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  1. #1
    Enthusiast Next Phase's Avatar
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    Need input 18 s front and rear on Gen 5

    Hello all,

    Getting ready for track season and purchased some Forgestars wheels for my 2017 GTC. I'm running 315/30 x 18 up front and 335/30 x 18 in the rear (Toyo R888R).

    Question is, will the ABS / traction control system have issues since my tire height is the same front and rear.

    I'm looking for experience from those that have gone down this path.

    Thanks in advance!

    -Marko
    2017 Viper GTC TA 1.0 aero (1 of 1) ; 2016 Shelby GT350 R ; 2015 Sublime Challenger Hellcat A8; 2019 Durango SRT Octane Red

  2. #2
    VOA Member
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    99RT10's Avatar
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    So comments form the peanut gallery are not welcomed?




    09 ACR With all the goodies
    99 ACR TT 99 red RT/10 Roe S/C
    97 B/W RT/10 TT 94 RT/10 TT

  3. #3
    Enthusiast Next Phase's Avatar
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    Opinions are welcome Mike, but I'm already mounted/installed. I have more to add, just looking for some expertise.
    2017 Viper GTC TA 1.0 aero (1 of 1) ; 2016 Shelby GT350 R ; 2015 Sublime Challenger Hellcat A8; 2019 Durango SRT Octane Red

  4. #4
    Enthusiast parabs's Avatar
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    I didn’t do 18/18, but I did go to a 19/19. Rear tire diameter stayed similar to stock, front changed from 25.0 to 26.0. About 3-5 miles in my traction control/stability control/whatever control went a bit bezerk for about 5 seconds and I never had an issue after that. I suspect you will be fine, but I’m interested to know how this will exactly turn out for you!
    Current: 2014 SRT Gunmetal Pearl w/Black Stripes

    Previous: 2005 Black SRT-10

  5. #5
    Enthusiast Next Phase's Avatar
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    Quote Originally Posted by parabs View Post
    I didn’t do 18/18, but I did go to a 19/19. Rear tire diameter stayed similar to stock, front changed from 25.0 to 26.0. About 3-5 miles in my traction control/stability control/whatever control went a bit bezerk for about 5 seconds and I never had an issue after that. I suspect you will be fine, but I’m interested to know how this will exactly turn out for you!
    Thanks for the input! I experienced the same, took the car out last night. The traction control light came on almost immediately, went off and came on 2 more times while going down the street.

    I decided to turn around on a side street to head back home. The light stayed off all the way until I got back to my driveway.

    Decided to keep driving and the light never came on. Drove it about 40 minutes. Highway, country roads and beat on the car. 130 mph on the highway. No issues after the initial 3 traction control lights came on.

    I'm thinking the computer learned the new speed sensor / wheel size and calibrated to it.

    Street driving isn't the same as on the track, so didn't want an issue to arise when going ten tenths on the track.

    Thanks for the input, I feel more confident to just send it!
    2017 Viper GTC TA 1.0 aero (1 of 1) ; 2016 Shelby GT350 R ; 2015 Sublime Challenger Hellcat A8; 2019 Durango SRT Octane Red

  6. #6
    Enthusiast Dr.Ron's Avatar
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    I run Hoosiers 315/345 on 18's. No issues, but try in sport mode if the light comes on again.
    Current:2014 GTS w/ TA 1.0 Aero,18 speaker HK, CF interior accents,SW's,Bone stock 11.44@127.86, Past:2011 Carbon Edition C6Z06, 2009 C6Z06-Bone stock on drag radials-10.75@128.19, 2006 C6Z06-Bone stock-11.242@122.38, 10.87@127 on DR's,2003 C5Z06-Bolt ons 11.214@122.30

  7. #7
    What are the wheel specs? Offsets? Etc.

  8. #8
    Enthusiast XSnake's Avatar
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    DADS ACR has 18/18 and tracks. Hasn't had any issues that I'm aware of.
    ACR-X #26 - 1992 RT/10 - Demon PCP - Ram 2500 Cummins


 

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