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#1 |
Registered User
Join Date: Sep 2007
Location: Gray,Tennessee
Posts: 182
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Switching to Rallys - need help
My 72 has 15x6 Weld wheels on the front and 15x10 on the rear wearing 225/75 and 315/75 tires. I want to put on some Rallys. My trouble is the truck has been set up to be level or close to it with the above tires. I have some Rallys with 255/70s on them, but the front end sits about 1 1/2" higher in the front with the 255s on it.
What size tire can I run in the front to get it back level or some rake? thought about 235 or 245/ 60 and stay with a 255 in the rear. Or do I need to lower the front of the truck more to accomodate a 255 (maybe a 60 series) in the front? Attached is a picture of the truck with the little fronts and big rears...
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'85 C-10, with 93 LT-1 & 4L60 1985 GMC, lookin' for its big block motor - SOLD '72 Chevy C-10 Cheyenne-SOLD |
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#2 |
Active Member
Join Date: Oct 2006
Location: Ohio
Posts: 1,643
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Re: Switching to Rallys - need help
You would likley be better off running some coil spring spacers in the rear
I do not think you will fins a short enough tire that will still fit on ralley wheels to make up 1.5"
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1968 SWB 454 + .040, 490HP x 540 FT pounds of Torque 10-1 Kb Forged pistons, recon rods w/ ARP wave loc bolts 781 heads Ported with 2.19/1.88 SSTvalves Lunati 60204 cam, Micro Trol lifters, Ported Edelbrock Performer Rpm manifold armor coated, Pertronix Triple Strike Ignition Holley 770 Street Avenger carb,Headers armor coated Built by Watson Ruppel Performance in Sarahsville Ohio. Hardshift Tranny Built Turbo 350,TSI 10" 3000 stall 12 Bolt Eaton Posi 4.10 Richmond Gears moser axles ![]() 18.5" x 31" Hoosier Pro Street Radials ![]() ET Classic 5 Wheels - polished Power Steering, Power Brakes,Disc Brakes,Tach & Gauge Dash, Tilt,Factory Air (gone) Custom Paint & Body Work Special thanks to my wife, my son and my money tree ![]() |
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#3 |
Registered User
Join Date: Oct 2009
Location: canton ga
Posts: 12,728
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Re: Switching to Rallys - need help
I dont have an answer for you but that is one fine looking truck ,similar to the color I hope mine turns out and mine will be running ralleys too but at stock height. I keep scrolling back up to look at that beauty .
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#4 |
Registered User
Join Date: Sep 2007
Location: Gray,Tennessee
Posts: 182
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Re: Switching to Rallys - need help
thanks for the comments.... tell me more about the coil spring spacers!!!!
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'85 C-10, with 93 LT-1 & 4L60 1985 GMC, lookin' for its big block motor - SOLD '72 Chevy C-10 Cheyenne-SOLD |
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#5 |
I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,993
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Re: Switching to Rallys - need help
Nice truc k!! How was it lowered? this may make a difference in what works best/spends less.Keep in mind that Rallies are 8" so the current rear tires will be too wide for the rim.You can get aftermarket rallies that wide IIRC but they be spendy.
This may help http://www.dakota-truck.net/TIRECALC/ or this http://www.miata.net/cgi-bin/tirescgi
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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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#6 |
Registered User
Join Date: Sep 2007
Location: Gray,Tennessee
Posts: 182
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Re: Switching to Rallys - need help
Don't really know how it was lowered.. it was done in 93 when the truck was built..
i want away from the 315/75s on the rear.. i think i may need to put the rallys i have with the 255/70s on the rear and let the front down with a jack until I get the rake i like, measure to the top of the wheel well opening and figure out what front tire will work the best.... but keep the ideas rolling
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'85 C-10, with 93 LT-1 & 4L60 1985 GMC, lookin' for its big block motor - SOLD '72 Chevy C-10 Cheyenne-SOLD |
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#7 |
Registered User
Join Date: Aug 2010
Location: Tennessee
Posts: 26
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Re: Switching to Rallys - need help
I really wish BFG would bring those rear tires back. There's really a void in the market if you want a bigger tire like yours that's affordable and not a race type tire.
Anyway, I think a mean looking setup would be a 15x6 w/215's on the front and 15x10 w/285/70 on the rear.
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'68 C10 SWB "Purple Nurple" |
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#8 |
Registered User
Join Date: May 2011
Location: mich
Posts: 655
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Re: Switching to Rallys - need help
Looks great just the way it is. Would not touch a thing.
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#9 |
Registered User
Join Date: Dec 2010
Location: murray ky
Posts: 351
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Re: Switching to Rallys - need help
i would put 275/60's on the rear. should be almost an inch taller than 255's. but if still not enough you could either lower front or raise rear an inch or so. i like the look you have now (what i wanted) but the wheels i bought have wrong backspacing so i had 2 stay short with 295/50 on 10 inch tt2's in rear and 235/60 on 7 inchers on front, would love to see yours on mine.
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#10 |
Registered User
Join Date: Sep 2007
Location: Gray,Tennessee
Posts: 182
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Re: Switching to Rallys - need help
Thanks for the info and comments guys... the welds will be for sale shortly after I get the Rallys situated....
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'85 C-10, with 93 LT-1 & 4L60 1985 GMC, lookin' for its big block motor - SOLD '72 Chevy C-10 Cheyenne-SOLD |
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#11 |
Registered User
Join Date: Sep 2007
Location: Gray,Tennessee
Posts: 182
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Re: Switching to Rallys - need help
I put the Rallys with the 255/70s on her today... Tires are dirty and wheels are to be painted. Is the stance OK or does it need more rake??????
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'85 C-10, with 93 LT-1 & 4L60 1985 GMC, lookin' for its big block motor - SOLD '72 Chevy C-10 Cheyenne-SOLD |
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#12 |
Registered User
![]() Join Date: Mar 2007
Location: Marbury, Alabama
Posts: 195
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Re: Switching to Rallys - need help
Looks good to me
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#13 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,977
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Re: Switching to Rallys - need help
Why were you getting away from the 'current' sizes?
It looked nice (& I don't care for Welds). I would have just swapped to some ralleys in the same sizes & rolled as is or gone a little shorter tire in the rear (275-60's/285-70's).
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#14 |
Registered User
Join Date: Oct 2005
Location: Iowa
Posts: 136
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Re: Switching to Rallys - need help
I am running a 255/70/15 rear 235/70/15 front combo on my burb with a 5" drop in the rear and a 4" drop in the front. I think one of the issues you might find by going to a shorter tire on the front is that the gap between the top of front fender and tire will be more on the front than the rear. The closer to the same you keep these gaps the better is looks.
IMO the back looks perfect. I suggest lowering the front and going to a 235/70. |
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#15 |
Registered User
Join Date: Sep 2007
Location: Gray,Tennessee
Posts: 182
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Re: Switching to Rallys - need help
I didn't like the big spread in tire sizes from front to rear and really thought the truck might sell better without the pro street look. the 315/75 is a large tire....
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'85 C-10, with 93 LT-1 & 4L60 1985 GMC, lookin' for its big block motor - SOLD '72 Chevy C-10 Cheyenne-SOLD |
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#16 |
Senior Moment
![]() Join Date: Mar 2002
Location: Pittsburg Ca
Posts: 4,139
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Re: Switching to Rallys - need help
What are you doing with the Welds?? I think they would look GREAT on my truck
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1970 CST LS 1 6 speed Ford 9 inch Detroit Tru Track, Dakota Didgital, Vintage Air, QA1 Coil Overs Front & Rear Lots of FUN 2013 GMC PU, Oldest Son 71 GMC LWB. QA1 Suspension, Angry SB. Youngest Son 2019 GMC Diesil Dually. Youngest Son 2017 Toyota SUV Daughters car 2018 Traverse , Wife’s Ride Pittsburg Ca 94565 |
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#17 |
Eat, Sleep, Drive a Chevy
Join Date: Apr 2010
Location: the town of the cow, Texas
Posts: 1,152
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Re: Switching to Rallys - need help
The truck looks great with the rallys, I agree that 275/60's would look good back there
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Trey Silence may be Golden, but Duct Tape is Silver! 72 Short Step 57 "big window" short step |
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#18 |
70+ ( Old Skool Club )
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Location: Saskatoon, Saskatchewan ,Canada
Posts: 9,119
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Re: Switching to Rallys - need help
Your truck looks great with the 255/70's on it now. However if you went to a 275/60R15 on the back it would be 27.98 inches high and would fit great on on a 8 inch Rally. The 225/75 you have on the front now are 28.28 inches high which is close to the 27.98 height of the 275/60 so you could have the level look you want but you would need to find a 15 x 7 inch rally for the 225 tire. I also think this would be the cheapest way for your accomplish what you want to do.
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#19 | |
Registered User
Join Date: Jan 2005
Location: Clearlake Oaks CA
Posts: 1,716
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Re: Switching to Rallys - need help
Quote:
If you like trhe stance/Aspect Ratio, let me know, and I'll get the tire sizes I'm running and post them here for you.
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Hello members... I'd like you to know that I sold, my 72 GMC (Ratikle), back in November of 2011. I don't visit the site much anymore, but please feel free, to drop me a private message. RIP...."RATIKLE" |
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#20 |
Registered User
Join Date: Sep 2007
Location: Gray,Tennessee
Posts: 182
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Re: Switching to Rallys - need help
WWOTR... let me know the sizes
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'85 C-10, with 93 LT-1 & 4L60 1985 GMC, lookin' for its big block motor - SOLD '72 Chevy C-10 Cheyenne-SOLD |
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#21 |
Registered User
Join Date: Jan 2007
Location: Sylvania, Alabama
Posts: 288
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Re: Switching to Rallys - need help
when you get ready to sell the welds, let me know im in alabama..
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#22 |
Registered User
Join Date: Jan 2005
Location: Clearlake Oaks CA
Posts: 1,716
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Re: Switching to Rallys - need help
Running BF Goodrich 215-70 R15 Front / BF Goodrich 275-60 R15 Rear.
I should also mention that its lowered 5.5" in Front and 6" in the rear. Front was done with 2 1/2" Drop Spindles and 3" CPP Springs/Shocks. The Rear was done with 4" CPP Springs, Shocks and a 2" Lowering Block. Shock Relocators were also used. Hope that helps! ![]()
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Hello members... I'd like you to know that I sold, my 72 GMC (Ratikle), back in November of 2011. I don't visit the site much anymore, but please feel free, to drop me a private message. RIP...."RATIKLE" Last edited by wwotr; 09-04-2011 at 04:32 PM. |
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