31X10.5X15 on a 15X8 wheel? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

shuttermutt · 01-05-2004, 11:30 PM

Okay, there seems to be a bit of conflicting information regarding the 31X10.5X15 combo on 15X8 wheels. Some folks say, "Go ahead! No problems at all!" Others say, "Hmmm... you can do it, but I don't think it's a good idea!" Still others say, "Nope! It doesn't work!"

So what's the verdict, guys? Can I shoe a 15X8 wheel with 31X10.5X15 tires? I want a fairly aggressive tire that really fills the wheel well and I don't want a goofy 20-inch, $1,000 billet wheel in there. It's a truck, dammit!

PS: No offense to those that run giant wheels and rubber band tires. You do your thing and I'll do mine!

shuttermutt · 01-05-2004, 11:31 PM

While we're at it, is there a list of the factory wheels that will fit the 6-lug pattern? If I'm not mistaken, the 6-lug wheels on the 73-87 4X4s will work. Also, the 6-lug wheels on some older Nissan and newer Toyota 4X4s will fit, too. Does anyone have a complete list?

**Stocker** · 01-05-2004, 11:34 PM

Sure sounds like a perfect match to me! Probably more info at www.tirerack.com. General rule of thumb, tread width should be similar to (or 1" wider than) rim width. 10.50 tires go on 8" rims; 12.50 tires go on 10" rims.

shuttermutt · 01-06-2004, 12:09 AM

Is that what you're running, Stocker? Got pics?

lukecp · 01-06-2004, 12:12 AM

One of my friends put some 31x10.50's on a set of 15x10's on his 4x4. They looked pretty ballooned on the rims....were too big for a 10" rim. I think a 8" rim would have looked much better....you should be fine

padreisla · 01-06-2004, 12:14 AM

Shuttermutt, when I first bought my 67 c20 it had a set of 31X10.5X15 tires on 15X8's wheels in front and the 31X10.5X15 tires on 15X10's wheels in the back. The only reason I removed them was that I wanted a new set tire/wheel setup. I bought the truck from my brother and he used the truck for quite awhile with that setup and did not have any problems at all. I went to a different tire size, but that is because I dropped the front 3" and the back 4". As a matter of fact I still have the old tire/wheel setup as a backup option.

Joey

shuttermutt · 01-06-2004, 12:43 AM

Cool. Sounds like the combo will work just fine from what I'm hearing. I just didn't want to do anything totally unsafe. Thanks for the input, guys. Anybody with nothing better to do than to post pics of trucks with this combo would get a big "thanks" from me. I know there's a couple of pics floating around, but I can never seem to find them again.

7d14xfun · 01-06-2004, 12:46 AM

I have 31x10.5x15's BFG Long trail's mounted on Eagle 589 15x8's. Absolutley love them. No problem with fitting or rubbing whatsoever.

7d14xfun · 01-06-2004, 12:49 AM

Having trouble posting my pics for some reason.

shuttermutt · 01-06-2004, 12:52 AM

Awesome! Now, does anybody care to take a stab at the second question? The steel wheels I'm running are beyond repair and can't be balanced properly. I'm hesitant to have new tires mounted on 'em and I'm very hesitant to get the living crud shook outta me on a 1,700 mile trip West in a couple of weeks.

I'd like to find a set of replacements, but the salvage yards up here won't talk to you unless you're VERY specific on what you want. Knowing what will fit could save me some time as I browse for potential replacements.

**Stocker** · 01-06-2004, 01:46 AM

Quote:

Originally posted by shuttermutt
Is that what you're running, Stocker? Got pics?

Currently running 33-12.50/16.5 tires on 9.75" rims....
No decent pics, just the avatar.

Paul72 · 01-06-2004, 01:57 AM

The K/20 had 31X10.5's on a 16.5" wheel. Might go to 33's when it's back together. My Blazer has 31X10.5's on a 15X8 wheel.

Can't seem to post pics at the moment - I'll try again later.

cheyenne10 · 01-06-2004, 02:26 AM

My assumption is any tire store around would recommend that exact match for wheel and tire combo. I even have seen... 35x12.50x15's in 8" ralley wheels. I also have a set of 235/70/15's stretched onto 8" wheels. Quite the variety but what you want is perfect medium.

72 CustomCamper · 01-06-2004, 03:18 AM

When wew bought our 84 truck new, it had 31x10.50's on 8" rims from the factory. On my toyota i'm running 31x10.50's on a 7" rim. On #2 question, Most any 6 lug wheel except for dodge 6 lugs will fit the bolt pattern. On the import wheels you might have problems with not enough backspacing if you have disk brakes...

Chuck

Rooster's 67 · 01-06-2004, 03:31 AM

73-87 chevy ralley or plain wheels off of a 4X4 fit the 6 bolt pattern perfectly.

doughby82 · 01-06-2004, 03:44 AM

this is off of the main page should help you out shuddermut
http://67-72chevytrucks.com/techtips/other/other_4.html

Southpa · 01-06-2004, 06:23 AM

I have a pic right here of my truck from 4 years back, it was right after I replaced a bedside. I tried posting the pic but error message jumped up. I'll bet everytime someone tries to post a pic Josh will get an email about it. Sorry J, I tried about 3 or 4 times,

.

Anyway, the tires are 31X10.5X15 Michelins on 15X8 rims (6 lug). Good fit, no problems. When I swapped front ends 2 yrs ago (1970 drum to 1971 disc) I had to get new 5 lug rims. The guy down at Big-O Tires (won't deal w/ them again, way too pricey) said the 15X8 were out of stock and he assured me that 15X7 would be ok for my tires. I guess he was right, its been two years and there have been no problems. Inflated to about 42 lbs, no uneven wear, smooth ride.

I'll try to get my pic into this thread tomorrow.

**JIMs70GMC** · 01-06-2004, 08:10 AM

Had an 85 blazer that came with 31-10.5R15s on 15x8 rims from the factory.

JayDubBlazer · 01-06-2004, 09:20 AM

On the bfgoodrich page they have 7-9 inches as a recommended size

FRENCHBLUE72 · 01-06-2004, 11:13 AM

I have 35x13.50's and 32x11.50 on 10 inch wheel's and the both look good.. I would say rum em..

pickupman · 01-06-2004, 12:30 PM

I run 32X11.50 on all my 4wds with factory rallies. I have used this combo for 15 tears or more without any problems.
Bill

fishead · 01-06-2004, 12:52 PM

Long story made short.

I ran 15 x 8 wheels from the mid 70s on my 72 and 70 trucks. They worked fine for me.

I also ran 31x10.5x15's on said 15 x 8, 5 lugs on the 1972 C10.

No problems, and I really liked the ride and feel of the larger tires.

Go for it!

**Palf70Step** · 01-06-2004, 03:16 PM

My 96 is running 31x10.50 x15 on 8" wheels. I think it is a perfect combo. I am not running on my 70 step now, but they fit just fine. No rubbing or other issues came up. It's a great combo for any truck far as I am concerned.

Southpa · 01-06-2004, 05:07 PM

I forgot I had pics right here. These are from the day after I bought my tires.

http://67-72chevytrucks.com/tc1970_4.html

mooneyes · 01-06-2004, 08:25 PM

..i had an 87 blazer with stock 8" ralleys and i put 32/11.50's on them with very little sidewall bulge

01-05-2004, 11:30 PM	#1
shuttermutt Don't say "Oops!", Doctor Join Date: Nov 2003 Location: Houston, TX Posts: 677	31X10.5X15 on a 15X8 wheel? Okay, there seems to be a bit of conflicting information regarding the 31X10.5X15 combo on 15X8 wheels. Some folks say, "Go ahead! No problems at all!" Others say, "Hmmm... you can do it, but I don't think it's a good idea!" Still others say, "Nope! It doesn't work!" So what's the verdict, guys? Can I shoe a 15X8 wheel with 31X10.5X15 tires? I want a fairly aggressive tire that really fills the wheel well and I *don't* want a goofy 20-inch, $1,000 billet wheel in there. It's a truck, dammit! PS: No offense to those that run giant wheels and rubber band tires. You do your thing and I'll do mine! __________________ 'Mutt 1968 CST LWB: R.I.P. 1967 Chevelle: TPI 454 beast 1967 C10 SWB: Claimed when Bumpster didn't put it on his list

01-05-2004, 11:34 PM	#3
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,692	Sure sounds like a perfect match to me! Probably more info at www.tirerack.com. General rule of thumb, tread width should be similar to (or 1" wider than) rim width. 10.50 tires go on 8" rims; 12.50 tires go on 10" rims. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

01-06-2004, 12:09 AM	#4
shuttermutt Don't say "Oops!", Doctor Join Date: Nov 2003 Location: Houston, TX Posts: 677	Is that what you're running, Stocker? Got pics? __________________ 'Mutt 1968 CST LWB: R.I.P. 1967 Chevelle: TPI 454 beast 1967 C10 SWB: Claimed when Bumpster didn't put it on his list

01-06-2004, 12:12 AM	#5
lukecp Formerly yellow72custom Join Date: May 2001 Location: Austin, TX Posts: 7,531	One of my friends put some 31x10.50's on a set of 15x10's on his 4x4. They looked pretty ballooned on the rims....were too big for a 10" rim. I think a 8" rim would have looked much better....you should be fine __________________ '72 Chevy C10 Mild 350/TH350/3.07. Ochre/White. Old high school ride. '70 GMC C2500 '62 327 4bbl/SM465/4.56-geared Dana 60. White/White. Project or parts truck. '97 Saturn SL DD. 1.9/5-speed. 40+ highway mpg

01-06-2004, 12:14 AM	#6
padreisla Registered User Join Date: Jan 2003 Location: Tampa, Florida Posts: 141	Tire/Wheel Setup Shuttermutt, when I first bought my 67 c20 it had a set of 31X10.5X15 tires on 15X8's wheels in front and the 31X10.5X15 tires on 15X10's wheels in the back. The only reason I removed them was that I wanted a new set tire/wheel setup. I bought the truck from my brother and he used the truck for quite awhile with that setup and did not have any problems at all. I went to a different tire size, but that is because I dropped the front 3" and the back 4". As a matter of fact I still have the old tire/wheel setup as a backup option. Joey __________________ 67 C20 LWB 454 BB THD 400 97 Jeep Wrangler 4cyl 5sp

01-05-2004, 11:31 PM	#2
shuttermutt Don't say "Oops!", Doctor Join Date: Nov 2003 Location: Houston, TX Posts: 677	While we're at it, is there a list of the factory wheels that will fit the 6-lug pattern? If I'm not mistaken, the 6-lug wheels on the 73-87 4X4s will work. Also, the 6-lug wheels on some older Nissan and newer Toyota 4X4s will fit, too. Does anyone have a complete list? __________________ 'Mutt 1968 CST LWB: R.I.P. 1967 Chevelle: TPI 454 beast 1967 C10 SWB: Claimed when Bumpster didn't put it on his list

01-06-2004, 12:43 AM	#7
shuttermutt Don't say "Oops!", Doctor Join Date: Nov 2003 Location: Houston, TX Posts: 677	Cool. Sounds like the combo will work just fine from what I'm hearing. I just didn't want to do anything totally unsafe. Thanks for the input, guys. Anybody with nothing better to do than to post pics of trucks with this combo would get a big "thanks" from me. I know there's a couple of pics floating around, but I can never seem to find them again. __________________ 'Mutt 1968 CST LWB: R.I.P. 1967 Chevelle: TPI 454 beast 1967 C10 SWB: Claimed when Bumpster didn't put it on his list

01-06-2004, 12:46 AM	#8
7d14xfun Registered User Join Date: Aug 2003 Location: CT Posts: 93	I have 31x10.5x15's BFG Long trail's mounted on Eagle 589 15x8's. Absolutley love them. No problem with fitting or rubbing whatsoever. __________________ 1971 Chevy K10 Stepside 1999 Chevy Silverado 4x4

01-06-2004, 12:49 AM	#9
7d14xfun Registered User Join Date: Aug 2003 Location: CT Posts: 93	Having trouble posting my pics for some reason. __________________ 1971 Chevy K10 Stepside 1999 Chevy Silverado 4x4

01-06-2004, 12:52 AM	#10
shuttermutt Don't say "Oops!", Doctor Join Date: Nov 2003 Location: Houston, TX Posts: 677	Awesome! Now, does anybody care to take a stab at the second question? The steel wheels I'm running are beyond repair and can't be balanced properly. I'm hesitant to have new tires mounted on 'em and I'm very hesitant to get the living crud shook outta me on a 1,700 mile trip West in a couple of weeks. I'd like to find a set of replacements, but the salvage yards up here won't talk to you unless you're VERY specific on what you want. Knowing what will fit could save me some time as I browse for potential replacements. __________________ 'Mutt 1968 CST LWB: R.I.P. 1967 Chevelle: TPI 454 beast 1967 C10 SWB: Claimed when Bumpster didn't put it on his list

01-06-2004, 01:57 AM	#12
Paul72 Registered User Join Date: Sep 2003 Location: Waterloo, IA Posts: 1,147	The K/20 had 31X10.5's on a 16.5" wheel. Might go to 33's when it's back together. My Blazer has 31X10.5's on a 15X8 wheel. Can't seem to post pics at the moment - I'll try again later. __________________ '72 Chevy K20 - 383/4sp/205 - SOLD after 41 years in the family Next project - K/5 Tahoe (71 Blazer on 99 Tahoe chassis) Build thread: http://67-72chevytrucks.com/vboard/s...d.php?t=789958

01-06-2004, 02:26 AM	#13
cheyenne10 Senior Member Join Date: Apr 2000 Location: Oregon Posts: 2,512	perfect fit My assumption is any tire store around would recommend that exact match for wheel and tire combo. I even have seen... 35x12.50x15's in 8" ralley wheels. I also have a set of 235/70/15's stretched onto 8" wheels. Quite the variety but what you want is perfect medium. __________________ Bob

01-06-2004, 03:18 AM	#14
72 CustomCamper huh ??? Join Date: Nov 2002 Location: Fredericksburg,Va. Posts: 3,369	When wew bought our 84 truck new, it had 31x10.50's on 8" rims from the factory. On my toyota i'm running 31x10.50's on a 7" rim. On #2 question, Most any 6 lug wheel except for dodge 6 lugs will fit the bolt pattern. On the import wheels you might have problems with not enough backspacing if you have disk brakes... Chuck __________________ 90 Blazer Silverado 350w/ 700R4 and 32" Kelly's "I am a bomb technician. If you see me running try to keep up!"

01-06-2004, 03:31 AM	#15
Rooster's 67 Registered User Join Date: Sep 2003 Location: DFW Posts: 765	73-87 chevy ralley or plain wheels off of a 4X4 fit the 6 bolt pattern perfectly. __________________ The problem with America is stupidity. I'm not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself?

01-06-2004, 03:44 AM	#16
doughby82 Registered User Join Date: Mar 2001 Location: springfield ill Posts: 836	this is off of the main page should help you out shuddermut http://67-72chevytrucks.com/techtips/other/other_4.html __________________ springfield illinois 2003 custom (harley)built from scratch 68 swb Last edited by doughby82; 01-07-2004 at 01:52 AM.



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01-06-2004, 06:23 AM	#17
Southpa Registered User Join Date: May 2000 Location: Victoria, BC, Canada Posts: 2,410	I have a pic right here of my truck from 4 years back, it was right after I replaced a bedside. I tried posting the pic but error message jumped up. I'll bet everytime someone tries to post a pic Josh will get an email about it. Sorry J, I tried about 3 or 4 times, . Anyway, the tires are 31X10.5X15 Michelins on 15X8 rims (6 lug). Good fit, no problems. When I swapped front ends 2 yrs ago (1970 drum to 1971 disc) I had to get new 5 lug rims. The guy down at Big-O Tires (won't deal w/ them again, way too pricey) said the 15X8 were out of stock and he assured me that 15X7 would be ok for my tires. I guess he was right, its been two years and there have been no problems. Inflated to about 42 lbs, no uneven wear, smooth ride. I'll try to get my pic into this thread tomorrow. __________________ 1970 GMC 1500 Custom Original 350/TH350 Victoria, BC, Canada You can wish in one hand and crap in the other. See which one gets filled first.

01-06-2004, 08:10 AM	#18
JIMs70GMC user # 2756 Join Date: Jun 2001 Location: Chesapeake, Virginia Posts: 4,612	Had an 85 blazer that came with 31-10.5R15s on 15x8 rims from the factory. __________________ 1970 K25, 8' stepside bed 350/465/205 44 up front, 60 in the rear 4.10s rolling on 33" Dunlop MTs 1986 K5, 350/465/208 Dana 60/14 bolt from a cucv 36" Super Swampers TSL/SX 1983 K20 w/ CUCV axles, 350/700R4/208 sitting on 37" Goodyears 1986 M1031 6.2 diesel, TH400/NP205 locker in the rear and a LS in the front, all stock for now..... 1986 K30, 350/400/205 dana 60 and 14 bolt. I kept the drivetrain. Body/bad and chassis are gone. 1981 K30, 350/465/205 dana 60 and dually 14 bolt. Has a G80, and a flat bed. Going to replace the flat bed. 1985 K20, 350/400/208 10 bolt and SF 14 bolt. I wonder where I can find some 1 tons. Hmmmmm

01-06-2004, 09:20 AM	#19
JayDubBlazer go cyclones Join Date: Jun 2003 Location: Ames, IA Posts: 1,885	On the bfgoodrich page they have 7-9 inches as a recommended size __________________ Wes PROJECT OLE GREEN 1972 Blazer 4X4 350/700R4 2017 Silverado LT

01-06-2004, 11:13 AM	#20
FRENCHBLUE72 PROJECT 7DEUCE Join Date: Dec 2002 Location: GRANTS PASS OR Posts: 21,608	I have 35x13.50's and 32x11.50 on 10 inch wheel's and the both look good.. I would say rum em.. __________________ GO BIG GREEN GO DUCKS MEMBER #6377 72 k-5 daily driver 6'' lift 35'' 350-350-205 slowly getting rust free. Project "7DEUCE" check out my build http://67-72chevytrucks.com/vboard/s...d.php?t=267665 Tim Powell..R.I.P EastSideLowlife..... R.I.P..

01-06-2004, 12:30 PM	#21
pickupman Registered User Join Date: Dec 2000 Location: Greeneville, TN Posts: 3,097	I run 32X11.50 on all my 4wds with factory rallies. I have used this combo for 15 tears or more without any problems. Bill __________________ atheystruck@comcast.net 67 1/2 ton 4wd custom cab 72 1/2 ton 4wd super cheyenne 71 1/2 BB super cheyenne shortbed

01-06-2004, 12:52 PM	#22
fishead Registered User Join Date: Sep 2002 Location: Spring Hill KS Posts: 85	Wheels and Tires Long story made short. I ran 15 x 8 wheels from the mid 70s on my 72 and 70 trucks. They worked fine for me. I also ran 31x10.5x15's on said 15 x 8, 5 lugs on the 1972 C10. No problems, and I really liked the ride and feel of the larger tires. Go for it!

01-06-2004, 03:16 PM	#23
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,083	My 96 is running 31x10.50 x15 on 8" wheels. I think it is a perfect combo. I am not running on my 70 step now, but they fit just fine. No rubbing or other issues came up. It's a great combo for any truck far as I am concerned. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God!

01-06-2004, 05:07 PM	#24
Southpa Registered User Join Date: May 2000 Location: Victoria, BC, Canada Posts: 2,410	I forgot I had pics right here. These are from the day after I bought my tires. http://67-72chevytrucks.com/tc1970_4.html __________________ 1970 GMC 1500 Custom Original 350/TH350 Victoria, BC, Canada You can wish in one hand and crap in the other. See which one gets filled first.

01-06-2004, 08:25 PM	#25
mooneyes Registered User Join Date: Jan 2002 Location: Slippery Rock PA USA Posts: 1,692	..i had an 87 blazer with stock 8" ralleys and i put 32/11.50's on them with very little sidewall bulge __________________ Ken Lyons, Slippery rock pa 68 short step 327 t10 4 gear 72 2wd blazer project 70 lwb 305/700r driver 78 caprice project 02 cavalier D.D ( hate it!!)

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