I have a fat tire! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

chuckmc8 · 05-22-2009, 03:04 PM

I guess its kinda of a combo that I have to adjust- There was no way to tell w/o getting the truck together, but the front tires rub, so I need opinions as to which way to go.
The tires are 255/70 and the rim is 9" wide (I had them widened) The truck has 2 1/2" Drop spindles and 1 coil removed from the front spring. (rear has neg 5" springs)
Looks like the alternatives would be to change to a 7" wide rallye and narrower tire or to buy a lower profile tire and keep the 9" rims. I think a 255/50 would be a few inches shorter than the 255/70, but would be unfortunate to buy and put them on and still rub. Or I could put a stock pair of springs back on the front and raise it up a bit.
Or would the 7" combo be better?

cdowns · 05-22-2009, 03:12 PM

i think a 235x70 with 7"rim 4"backspace would do fine

**michael bustamante** · 05-22-2009, 03:16 PM

you swapped to 5 lug right? it look s like what happened is that the conversion stuck your rims out about an inch on each side. Im running the same wheel/tire set up you are (15x8) and Mine barely clear if I lower my front end if I were to lower that much, but I havent converted to 5 lug disc yet. The other guy will chime in too if im wrong
oh and we need more pics! nice truck!

UltraBlue71 · 05-22-2009, 03:29 PM

Might try the springs first, sounds like the cheapest solution to me, looks like that might give it just enuff room.

lowriden58 · 05-22-2009, 03:34 PM

IMHO i think the 7" wheels with a smaller tire would look best. right now it looks south of the border

ap2002 · 05-22-2009, 06:54 PM

i went from a 275/60/15 to a 245/60/15 and took care of that problem, this was on 15x8 wheels...

huge difference....

chuckmc8 · 05-30-2009, 08:01 PM

Changed tires out today and heres pics, went to 235/60R15 on fronts

big_al_71 · 05-30-2009, 08:11 PM

much better

Love that color blue...

66skylarkpost · 05-30-2009, 09:15 PM

a 235 tire on a 9 inch wheel ? you better take turns carefully ,dont want to blow a bead

68C15 · 05-30-2009, 09:51 PM

when my truck was that low I had 255/70-15's on 7" wheels. it filled the well nicely and didn't rub.

chuckmc8 · 05-30-2009, 09:54 PM

"a 235 tire on a 9 inch wheel ? you better take turns carefully ,dont want to blow a bead"

Goodrich specs 235 to 8.5" wheel, so I am not sweating the 1/2" extra

chevychase · 05-31-2009, 12:43 AM

Did the new tires take care of the rubbing?

jim zag · 05-31-2009, 06:37 AM

I have 235 70 15 tires on 7 inch rims. It looks like you need more backspacing to pull the tires back inside the wheelwells.

prairewolf · 05-31-2009, 06:47 AM

there is a member north of me a ways that had a whole case of them. but that was a couple weeks ago so who knows now, ....

just tryin funny.

life is good.kent

68C15 · 05-31-2009, 06:56 AM

actually 9 blocks north and 12 blocks east to be exact Kent.

*67chevy3/4tontruck* · 05-31-2009, 09:10 AM

Be carefully when you turn with the 235 tire on a 9 inch wheel

PanelDeland · 05-31-2009, 12:14 PM

http://www.dakota-truck.net/TIRECALC/

http://www.miata.net/garage/tirecalcold.html

This may help determine if tires will work out your problem.

05-22-2009, 03:04 PM	#1
chuckmc8 It's alsways something..... Join Date: Nov 2008 Location: Douglasville GA Posts: 1,171	I have a fat tire! I guess its kinda of a combo that I have to adjust- There was no way to tell w/o getting the truck together, but the front tires rub, so I need opinions as to which way to go. The tires are 255/70 and the rim is 9" wide (I had them widened) The truck has 2 1/2" Drop spindles and 1 coil removed from the front spring. (rear has neg 5" springs) Looks like the alternatives would be to change to a 7" wide rallye and narrower tire or to buy a lower profile tire and keep the 9" rims. I think a 255/50 would be a few inches shorter than the 255/70, but would be unfortunate to buy and put them on and still rub. Or I could put a stock pair of springs back on the front and raise it up a bit. Or would the 7" combo be better? Attached Images

05-22-2009, 03:12 PM	#2
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: I have a fat tire! i think a 235x70 with 7"rim 4"backspace would do fine __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

05-22-2009, 03:16 PM	#3
michael bustamante Senior Member Join Date: Sep 2007 Location: Albuquerque NM Posts: 7,848	Re: I have a fat tire! you swapped to 5 lug right? it look s like what happened is that the conversion stuck your rims out about an inch on each side. Im running the same wheel/tire set up you are (15x8) and Mine barely clear if I lower my front end if I were to lower that much, but I havent converted to 5 lug disc yet. The other guy will chime in too if im wrong oh and we need more pics! nice truck! __________________ 1967custom Last edited by michael bustamante; 05-22-2009 at 03:16 PM.

05-22-2009, 03:29 PM	#4
UltraBlue71 Registered User Join Date: Feb 2009 Location: OKC OK Posts: 489	Re: I have a fat tire! Might try the springs first, sounds like the cheapest solution to me, looks like that might give it just enuff room. __________________ "You can put lipstick on a pig, sure it's pretty pig, but it's still just a PIG... 71 LWB

05-22-2009, 03:34 PM	#5
lowriden58 Registered User Join Date: Jan 2008 Location: Chesapeake Beach, MD Posts: 812	Re: I have a fat tire! IMHO i think the 7" wheels with a smaller tire would look best. right now it looks south of the border __________________ 71 cheyenne lwb 300rwhp best 1/4 time so far 12.8 @103 http://i195.photobucket.com/albums/z...en58/001-2.jpg

05-22-2009, 06:54 PM	#6
ap2002 Registered User Join Date: Apr 2008 Location: Houston, TX Posts: 247	Re: I have a fat tire! i went from a 275/60/15 to a 245/60/15 and took care of that problem, this was on 15x8 wheels... huge difference.... __________________ 1971 C-10 SWB - LS swap w/4L60e, 20x8.5front 20x12rear, 1968 C-10 SWB - 454 BB TH350 -Gone!

05-30-2009, 08:01 PM	#7
chuckmc8 It's alsways something..... Join Date: Nov 2008 Location: Douglasville GA Posts: 1,171	Re: I have a fat tire! Changed tires out today and heres pics, went to 235/60R15 on fronts Attached Images

05-30-2009, 08:11 PM	#8
big_al_71 Registered User Join Date: Jun 2008 Location: South Florida Posts: 11,375	Re: I have a fat tire! much better Love that color blue... __________________ Get your facts first, and then you can distort them as much as you please!!!!!. Sylvester's build thread >>>http://67-72chevytrucks.com/vboard/s...ht=big+rebuild

05-30-2009, 09:15 PM	#9
66skylarkpost Registered User Join Date: Mar 2006 Location: kearney,nebraska Posts: 443	Re: I have a fat tire! a 235 tire on a 9 inch wheel ? you better take turns carefully ,dont want to blow a bead __________________ '70 k-10 longbox- mid 70's drivetrain 350/350 487x heads 10.1:1 flowmasters ,35's 3.73's auburn posi ,rear shackle flip. '72 short stepside U.S. forestry truck, '73 455 buick,400 turbo,dropped 2"-4 1/4" ,3.07 posi,:'89 silverado 1500 ,OK truck ,5.7 holley tbi ,trick 700r4 3.07 auburn posi ,and my '66 skylark ,'73 centurion and my '84 monte carlo imca stock car

05-30-2009, 09:51 PM	#10
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	Re: I have a fat tire! when my truck was that low I had 255/70-15's on 7" wheels. it filled the well nicely and didn't rub.

05-30-2009, 09:54 PM	#11
chuckmc8 It's alsways something..... Join Date: Nov 2008 Location: Douglasville GA Posts: 1,171	Re: I have a fat tire! "a 235 tire on a 9 inch wheel ? you better take turns carefully ,dont want to blow a bead" Goodrich specs 235 to 8.5" wheel, so I am not sweating the 1/2" extra

05-31-2009, 12:43 AM	#12
chevychase Registered User Join Date: Jun 2007 Location: Boca Raton, FL Posts: 476	Re: I have a fat tire! Did the new tires take care of the rubbing? __________________ Joe

05-31-2009, 06:37 AM	#13
jim zag ENGINE BUILDER Join Date: Apr 2006 Location: Shortsville n.y. Posts: 344	Re: I have a fat tire! I have 235 70 15 tires on 7 inch rims. It looks like you need more backspacing to pull the tires back inside the wheelwells. __________________ JIM ZAG

05-31-2009, 06:47 AM	#14
prairewolf Registered User Join Date: Oct 2005 Location: south dakota Posts: 1,893	Re: I have a fat tire! there is a member north of me a ways that had a whole case of them. but that was a couple weeks ago so who knows now, .... just tryin funny. life is good.kent __________________ eat,work,spend,sleep,repeat.

05-31-2009, 06:56 AM	#15
68C15 blood type; Retumbo Join Date: Jan 2004 Location: next to my reloading bench Posts: 10,269	Re: I have a fat tire! actually 9 blocks north and 12 blocks east to be exact Kent.



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05-31-2009, 09:10 AM	#16
67chevy3/4tontruck Account Suspended Join Date: May 2009 Location: atown Fl Posts: 42	Re: I have a fat tire! Be carefully when you turn with the 235 tire on a 9 inch wheel

05-31-2009, 12:14 PM	#17
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: I have a fat tire! http://www.dakota-truck.net/TIRECALC/ http://www.miata.net/garage/tirecalcold.html This may help determine if tires will work out your problem. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

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