rim widths and tire sizes

Discussion in 'The Garage' started by Frank.JD.Perez, May 29, 2016.

  1. Frank.JD.Perez

    Frank.JD.Perez Well-Known Member

    Messages:
    2,820
    Likes Received:
    64
    Joined:
    Sep 8, 2013
    Location:
    Pleasanton/Hayward, CA
    so i plan to run 315s on both the front and back of my car when it is a strictly track only car, but that doesnt mean i cant work on fitting 315s in the rear before then. as you know FR500s (real ones) are 9 inches wide. im currently running 275s on them and Allen (9838stang) has shown you can fit 285s on a 9 inch rim. with all of the experience here on the site, how small of a width rim is needed to run 315s? im thinking of sending the FRs to weldcraft to get widened however much they need to be widened. also contemplating widening the fronts an extra inch (18x10). in the end the FRs wont be the rims i use on the track (ill probably use weld rts s77 or hre s101 or 300) but i do plan to keep them and put them on the bab 98 cobra i find in the future. so gents what say you?! TO THE KEYBOARDS!!!

    and thank you in advance
     
  2. the5.ohh

    the5.ohh Legend

    Messages:
    9,555
    Likes Received:
    108
    Joined:
    Oct 15, 2012
    Location:
    Shaolin, NY
    Nothing less than 10 inches. People run 285-295 on 10s and those are optimal fitment. You could run 315s on 10s.
     
  3. Frank.JD.Perez

    Frank.JD.Perez Well-Known Member

    Messages:
    2,820
    Likes Received:
    64
    Joined:
    Sep 8, 2013
    Location:
    Pleasanton/Hayward, CA
    im doing some research of my own as well. im thinking 1.5 in widening of both the front and rears. not sure how much that will effect my fronts though... the rims are already pretty close to the struts. ill probably need to run a spacer on front if i go and widen them
     
  4. g36 monkey

    g36 monkey Moderator Staff SN95 Supporter

    Messages:
    14,057
    Likes Received:
    539
    Joined:
    Nov 15, 2008
    Location:
    Orlando, Fl
    Yea, you will need to space out the front. Is it not cheaper to just buy wider wheels from the get go? I feel like widening is a painfully expensive process that is really only worth is on super expensive wheels you get a good deal on, IE BBS Rk's or CCWs or something
     
  5. Frank.JD.Perez

    Frank.JD.Perez Well-Known Member

    Messages:
    2,820
    Likes Received:
    64
    Joined:
    Sep 8, 2013
    Location:
    Pleasanton/Hayward, CA
    from weldcraft they charge 250 per wheel for .5 to 3 inch widening. if you want to keep ford original wheels that arent that common its worth it in my book. but again thats just me.
     
  6. Rob04Mach1

    Rob04Mach1 New Member

    Messages:
    74
    Likes Received:
    0
    Joined:
    Dec 1, 2015
    Great company they are (weldcraft) but don't be surprised if you end up with a little shimmy or wobble
    I had weldcraft widened Lightning Wheels on one of my Lightnings so I could run M&H Racemaster 345/35 Tires. They looked and worked great but they had a shimmy/wobble since day one.

    It wasnt until years later when someone followed me out of state one day and they called me on the cell as they were to tell me there was a slight wobble in my back left wheel. I eventually removed the wheels and the wobble went away....

    Nothing like a 10.8 on your street tires
    [​IMG]
     
  7. hotmustang95

    hotmustang95 Active Member

    Messages:
    602
    Likes Received:
    2
    Joined:
    Apr 6, 2011
    Location:
    Boynton Beach FL
    IDK man. $1000 just to widen a set of cheap wheels? I'd just buy 4 17X10 or 10.5 rims for under $500 and use the money saved towards the new rubber. That's what I plan to do in the future. Anyways the rear is no issue with 315's. The front fender however will need to be worked and you might need to run spacers but that's the easy part. Currently myself I run 17X9's on all 4 corners with 275 NT01s and 1/2" spacers. That's about the max you can get away with in front without modifying the fenders. A track buddy of mine who also has a SN95 runs 1" spacers all around with the same wheels/tires as myself and he had to cut the front fenders some and add flares.
     
  8. Rob04Mach1

    Rob04Mach1 New Member

    Messages:
    74
    Likes Received:
    0
    Joined:
    Dec 1, 2015
    ya man what he said, I paid under $200.00 for my (2) 17 x 10.5 Wheels with the Sticky Mickeys on them :headbang:

    mine came with (4) 17 x 9 w/ Falken Azenis FK452 Tires, 245/45 ZR17 & 275/40 ZR17
    I now have (2) 17 x9 w/ 245/45's on the front and (2) 17 x 10.5 w/ MT ET Street DR's on the rear P315/35R17

    If I wanted to put the 275/40's on the front would I need a spacer ???
    Personally I think it's plenty of tire as it is....[​IMG]