Tire question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Kansas Kid · 12-18-2003, 01:04 AM

Ok guys, I am in the process of buying a 71 K10 Chevy pickup from a co-worker. The first thing I want to do so I feel safe taking it out on the road is dump the factory 15" rims (assuming they are split rims) and the wore out 30x9.5" tires for a set of 16" rims and tires. So my question is, what are the largest 16" tires that I can safely fit on this truck?

And am I correct in thinking that that bolt pattern is 6 on 5.5"?

Martin64 · 12-18-2003, 01:28 AM

'71 is 5 lug and they didn't come with split rims, so not much to worry about there....

1969 GMC · 12-18-2003, 01:29 AM

Welcome to the board!
you should be able to fit 33" tires with no lift, assuming the wheels/tires aren't that wide, and your springs haven't drooped any. 31" or 32" would be better, but alot of 33" tires aren't actually 33" OD, they're actually smaller.

Rooster's 67 · 12-18-2003, 01:32 AM

71 K10 should be 6 on 5.5" and they will be 15" rims so depending on lift and the suspension ride height that will determine the largest tire to use.
The 4X4 guys will be able to answer the size question better than I.

Martin64 · 12-18-2003, 01:34 AM

Quote:

'71 is 5 lug

My bad..I was thinking C10.... guess I should learn to read..

Longhorn Man · 12-18-2003, 02:34 AM

No reason to ditch the rims onless they are just too ugly for you. The split rims were on the 3/4 ton and bigger, and even then, most did not have them.

JayDubBlazer · 12-18-2003, 09:43 AM

I had 33X12.5 bf goodwich ATs on my old blazer with no lift

**CUSTOM/10** · 12-18-2003, 10:56 AM

2wd's had 5 lug rims and the 4x4's had 6 lug rims ( 1/2 ton )
I had 33x12.5x15's on my truck at one time with no lift and they did rub the fenders at times. I also had 33x9.5x15's with no lift and had no problems. I'm currently running 33x9.5x15's with a 2.5" lift and like this combo.

Gary

Kansas Kid · 12-19-2003, 01:57 AM

Thanks for the info guys. I thought it looked like I might be able to fit some 255/85R16 tires, but wasn't sure if they would rub. I'm sure the springs have sagged over time though, so I will probably stick with a 265/75R16 just to be safe.

Guess I don't really need to ditch the rims (although the tires are a different story) since they aren't split rims, but I really prefer a 16 rim/tire combo.

12-18-2003, 01:04 AM	#1
Kansas Kid Registered User Join Date: Feb 2002 Location: Salina, KS Posts: 13	Tire question Ok guys, I am in the process of buying a 71 K10 Chevy pickup from a co-worker. The first thing I want to do so I feel safe taking it out on the road is dump the factory 15" rims (assuming they are split rims) and the wore out 30x9.5" tires for a set of 16" rims and tires. So my question is, what are the largest 16" tires that I can safely fit on this truck? And am I correct in thinking that that bolt pattern is 6 on 5.5"?

12-18-2003, 01:28 AM	#2
Martin64 Registered User Join Date: Oct 2003 Location: Yuma, Az Posts: 477	'71 is 5 lug and they didn't come with split rims, so not much to worry about there.... __________________ Martin Gibson USAF Retired 1964(-ish) C10

12-18-2003, 01:29 AM	#3
1969 GMC Registered User Join Date: Feb 2003 Location: The Rubber City Posts: 5,498	Welcome to the board! you should be able to fit 33" tires with no lift, assuming the wheels/tires aren't that wide, and your springs haven't drooped any. 31" or 32" would be better, but alot of 33" tires aren't actually 33" OD, they're actually smaller. __________________ 1969 GMC K2500 1996 Honda Accord 2007 Kawasaki KLR 650

12-18-2003, 01:32 AM	#4
Rooster's 67 Registered User Join Date: Sep 2003 Location: DFW Posts: 765	71 K10 should be 6 on 5.5" and they will be 15" rims so depending on lift and the suspension ride height that will determine the largest tire to use. The 4X4 guys will be able to answer the size question better than I. __________________ 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?

12-18-2003, 09:43 AM	#7
JayDubBlazer go cyclones Join Date: Jun 2003 Location: Ames, IA Posts: 1,885	I had 33X12.5 bf goodwich ATs on my old blazer with no lift __________________ Wes PROJECT OLE GREEN 1972 Blazer 4X4 350/700R4 2017 Silverado LT

12-18-2003, 02:34 AM	#6
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	No reason to ditch the rims onless they are just too ugly for you. The split rims were on the 3/4 ton and bigger, and even then, most did not have them.

12-18-2003, 10:56 AM	#8
CUSTOM/10 Senior Member Join Date: May 2003 Location: Sandown, NH Posts: 2,833	Tire size 2wd's had 5 lug rims and the 4x4's had 6 lug rims ( 1/2 ton ) I had 33x12.5x15's on my truck at one time with no lift and they did rub the fenders at times. I also had 33x9.5x15's with no lift and had no problems. I'm currently running 33x9.5x15's with a 2.5" lift and like this combo. Gary

12-19-2003, 01:57 AM	#9
Kansas Kid Registered User Join Date: Feb 2002 Location: Salina, KS Posts: 13	Thanks for the info guys. I thought it looked like I might be able to fit some 255/85R16 tires, but wasn't sure if they would rub. I'm sure the springs have sagged over time though, so I will probably stick with a 265/75R16 just to be safe. Guess I don't really need to ditch the rims (although the tires are a different story) since they aren't split rims, but I really prefer a 16 rim/tire combo.



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