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Author
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Topic: Max Tires for 15x8 Wheels
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moncrief
Journeyman Posts: 13
From: Lake Ridge, Virginia, CSA
Registered: Jun 2001
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posted 06-16-2001 08:48 PM
   
I bought 15x8 Magnum 500s for my '71 convertible and will soon purchase tires. The place where I bought the wheels recommends no larger that 235-60 tires but I'm thinking of something taller and wider for the rear, am willing to do a slight lift if necessary. Any tire experts with advice on the largest size tires I can mount on these wheels? Thanks.
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SteveLaRiviere
Administrator Posts: 14658
From: Saco, Maine MCA # 47773
Registered: May 99
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posted 06-16-2001 09:01 PM
My truck has 15x8 Cragar S/S wheels with 275/60/15 BFG T/A radials and they sit fine.I was thinking that I could have even gone with 295/60/15s. ------------------
'70 Mustang Mach 1 M code 351C 4V/FMX/3.50 open
'72 Mustang Sprint Coupe 351C 4V/FMX/4.30 Trac Lok
'94 F-150 XL 5.8L/E4OD/3.55 Limited Slip
'97 Probe GTS 2.5L DOHC {Wife's car...}
All Fords since 1977
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kcode
Gearhead Posts: 1393
From: alvaton,ky,usa Suburb of Bowling Green, M&M #79, MCA #29208
Registered: Jun 99
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posted 06-17-2001 12:32 AM
Pay a visit to your local BF Goodrich dealer, they used to have a small brochure that list all of their tire sizes and recommended rim sizes. Good reference information.  By the way, welcome to Mustangsandmore... Mike [This message has been edited by kcode (edited 06-17-2001).]
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lyle29464
Gearhead Posts: 226
From: Mt. Pleasant S.C. C. S. A.
Registered: Mar 2000
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posted 06-17-2001 02:08 AM
LOL love the CSA in your address Lyle
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richard bohm
Gearhead Posts: 176
From:
Registered: May 2001
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posted 06-17-2001 03:31 AM
a 275/50 would fit your wheel just fine. i wouldnt go bigger than that though.
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moncrief
Journeyman Posts: 13
From: Lake Ridge, Virginia, CSA
Registered: Jun 2001
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posted 06-18-2001 06:39 AM
Thanks for your sage advice. I plan to have some new tires by the end of the week.
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68 S-code GT
Gearhead Posts: 224
From: South River, NJ, US
Registered: Mar 2000
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posted 06-18-2001 07:19 AM
What kind of offset does the rim have?------------------
68 S-code FB GT 4spd/3.25 PS PDB
68 J-code Cp Sprint"B" C4/3.00 PDB PS AC
99 F150 XLT Ext/cab, 4X4, 5.4L, 3.55LS
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JAAZZY
Gearhead Posts: 183
From: Bay Area, CA
Registered: Apr 2001
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posted 06-18-2001 03:50 PM
I don't think you'll find a tire manufacturer or shop that would recommend more than a a 245 for an 8" wheel(at least for a car tire). The reason is that the wheel size changes the location where a tire takes load and stress. The manufacturer designs it to perform to the advertised levels only with the appropriate wheel size. In normal street driving it is possible that it would never make a difference. Under high stress and heat it could result in a tire failure. Your best bet is to call the tire company directly for the brand you are interested in. They might have the detailed info you need. quote:
Originally posted by moncrief:
I bought 15x8 Magnum 500s for my '71 convertible and will soon purchase tires. The place where I bought the wheels recommends no larger that 235-60 tires but I'm thinking of something taller and wider for the rear, am willing to do a slight lift if necessary. Any tire experts with advice on the largest size tires I can mount on these wheels? Thanks.
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Bob Hopkins
Journeyman Posts: 43
From: BRIDGEPORT NJ USA
Registered: Jan 2001
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posted 06-18-2001 03:54 PM
I just coppied this out of BFG's web page tire spects/sizes recomendations
Size
Serv. Desc.
Load Rating UTQG Max
Load Max.
Inflation
Press. Tread
Depth Rim
Width
Range Meas.
Rim
Width Sect.
Width Tread
Width Overall
Diam. Revs
Per
Mile BFGoodrich Radial T/A
175/70SR13 ?82S ? ?SL ?RWL ?280 A C 1036lbs. 35psi 12/32nds 4.5-6" 5" 6.9" 5.2" 22.6" 920
195/60SR13 ?83S ? ?SL ?RWL ?360 A B 1080lbs. 35psi 11/32nds 5-7.5" 6" 7.9" 6.3" 22.2" 937
205/60SR13 ?86S ? ?SL ?RWL ?360 A B 1179lbs. 35psi 11/32nds 5.5-8" 6" 8.2" 6.6" 22.7" 916
215/50SR13 ?84S ? ?SL ?RWL ?360 A B 1091lbs. 35psi 11/32nds 6-8.5" 7" 8.9" 7" 21.5" 957
185/70SR14 ?87S ? ?SL ?RWL ?400 A B 1201lbs. 35psi 12/32nds 4.5-6.5" 5.5" 7.4" 5.5" 24.3" 856
195/60SR14 ?85S ? ?SL ?RWL ?400 A B 1135lbs. 35psi 11/32nds 5-7.5" 6" 7.9" 6.3" 23.2" 897
195/70SR14 ?90S ? ?SL ?RWL ?320 A C 1312lbs. 35psi 12/32nds 5-7" 6" 7.9" 5.8" 24.7" 842
205/70SR14 ?93S ? ?SL ?RWL ?400 A B 1433lbs. 35psi 12/32nds 5.5-7.5" 6" 8.1" 6.1" 25.2" 825
215/60SR14 ?91S ? ?SL ?RWL ?400 A B 1345lbs. 35psi 11/32nds 5.5-8.5" 6.5" 8.7" 7" 24.2" 860
215/70SR14 ?96S ? ?SL ?RWL ?400 A B 1554lbs. 35psi 12/32nds 5.5-7.5" 6.5" 8.6" 6.4" 25.8" 806
225/60SR14 ?94S ? ?SL ?RWL ?400 A B 1455lbs. 35psi 11/32nds 6-9" 6.5" 9" 7.2" 24.7" 842
225/70SR14 ?98S ? ?SL ?RWL ? 1675lbs. 35psi 12/32nds 6-7.5" 6.5" 9" NA 26.5" 785
235/60SR14 ?96S ? ?SL ?RWL ?400 A B 1565lbs. 35psi 11/32nds 6-9" 7" 9.5" 7.6" 25.1" 820
245/50SR14 ?93S ? ?SL ?RWL ?400 A B 1433lbs. 35psi 11/32nds 7-9.5" 7.5" 10" 8" 23.7" 878
245/60SR14 ?98S ? ?SL ?RWL ?400 A B 1675lbs. 35psi 11/32nds 6.5-9.5" 7" 9.8" 8" 25.6" 813
265/50SR14 ?98S ? ?SL ?RWL ?400 A B 1642lbs. 35psi 11/32nds 7.5-10" 8.5" 10.9" 8.6" 24.5" 849
195/60SR15 ?87S ? ?SL ?RWL ?400 A B 1190lbs. 35psi 11/32nds 5-7.5" 6" 7.9" 6.3" 24.2" 860
205/55SR15 ?87S ? ?SL ? ?380 A B 1201lbs. 35psi 11/32nds 6-8" 6.5" 8.4" 6.6" 23.9" 870
205/60SR15 ?90S ? ?SL ?RWL ?400 A B 1301lbs. 35psi 11/32nds 5.5-8" 6" 8.2" 6.6" 24.7" 842
215/60SR15 ?93S ? ?SL ?RWL ?400 A B 1411lbs. 35psi 11/32nds 6-8.5" 6.5" 8.7" 7" 25.2" 825
215/65SR15 ?95S ? ?SL ?RWL ?400 A B 1510lbs. 35psi 11/32nds 5.5-7.5" 6.5" 8.7" 7" 26" 800
215/70SR15 ?97S ? ?SL ?RWL ?400 A B 1620lbs. 35psi 12/32nds 5.5-7.5" 6.5" 8.6" 6.4" 26.8" 776
225/60SR15 ?95S ? ?SL ?RWL ?400 A B 1521lbs. 35psi 11/32nds 6-9" 6.5" 9" 7.2" 25.6" 813
225/70SR15 ?100S ? ?SL ?RWL ?400 A B 1753lbs. 35psi 12/32nds 6-8" 6.5" 8.9" 6.7" 27.3" 762
235/60SR15 ?98S ? ?SL ?RWL ?400 A B 1642lbs. 35psi 11/32nds 6-9" 7" 9.5" 7.6" 26.1" 797
235/70SR15 ?102S ? ?SL ?RWL ?400 A B 1896lbs. 35psi 12/32nds 6-8.5" 7" 9.3" 7" 27.8" 748
245/60SR15 ?100S ? ?SL ?RWL ?400 A B 1753lbs. 35psi 11/32nds 6.5-9.5" 7" 9.8" 8" 26.6" 782
255/60SR15 ?102S ? ?SL ?RWL ?400 A B 1885lbs. 35psi 11/32nds 6.5-10" 7.5" 10.2" 8.2" 27.1" 768
255/70SR15 ?108S ? ?SL ?RWL ?400 A B 2183lbs. 35psi 12/32nds 6.5-9" 7.5" 10.1" 7.6" 28.9" 720
265/50SR15 ?99S ? ?SL ?RWL ?400 A B 1720lbs. 35psi 11/32nds 7.5-10" 8.5" 10.9" 8.6" 25.5" 816
275/50SR15 ?101S ? ?SL ?RWL ?400 A B 1830lbs. 35psi 11/32nds 7.5-11" 8.5" 11.2" 8.9" 25.9" 803
275/60SR15 ?107S ? ?SL ?RWL ?400 A B 2149lbs. 35psi 11/32nds 7-11" 8" 11" 8.9" 28" 743
285/70SR15 ?115S ? ?SL ?RWL ?400 A B 2679lbs. 35psi 12/32nds 7.5-9" 8.5" 11.5" 8.5" 30.8" 675
295/50SR15 ?105S ? ?SL ?RWL ?400 A B 2061lbs. 35psi 11/32nds 8-11" 9.5" 12.2" 9.5" 26.7" 779
195/50SR16 ?83S ? ?SL ? ?400 A B 1074lbs. 35psi 11/32nds 5-7.5" 6" 7.9" 6.3" 23.7" 878
205/50SR16 ?86S ? ?SL ? ?400 A B 1168lbs. 35psi 11/32nds 5.5-8" 6.5" 8.4" 6.6" 24.1" 863
205/55SR16 ?89S ? ?SL ? ?400 A B 1279lbs. 35psi 11/32nds 6-8" 6.5" 8.4" 6.6" 24.9" 835
225/50SR16 ?91S ? ?SL ? ?400 A B 1367lbs. 35psi 11/32nds 6-9" 7" 9.2" 7.2" 24.9" 835
245/50SR16 ?96S ? ?SL ? ?380 A B 1576lbs. 35psi 11/32nds 7-9.5" 7.5" 10" 8" 25.7" 809
265/50SR16 ?101S ? ?SL ? ?400 A B 1797lbs. 35psi 11/32nds 7-9.5" 8.5" 10.9" 8.6" 26.5" 785
275/65SR16 ?111S ? ?SL ?RWL ?400 A B 2403lbs. 35psi 10/32nds 7.5-9" 8" 11" 8.9" 30.1" 691
295/50SR16 ?107S ? ?SL ? ?400 A B 2149lbs. 35psi 11/32nds 8-11" 9.5" 12.2" 9.5" 27.6" 754
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TomP
Moderator Posts: 2375
From: Delta BC Canada
Registered: Dec 99
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posted 06-18-2001 06:23 PM
a 275 section width tire fits just hunky-dory on an 8" rim. It will even fit on a 7" rim too. Where you want a wider rim is for very low profile tires and for max cornering grip... actually i have 225/50-16's mounted on 9 wide rims for my Ranger...i mounted them by hand too  it was tough to get air in them!
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Moneymaker
Administrator Posts: 8514
From: Lyons, IL, USA
Registered: May 99
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posted 06-18-2001 07:43 PM
We install P-255's on 15x8 wheels regularly with great results. ------------------
Alex Denysenko
Co-Administrator and Moderator
NHRA/IHRA/SRA member
NHRA and IHRA SS/LA National Record Holder '00 & '01
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link
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JAAZZY
Gearhead Posts: 183
From: Bay Area, CA
Registered: Apr 2001
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posted 06-19-2001 12:20 AM
Guys I know the tires fit. It was just my understanding that it is not recommended. Every time I purchased performance tires I remember asking about this and they always gave me a maximum size for the tire. Maybe it's because I've always purchased low profile performance tires.
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moncrief
Journeyman Posts: 13
From: Lake Ridge, Virginia, CSA
Registered: Jun 2001
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posted 06-19-2001 09:03 PM
I went to the B.F. Goodrich website after kcode mentioned it. Good info there. Saw that the Goodrich 295-65 Street-Strip tires will fit my 15x8 wheels... Hmmm. We'll see. I should have my 71 M-code convertible ready for a photo session in the next three weeks and will post it. Thanks for all the info and advice. This is about the best gear head website I've seen.------------------
1971 Mustang Convertible
351 4v, Hurst 4-spd
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richard bohm
Gearhead Posts: 176
From:
Registered: May 2001
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posted 06-20-2001 04:48 AM
for a proper fit the wheel should be 80% the width of the tire minimum(industry standard).
a 275 width tire is 10.8 inches wide and will fit nicely on an 8" wide wheel.
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moncrief
Journeyman Posts: 13
From: Lake Ridge, Virginia, CSA
Registered: Jun 2001
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posted 06-23-2001 06:15 PM
A closing note here on my tire quest. I put 275x60 Dunlop GT Qualifiers on the back, 255x60 on the front. No rubbing anywhere, looks like I could have gone with the 295x60 on the back and maybe even a 295x65. The 15x8 wheels are plenty big enough, per the Goodrich website. The change in the appearance of the car is unreal and the cornering is much improved (of course). Now for the mill... ------------------
1971 M-Code Convertible, 351 4v, Hurst 4-spd, Posi-Traction, Ram Air Hood, Disk Brakes, 275x60 GT Qualifiers, Gauge Package [This message has been edited by moncrief (edited 06-23-2001).]
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