Tires and wheels - The 1947 - Present Chevrolet & GMC Truck Message Board Network

70 longbed · 08-19-2005, 12:21 PM

I know it has been asked before, but the "sticky" for tires and wheels doesn't have the info and search is down.

How wide can I go? I want to put the widest tire and wheel combo I can, without modifying the wheel opening or the frame. I will mini tub (cut the bed floor out and resize the wheel well, and will roll the inside of the wheel well opening if necessary, but do not want to cut the narrow the frame.

Any pics would also be appreciated.

Keith

Purs · 08-19-2005, 01:04 PM

me too.

**Palf70Step** · 08-19-2005, 01:19 PM

For most of our trucks, the max you are going to tuck under is something with a 4.5" backspacing. In Most states your wheels and tires must also remain within the wheel wells, so you are probably looking at an 8" to 9" wide rim. Tires, whatever is recommended for those width wheels will normally clear. Tire measurements are not always exact between brands. If you want to keep all the wheels the same, you are probably limited to 8" wide and 4.5" backspacing. I have not seen any larger width sizes used on the front that don't have issues with clearance.

I have two sets for my truck, both on 15x8 with 4.0 back spacing. For street use, 275x60x15 and other use is 31x10.50x15. No clearance issues as far as hitting, and the both combinations come even with the outer edge of the fender so they would be legal in all states from that perspective.

I goofed mine were 4.0 Back spacing instead of the 4.5 I originally posted

tomatocity · 08-19-2005, 01:37 PM

Me too!

Currently I have aftermarket slots, 15x8.5 w/4.5" back spacing and 275/60/15 tires and I am not close to the inside or outside of the fenderwells.

I think I have seen some of the members with 15x10 wheels in the rear.

08-19-2005, 12:21 PM	#1
70 longbed Senior Member Join Date: Oct 2002 Location: Sierra Vista, AZ Posts: 489	Tires and wheels I know it has been asked before, but the "sticky" for tires and wheels doesn't have the info and search is down. How wide can I go? I want to put the widest tire and wheel combo I can, without modifying the wheel opening or the frame. I will mini tub (cut the bed floor out and resize the wheel well, and will roll the inside of the wheel well opening if necessary, but do not want to cut the narrow the frame. Any pics would also be appreciated. Keith __________________ Keith 70 CST longbed in progress. Hoping to get it back on the road soon.

08-19-2005, 01:04 PM	#2
Purs Got Big Block? Join Date: Apr 2000 Location: West Texas Posts: 1,510	me too. __________________ "Experience is what you get when you didn't get what you wanted."

08-19-2005, 01:19 PM	#3
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,216	For most of our trucks, the max you are going to tuck under is something with a 4.5" backspacing. In Most states your wheels and tires must also remain within the wheel wells, so you are probably looking at an 8" to 9" wide rim. Tires, whatever is recommended for those width wheels will normally clear. Tire measurements are not always exact between brands. If you want to keep all the wheels the same, you are probably limited to 8" wide and 4.5" backspacing. I have not seen any larger width sizes used on the front that don't have issues with clearance. I have two sets for my truck, both on 15x8 with 4.0 back spacing. For street use, 275x60x15 and other use is 31x10.50x15. No clearance issues as far as hitting, and the both combinations come even with the outer edge of the fender so they would be legal in all states from that perspective. I goofed mine were 4.0 Back spacing instead of the 4.5 I originally posted __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! Last edited by Palf70Step; 08-19-2005 at 05:37 PM. Reason: Change wheel measurement.

08-19-2005, 01:37 PM	#4
tomatocity Registered User Join Date: Jun 2005 Location: Sacramento CA Posts: 1,255	Me too! Currently I have aftermarket slots, 15x8.5 w/4.5" back spacing and 275/60/15 tires and I am not close to the inside or outside of the fenderwells. I think I have seen some of the members with 15x10 wheels in the rear. __________________ Got bored, sold everthing. Got bored, looking for a 1960-66 C-10. Want to build my last truck.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.