20 inch wheels with 5/7 drop - The 1947 - Present Chevrolet & GMC Truck Message Board Network

1984 swb chevy · 11-21-2007, 08:47 PM

I would like to run 20x8.5 up front and 20x10 in the rear. I have an 84 c-10 . I ike the big lip look in the rear and need to know what backspace I will need front and rear so they dont rub.Any help on tire size also. Thanks for the help in advance

pcmcobra · 11-21-2007, 09:33 PM

im running that wheel combo on my 86
5.5" bs on back, and 5.25 up front.
245/40 front
295/45/20 rear
no issues at all, could probably go with a little bigger tire up front.

tvblazer78 · 11-21-2007, 09:37 PM

I have been looking for about year on what I was going to get. And I have just ordered them.

Here is what you need.

front 8.5 wheel BS 5" with 245-40-20 or 255-40-20
Back 10 wheel BS 4.5 with 295-40-20 this will give you a little dish.

Trav

Quote:

Originally Posted by 1984 swb chevy

I would like to run 20x8.5 up front and 20x10 in the rear. I have an 84 c-10 . I ike the big lip look in the rear and need to know what backspace I will need front and rear so they dont rub.Any help on tire size also. Thanks for the help in advance

1984 swb chevy · 11-21-2007, 10:32 PM

Thanks guys for the info. PCM COBRA could you tell me if you were to lower your truck more would your wheels and tires tuck with out rubbing. I am 5/6 now and may lower the rear one or two more inches Thanks again for the help I just want to make sure I know what I need before I buy.

1984 swb chevy · 11-21-2007, 10:35 PM

Hey TVBlazer78. Do you have a pic of your wheels so I can see the offset you have. will your wheels tuck without rubbing. Thanks

pcmcobra · 11-21-2007, 11:39 PM

ya, mine would tuck.

1984 swb chevy · 11-22-2007, 08:39 PM

Thanks again for the info. I will call and order my wheels this week.

tvblazer78 · 11-23-2007, 12:33 AM

here is one of my old 17x 9.5 BS 3.5, had to roll the lip of the fender up to make them fit..

AirMale · 11-23-2007, 05:29 PM

Quote:

Originally Posted by tvblazer78

I have been looking for about year on what I was going to get. And I have just ordered them.

Here is what you need.

front 8.5 wheel BS 5" with 245-40-20 or 255-40-20
Back 10 wheel BS 4.5 with 295-40-20 this will give you a little dish.

Trav

I disagree here on the rear back space:
Should be 5.5 on a 10" wheel.

AirMale · 11-23-2007, 05:34 PM

rear wheel is 9.5 with 5" BS

tvblazer78 · 11-23-2007, 08:06 PM

Sorry that you do, but I have a 9.5 with 3.5 BS on it. It's a stock 12 bolt out of a 4x4 blazer. Here is the pic.

Quote:

Originally Posted by AirMale

I disagree here on the rear back space:
Should be 5.5 on a 10" wheel.

CLASSIC87' · 11-23-2007, 09:01 PM

I have 20x10's w 5.25 BS... I was going to go 5.00 but I run the disc covers and a 1/4 spacer as well. (I use the 1/4 spacer to keep my dust covers off of the drum weights; so they dont get dented)

1984 swb chevy · 11-24-2007, 10:34 PM

Thanks again for all the info. The 5 to 5/14 inch backspace looks like the way I need to go if I want a 20x10 to tuck without rubbing. If anyone has any good pics of 20 I would like to see them.

AirMale · 11-25-2007, 06:24 AM

good move getting at least 5" backspace. Here's a pic before I installed a 4 link.

1984 swb chevy · 11-25-2007, 08:46 PM

Very nice truck Airmail. Thanks for the picture.

1984 swb chevy · 11-25-2007, 08:49 PM

Hello Airmale could you tell me what size tire you are running

SCOTI · 11-25-2007, 11:40 PM

Rear 20x10's w/the equivalent of 5" BS was dead-on for my daily 5/7 static-dropped driver..... As you can see in the pic, the rear tires are slightly tucked @ ride height.

AirMale · 11-26-2007, 09:07 AM

front tire is 255/35/20 rear 295/40/20

1984 swb chevy · 11-27-2007, 12:50 AM

Thanks again guys. Now I can order my wheels and know they will fit.

AirMale · 11-27-2007, 06:16 AM

I would order 245/40/20 tires for the front, just to get some extra sidewall.

evan · 11-27-2007, 04:33 PM

Quote:

Originally Posted by AirMale

I would order 245/40/20 tires for the front, just to get some extra sidewall.

Would an extra 1.7" in total height still work?

AirMale · 11-27-2007, 05:22 PM

Quote:

Originally Posted by evan

Would an extra 1.7" in total height still work?

divided by 2. the only height added is below the spindle the rest is in the wheel well

evan · 11-27-2007, 11:39 PM

Quote:

Originally Posted by AirMale

divided by 2. the only height added is below the spindle the rest is in the wheel well

I was thinking of clearance issues more than ride height.

AirMale · 11-27-2007, 11:42 PM

SCOTI should know this???

1984 swb chevy · 11-28-2007, 09:12 PM

I ordered my wheels and tires today. I got 20x 8.5 with 5.25 backspace in the front and 20x10 with 5.00 backspace. I also got 295/40 /20 tires for the front and they said I could run 255/40/20 in the front. I wanted 245/40/20 but they do not have that size. Will I have a problem with the 255/40/20. My truck is an 84 C-10 with 5/7. The tires I ordered are Toyo Proxy.

11-21-2007, 08:47 PM	#1
1984 swb chevy Registered User Join Date: Nov 2007 Location: New Jersey Posts: 466	20 inch wheels with 5/7 drop I would like to run 20x8.5 up front and 20x10 in the rear. I have an 84 c-10 . I ike the big lip look in the rear and need to know what backspace I will need front and rear so they dont rub.Any help on tire size also. Thanks for the help in advance

11-21-2007, 09:33 PM	#2
pcmcobra Registered User Join Date: Aug 2006 Location: Florida Posts: 1,684	Re: 20 inch wheels with 5/7 drop im running that wheel combo on my 86 5.5" bs on back, and 5.25 up front. 245/40 front 295/45/20 rear no issues at all, could probably go with a little bigger tire up front. __________________ 1986 C10 SWB 6.0/6l90e Miami...Flee it like a native

11-21-2007, 10:32 PM	#4
1984 swb chevy Registered User Join Date: Nov 2007 Location: New Jersey Posts: 466	Re: 20 inch wheels with 5/7 drop Thanks guys for the info. PCM COBRA could you tell me if you were to lower your truck more would your wheels and tires tuck with out rubbing. I am 5/6 now and may lower the rear one or two more inches Thanks again for the help I just want to make sure I know what I need before I buy.

11-21-2007, 10:35 PM	#5
1984 swb chevy Registered User Join Date: Nov 2007 Location: New Jersey Posts: 466	Re: 20 inch wheels with 5/7 drop Hey TVBlazer78. Do you have a pic of your wheels so I can see the offset you have. will your wheels tuck without rubbing. Thanks

11-21-2007, 11:39 PM	#6
pcmcobra Registered User Join Date: Aug 2006 Location: Florida Posts: 1,684	Re: 20 inch wheels with 5/7 drop ya, mine would tuck. __________________ 1986 C10 SWB 6.0/6l90e Miami...Flee it like a native

11-22-2007, 08:39 PM	#7
1984 swb chevy Registered User Join Date: Nov 2007 Location: New Jersey Posts: 466	Re: 20 inch wheels with 5/7 drop Thanks again for the info. I will call and order my wheels this week.

11-23-2007, 12:33 AM	#8
tvblazer78 Low & Fast! Join Date: Jan 2007 Location: Knoxville, TN Posts: 3,110	Re: 20 inch wheels with 5/7 drop here is one of my old 17x 9.5 BS 3.5, had to roll the lip of the fender up to make them fit.. Attached Images __________________ Southeastern Mini Truckin' Nationals April 27 and 28, 2012 Last edited by tvblazer78; 11-23-2007 at 12:37 AM.

11-23-2007, 05:34 PM	#10
AirMale Senior Member Join Date: Jan 2003 Location: Atlantic City, NJ Posts: 1,073	Re: 20 inch wheels with 5/7 drop rear wheel is 9.5 with 5" BS Attached Images __________________ 86 SWB 9.0 LITER T-400-OD 4.11 eaton-4/5 drop Best 1/4 12.51 @112mph no traction

11-23-2007, 09:01 PM	#12
CLASSIC87' OL BLUU Join Date: Mar 2004 Location: WICHITA, KS. Posts: 1,065	Re: 20 inch wheels with 5/7 drop I have 20x10's w 5.25 BS... I was going to go 5.00 but I run the disc covers and a 1/4 spacer as well. (I use the 1/4 spacer to keep my dust covers off of the drum weights; so they dont get dented)

11-24-2007, 10:34 PM	#13
1984 swb chevy Registered User Join Date: Nov 2007 Location: New Jersey Posts: 466	Re: 20 inch wheels with 5/7 drop Thanks again for all the info. The 5 to 5/14 inch backspace looks like the way I need to go if I want a 20x10 to tuck without rubbing. If anyone has any good pics of 20 I would like to see them.

11-25-2007, 06:24 AM	#14
AirMale Senior Member Join Date: Jan 2003 Location: Atlantic City, NJ Posts: 1,073	Re: 20 inch wheels with 5/7 drop good move getting at least 5" backspace. Here's a pic before I installed a 4 link. Attached Images __________________ 86 SWB 9.0 LITER T-400-OD 4.11 eaton-4/5 drop Best 1/4 12.51 @112mph no traction

11-25-2007, 08:46 PM	#15
1984 swb chevy Registered User Join Date: Nov 2007 Location: New Jersey Posts: 466	Re: 20 inch wheels with 5/7 drop Very nice truck Airmail. Thanks for the picture.

11-25-2007, 08:49 PM	#16
1984 swb chevy Registered User Join Date: Nov 2007 Location: New Jersey Posts: 466	Re: 20 inch wheels with 5/7 drop Hello Airmale could you tell me what size tire you are running

11-25-2007, 11:40 PM	#17
SCOTI Registered User Join Date: Apr 2001 Location: DALLAS,TX Posts: 22,071	Re: 20 inch wheels with 5/7 drop Rear 20x10's w/the equivalent of 5" BS was dead-on for my daily 5/7 static-dropped driver..... As you can see in the pic, the rear tires are slightly tucked @ ride height. Attached Images __________________ 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.* Last edited by SCOTI; 11-25-2007 at 11:41 PM.

11-26-2007, 09:07 AM	#18
AirMale Senior Member Join Date: Jan 2003 Location: Atlantic City, NJ Posts: 1,073	Re: 20 inch wheels with 5/7 drop front tire is 255/35/20 rear 295/40/20 __________________ 86 SWB 9.0 LITER T-400-OD 4.11 eaton-4/5 drop Best 1/4 12.51 @112mph no traction



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11-27-2007, 12:50 AM	#19
1984 swb chevy Registered User Join Date: Nov 2007 Location: New Jersey Posts: 466	Re: 20 inch wheels with 5/7 drop Thanks again guys. Now I can order my wheels and know they will fit.

11-27-2007, 06:16 AM	#20
AirMale Senior Member Join Date: Jan 2003 Location: Atlantic City, NJ Posts: 1,073	Re: 20 inch wheels with 5/7 drop I would order 245/40/20 tires for the front, just to get some extra sidewall. __________________ 86 SWB 9.0 LITER T-400-OD 4.11 eaton-4/5 drop Best 1/4 12.51 @112mph no traction

11-27-2007, 11:42 PM	#24
AirMale Senior Member Join Date: Jan 2003 Location: Atlantic City, NJ Posts: 1,073	Re: 20 inch wheels with 5/7 drop SCOTI should know this??? __________________ 86 SWB 9.0 LITER T-400-OD 4.11 eaton-4/5 drop Best 1/4 12.51 @112mph no traction

11-28-2007, 09:12 PM	#25
1984 swb chevy Registered User Join Date: Nov 2007 Location: New Jersey Posts: 466	Re: 20 inch wheels with 5/7 drop I ordered my wheels and tires today. I got 20x 8.5 with 5.25 backspace in the front and 20x10 with 5.00 backspace. I also got 295/40 /20 tires for the front and they said I could run 255/40/20 in the front. I wanted 245/40/20 but they do not have that size. Will I have a problem with the 255/40/20. My truck is an 84 C-10 with 5/7. The tires I ordered are Toyo Proxy.

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