 14 SRT GC
Rep Power: 35 |
Thanks for the quick replies so far. Can you tell it’s been a slow night here in the ICU. I’m researching tires at 4am.
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___________ '09 6sp/Z1/PowerTrix/SPL/Swift/SRP/Whiteline/F.I.LTH&CBE/UpRev by Seb/CJM/Stillen/Ings+1/RJM/TrackSpec/Sparco/Motul/Wavetrac/Coolerworx/Verus/CraftSquare '14 SRT Grand Cherokee; '08 TL Type-S |
08-05-2018, 05:36 AM | #5 (permalink) |
A True Z Fanatic
Join Date: Nov 2014
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Rep Power: 2684395 |
Hotrodz @Zdayz w/18’s strapped on,,,pic not good enough to zoom in on tire size.
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MazWorx built long block | FI-TT-100 Stage 2.75 | IPT built 7A/T http://www.the370z.com/members-370z-...s-musings.html |
08-05-2018, 11:21 AM | #6 (permalink) |
A True Z Fanatic
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On that set of rims I am running 295 30 r888. I have had no issues with rubbing at all. I also run a set of Volks in 18x11 +12 square with 315 nt01 square with no rubbing and I am lowered on Fortune Auto coilovers. I plan on running r888r 305 30 on my next set of tires for Enkies. They will be my street and wet weather tire lol.
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08-05-2018, 02:20 PM | #8 (permalink) | |
A True Z Fanatic
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Quote:
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Fast Intentions TT Installed and Tuned by Seb at SpecialtyZ 610whp 560tq:|Fast Intentions 3" TT-TDX|SpecialtyZ/Fast Intentions 72 Row Oil Cooler|SZ 6 Puck Clutch & Flywheel|3GsCustoms|Z1|Wavetrac|Hotchkis|Whiteline |Blitz|Fortune Auto 500|Fujimura|SPL|H&R|TK|TWM|RPM Rollbar|Sparco|Next Level Performance|TrackSpec|AeroFlow Dynamics|Pioneer| |
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