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Thread: tire size question
01-18-2014, 05:35 PM #1
tire size question
getting ready to order tires for my 13 shelby,heres the question,has any one put 315 35 20s on stock rear rims,and if so did the side walls stick out past fenders or experience any rubbing?
01-18-2014, 07:25 PM #2
305s would be pushing it. 315s no way on 9.5" rim
01-18-2014, 08:36 PM #3
01-18-2014, 09:18 PM #4
The widest tire Michelin recommends for our stock 9.5" rims is a 285. A number of folks are running 295s without any problems. I recommend against going any larger.2013 Shelby GT500 Coupe, Triple Black, SVTPP, SVTTP, Recaros, Electronics Pkg, Shaker Pro, & Cover / 642RWHP, 621FT-LBS
#908 of 1464, Built on 16 Oct 12, Delivered by Whitney's Value Ford in Elma, WA on 9 Nov 12
Mods: MPSS Tires; Base Wheels; Revan Racing Reservoirs, Stainless Brake & Clutch Lines; JLT CF Intake; Airaid SynthaMax Filter; Bob's Oil Separator; FRPP Strut Tower Brace; Shelby Billet Caps; Powder House Coil Covers; MGW Shifter; Ford Racing & AeroForce Interceptor Gauges; Jaeger Bros Stone Guards; VLED 5K Driving Lights; Clutch-Assist Spring Removed; TF Heat Extractor; Redline Tuning Struts; Viper Ultra Tint; LED Map, License Plate, & Trunk Lights; Raxiom Tail Light Sequencer; Mustang GT Leather Steering Wheel; Rogue Radar-Mount; BEL Vector 995; Lloyd Mats; Shelby Dash Plaque; CravenSpeed Stubby Antenna; JLT Painted Radiator Cover; Amsoil Lubricants; Adam's Detailing Supplies
Originally ordered from Phil Long Ford Chapel Hills (CO) on 18 Jun 12, my order dropped from "#1 of 3" to "#3 of 2" on 19 Sep 12
Moral of the story: Do NOT shop Phil Long Ford Chapel Hills in Colo Spgs, CO
01-19-2014, 02:19 AM #5
I'm currently rocking 315 NT05Rs on my stock wheels, they fit perfect and the car still handles great. Or you can run 305/35R20 Mickey Thompson ET streets. I definitely will be trying those next, I want more traction
2013 GT500, VMP Tune, blackops trinity tvs, VMP 67MM T/B, 2.39 pulley, BPS ported inlet, Metco Aux idler, JLT 127MM intake, Shelby C&R heat exchanger, supersnake front splitter, supersnake gauges, lethal OFR X pipe, MagnaFlow catback and some 315 DRs currently making 683WHP & 686WTQ
2008 GT500 gone, but not forgotten
2011 GT/CS, intake, OFR X and tuned, sold
95 GTS 5.0 H/C/I and 100 shot, sold
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01-19-2014, 01:10 PM #6
thanks for the help,still don't know what i'll do.but i'm still leaning towards 315s for more traction
01-19-2014, 01:31 PM #7
01-19-2014, 04:58 PM #8
01-19-2014, 05:42 PM #9
Is anyone running the ET Street radial on the stock wheel? If so how do they fit?
01-19-2014, 09:33 PM #10
01-20-2014, 01:28 AM #11
If you opt for the MPSS 315s, you'd be best served to refrain from attempting a jerry job on the stock rims. I have a pair of MPSS 315s sitting in my office (the only place in Casa Smackiavelli safe from the determined efforts of my two behemothic, testicularly-equipped canines to mark them) awaiting the arrival of their companion rims. My measurements show the MPSS 315s to be a full two inches wider than the stock GY 285s (caveat: this assessment has been made by a wordmatician who experiences the challenge of solving Fermat's Last Theorem every time he counts the number of wheels on his Shelby). Like Senor 2112 (if I'm not mistaken), I ordered 11" Forgestar F14s on which I plan to mount the rear meats (9.5" for the 275/40/19 fronts). All indications are that for the Michelins, if not for many 315s, 11" rims represent the ideal mate. I'm sure for the brands that are not pushing the boundaries of their sizes, as do the Michelins, a 10.5" wheel is suitable for 315s. I agree with Nawwwwww-tuuuuuuun, however, that 295 is about as wide as you should go on the stock (rear) rims if you choose the MPSSes.
Good luck and may The Traction be with you.Who is Smackiavelli? Street rocket addict, battle-proven scrivener, intemperate bibliophile, alpha figure to dos gigante Canis lupus familiaris, the living nightmare of car forum trolls, hunter of violent cyclonic rotation, and virulent lexical assassin.
Vehicles: 2007 Trailblazer SS (not stock), 2014 Shelby (SGM, white stripes), and 1981 Zastava Koral 0.9L
01-20-2014, 01:38 AM #12
I've seen a set of 295 invos and mpss tires on a 9.5 wheels. The invo look odd with the side wall bulging out but the mpss looked great. The side wall pushed out past the wheel but it was still perfectly flat. No bulge to it. It looked like it would protect the wheel also if you happen to hit a curb. I'm not sure but I think mpss tires have very thick sidewalls because of this.1999 Ford Lightning
01-20-2014, 09:54 AM #13
Smack, what changes do have to make to fit the forgestars/315s? I've been looking to run same rim/tire set up.
01-20-2014, 12:30 PM #14
Another factor is if you have correctly installed/adjusted panhard bars. In most cases, this suspension mod also aids in avoiding contact with the bump stops. Again, though, that is not a hard and fast rule (some GT500es with larger rims/tires and panhard bars installed still experience rubbing against the bump stops, although this most often occurs when the car is lowered more than 1.5"). The bottom line is that chances are good you can run MPSSes on the 20X11 Forgestars devoid any modification, but don't don't be surprised if it turns out that you must relocate the bump stops.
One other note: I went with offsets of +53 for the rears and +35 for the fronts. I recommend you do close to the same if this is the setup you end up choosing.
01-21-2014, 07:03 PM #15
One other note, if your desire is more traction and you are spending more money on the wider tire, you are effectively waisting some of that money bc you are narrowing the tire contact patch by squeezing it on a narrow wheel. Either have the wheels widened or save money and get 295s or maybe 305s. Hell I haves 305s in the works for my 11" wheels currently being built. I wanted 315s but other constraints prevented that ;)
Btw, I too went 9.5 (35mm) and 11(52mm).
Last edited by 13RaceRedShelby; 01-21-2014 at 07:24 PM.2013 Shelby GT500, Race Red, Black Stripes, Performance Pkg, Glass Roof, Navigation, ShakerPro Audio
Engine Mods: Kooks 1-7/8 LTs, Kooks Offroad X-pipe, Flowmaster 3" Axle-back (prototype), VMP 2.4" Interchangeable pulley/hub, FRPP 65mm TB, JLT 127mm CF Intake, Moroso Reserviors, Bob's Oil Separator, CFM Breather, Lund Tune
Suspension Mods: Eibach Sportline Springs, BMR Adjustable Panhard Bar, BMR LCA Relocation Brackets
Appearance Mods: TruCarbon Hood Vent, Splash Gaurds and Gurney Flap, APR CF Custom Splitter, Rennen Forged 2-piece wheels (F:21x9.5, R:21x12) on P-Zero tires (F:285/30, R:325/30), 15% tint (side & back), 35% tint (entire windshield), Oracle LED Sidemmarkers
01-21-2014, 11:58 PM #16
You can run NT05R 315 on stock wheels, I ran TOYO R888 285/35/20 same size as stock tires but 0.3" wider and has a great traction to keep your beast on the road. i highly recommend TOYO R888 if you have stock wheels.------------------------------------------------------------------------------------------------------------
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01-22-2014, 01:39 AM #172015 Mustang GT 50th, WW with Automatic on order
2014 DIB with Red Stripe GT500, all but glass roof.
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01-22-2014, 04:30 AM #18
I went with 295 vorti tires on my setup. Not a popular ootion on these boards it seems like bit in very imoressed with them so farGo like hell!!!
01-22-2014, 04:46 AM #19
01-22-2014, 08:44 AM #20
01-23-2014, 09:40 AM #21
295's look great on my stock rims, but I have to concur no how no way should you go any bigger.2013 GT500, DIB/White
FRPP Resonator Delete
Redline hood struts
MPSS all around
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02-03-2014, 12:01 AM #22