Backspacing 20" Wheels - The 1947 - Present Chevrolet & GMC Truck Message Board Network

JMac11 · 12-13-2006, 03:35 PM

Found some 20's I can stand. Similar to what Dave johnson has on his Black Jimmy. They come with 5" Back Spacing. Will the extra rim size help the clearance issue? Can get them for a steal, just not close enough to check for fit.

LUV2XCLR8 · 12-13-2006, 06:10 PM

Quote:

Originally Posted by JMac11

Will the extra rim size help the clearance issue?

Depends on the tire size

JMac11 · 12-13-2006, 06:33 PM

They should fit the wheel well. 33x12.50's. I thought there was a steering clearaance issue??

LUV2XCLR8 · 12-13-2006, 06:59 PM

Might be, how much lift do you have again?

JMac11 · 12-13-2006, 09:06 PM

ok.... here goes:

Truck is supposed to have a 4" lift. The distance from the factory bumb stop and the spring retainer on the front axle is > 5".

Existing setup is 285/r70/16 on what appears to be 16"x8" with 4" back spacing

The only thing close to the wheel is the tie rod end and it is CLOSE, but it would be 3 or more inches inside a 20" rim and the distance should remain constant unless catastrophic failure were to occur.

LUV2XCLR8 · 12-13-2006, 10:47 PM

Sounds like it will work, can you test fit them before you buy em?

JMac11 · 12-14-2006, 07:28 AM

nope, great thing about Ebay, ain't it....... Gotta be a riverboat gambler, sometimes.

2wdBlazer · 12-14-2006, 11:16 AM

I would not even try 5 inches. You couldn't do a u-turn in a mall parking lot.

JMac11 · 12-14-2006, 11:51 AM

?? Lost me there? CLearance or Steering Geometry issue?

2wdBlazer · 12-15-2006, 12:52 AM

you are putting the tire too close. i was being sarcastic, you may be able to turn but definate rubbage.

70rs/ss · 12-15-2006, 12:40 PM

The back space issue comes from interferance with the ball joint, but he is talking 20's so it will place the tire/wheel far from the tierod. Most of these trucks like 3.5-4" of backspace, if nothing else steal em on ebay, try em and if they do not fit re-ebay them or just get a 1" spacer to put the wheel at 4" of backspace. Billet spacers are way strong and an inch is not an issue (2" and up I'd be concerned) Good Luck!!

12-13-2006, 03:35 PM	#1
JMac11 Registered User Join Date: May 2005 Location: Tallahassee Fl Posts: 773	Backspacing 20" Wheels Found some 20's I can stand. Similar to what Dave johnson has on his Black Jimmy. They come with 5" Back Spacing. Will the extra rim size help the clearance issue? Can get them for a steal, just not close enough to check for fit.

12-13-2006, 06:33 PM	#3
JMac11 Registered User Join Date: May 2005 Location: Tallahassee Fl Posts: 773	Re: Backspacing 20" Wheels They should fit the wheel well. 33x12.50's. I thought there was a steering clearaance issue??

12-13-2006, 06:59 PM	#4
LUV2XCLR8 The LuvShack Garage Join Date: Jan 2004 Location: Maple Grove, TN (West Side) Posts: 30,468	Re: Backspacing 20" Wheels Might be, how much lift do you have again? __________________ Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Tow Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T

12-13-2006, 09:06 PM	#5
JMac11 Registered User Join Date: May 2005 Location: Tallahassee Fl Posts: 773	Re: Backspacing 20" Wheels ok.... here goes: Truck is supposed to have a 4" lift. The distance from the factory bumb stop and the spring retainer on the front axle is > 5". Existing setup is 285/r70/16 on what appears to be 16"x8" with 4" back spacing The only thing close to the wheel is the tie rod end and it is CLOSE, but it would be 3 or more inches inside a 20" rim and the distance should remain constant unless catastrophic failure were to occur.

12-13-2006, 10:47 PM	#6
LUV2XCLR8 The LuvShack Garage Join Date: Jan 2004 Location: Maple Grove, TN (West Side) Posts: 30,468	Re: Backspacing 20" Wheels Sounds like it will work, can you test fit them before you buy em? __________________ Owner/Op: "TN Classic Transport Carriers" The Toy: "Square Vette" 72 Hybrid Blazer Toy Barn: "LuvShack" 40 x 60 x 20 Shop Tow Piggy:"Maddy" 88 Silverado 3500 Hauler: "Feathers" 14 Aluma 8218T

12-14-2006, 07:28 AM	#7
JMac11 Registered User Join Date: May 2005 Location: Tallahassee Fl Posts: 773	Re: Backspacing 20" Wheels nope, great thing about Ebay, ain't it....... Gotta be a riverboat gambler, sometimes.

12-14-2006, 11:16 AM	#8
2wdBlazer The Blazer King Join Date: Sep 2000 Location: Valrico, Fl (Tampa) Posts: 1,212	Re: Backspacing 20" Wheels I would not even try 5 inches. You couldn't do a u-turn in a mall parking lot. __________________ 72 2wd Blazer. Its the superbichinest, megacoolinest, superflowinest.

12-14-2006, 11:51 AM	#9
JMac11 Registered User Join Date: May 2005 Location: Tallahassee Fl Posts: 773	Re: Backspacing 20" Wheels ?? Lost me there? CLearance or Steering Geometry issue?

12-15-2006, 12:52 AM	#10
2wdBlazer The Blazer King Join Date: Sep 2000 Location: Valrico, Fl (Tampa) Posts: 1,212	Re: Backspacing 20" Wheels you are putting the tire too close. i was being sarcastic, you may be able to turn but definate rubbage. __________________ 72 2wd Blazer. Its the superbichinest, megacoolinest, superflowinest.

12-15-2006, 12:40 PM	#11
70rs/ss Registered User Join Date: Dec 2004 Location: Northern AZ Posts: 7,270	Re: Backspacing 20" Wheels The back space issue comes from interferance with the ball joint, but he is talking 20's so it will place the tire/wheel far from the tierod. Most of these trucks like 3.5-4" of backspace, if nothing else steal em on ebay, try em and if they do not fit re-ebay them or just get a 1" spacer to put the wheel at 4" of backspace. Billet spacers are way strong and an inch is not an issue (2" and up I'd be concerned) Good Luck!!

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.