The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - tire size

Overdriven · 08-20-2016, 11:53 PM

Instead of waiting for someone to post you can find it for yourself. One way is to look through the static drop thread for someone withthe same or similar drop.
http://67-72chevytrucks.com/vboard/s...d.php?t=471442

Personally I'd figure it out myself. Jack up the truck and mount the wheels. Now you want the truck resting on the suspension so put the jack stands under the suspension or put some wood under wheels (don't want nice new wheels on the pavement) and lower the truck down. Once the truck is resting on the suspension bounce on the front and back a few times to get it to settle. Now simply measure from the axle centerline to the top of the wheel opening. Now you just need to determine how much space you want between the tire and the wheel opening. Subtract that amount and you have the radius of your tire, multiply by 2 and you have your tire diameter.

Now I'm not a tire size expert and I don't feel like looking up appropriate widths for the size wheels you have. You can do that on various online tire sites (tire rack, etc) or go to your local tire shop and tell them your wheel size and desired tire diameter and they'll figure it out for you. Maybe they'll even work with you and let you (pay for and) take some tires home, see how they look up against your truck and swap them until you find what looks good and fits right. If they and you are really nice, maybe they'll even mount a front and a rear and let you exchange them if they're not right for little or no extra charge. Maybe they'll have a set of wheels and tires you can throw on to get your truck down to them so they can measure and test fit for clearance.

Edit: To help make sure you get tires that will fit, measure from the wheel to the frame, upper and lower control arm with the wheel straight and turned, to the wheel opening with the wheel turned, etc. Anything that the tire could possibly hit while straight, with the wheel turned and suspension compressed, all situations. Armed with these measurements you can figure out what will fit and what won't making it easier to get the right size tire the first time.

08-20-2016, 11:53 PM	#3
Overdriven Registered User Join Date: Mar 2016 Location: Long Island NY Posts: 598	Re: tire size - need help Instead of waiting for someone to post you can find it for yourself. One way is to look through the static drop thread for someone withthe same or similar drop. http://67-72chevytrucks.com/vboard/s...d.php?t=471442 Personally I'd figure it out myself. Jack up the truck and mount the wheels. Now you want the truck resting on the suspension so put the jack stands under the suspension or put some wood under wheels (don't want nice new wheels on the pavement) and lower the truck down. Once the truck is resting on the suspension bounce on the front and back a few times to get it to settle. Now simply measure from the axle centerline to the top of the wheel opening. Now you just need to determine how much space you want between the tire and the wheel opening. Subtract that amount and you have the radius of your tire, multiply by 2 and you have your tire diameter. Now I'm not a tire size expert and I don't feel like looking up appropriate widths for the size wheels you have. You can do that on various online tire sites (tire rack, etc) or go to your local tire shop and tell them your wheel size and desired tire diameter and they'll figure it out for you. Maybe they'll even work with you and let you (pay for and) take some tires home, see how they look up against your truck and swap them until you find what looks good and fits right. If they and you are really nice, maybe they'll even mount a front and a rear and let you exchange them if they're not right for little or no extra charge. Maybe they'll have a set of wheels and tires you can throw on to get your truck down to them so they can measure and test fit for clearance. Edit: To help make sure you get tires that will fit, measure from the wheel to the frame, upper and lower control arm with the wheel straight and turned, to the wheel opening with the wheel turned, etc. Anything that the tire could possibly hit while straight, with the wheel turned and suspension compressed, all situations. Armed with these measurements you can figure out what will fit and what won't making it easier to get the right size tire the first time. Last edited by Overdriven; 08-21-2016 at 12:00 AM.