Need help with size

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Need help with size

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Blazer >> Modifications >> Tires and Wheels >> Need help with size

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Need help with size - 3/7/2008 8:44:12 AM

SmokeU

Posts: 246
Joined: 11/7/2007
Status: offline

what are the stock sizes for the ZR2

i know it says on the tire but i dont understand the numbers as to what it meens...

like what are the tire and rim size is what i need to know so that when it comes time that i have money to do so i can get the right ones :)

ProComp Xtreme Steel Wheels Series 152

with

BFG Mud Terrain T/A Tires

and then is there some kind of math equation or something if i were going to do a 6 inch suspension lift as to say what size i would need then?

< Message edited by SmokeU -- 3/7/2008 8:52:32 AM >

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RE: Need help with size - 3/7/2008 10:10:56 AM

WolfPack

Posts: 2844
Joined: 10/30/2007
From: Raleigh, NC
Status: offline

Whatever you do, don't buy from them. Jigg has em 20 bucks/rim cheaper! Synergy Offroad

As for the sizes, youre lookin for a 15'' rim, 5x4.75 bolt pattern, and backspacing is a matter of preference. As for tire size, I thought ZR2s use 31x10.50s, but I'm not positive on that.

< Message edited by WolfPack -- 3/7/2008 10:16:40 AM >

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RE: Need help with size - 3/7/2008 11:37:02 AM

otnietdehoooo

The Chop Shop Moderator
Posts: 1627
Joined: 5/25/2007
From: Ft. Worth, TX
Status: offline

even though it has been explained countless times, i will do so again.

if the tire size is (LT/P)235/75r15

LT stands for light truck and P stands for passenger

1st number (235) width in mm of the tread. in this case, the tread would be 235mm, 23.5cm, or 9.252" (2.54cm = 1")

2nd number (75) is the ratio of the tread width to the sidewall height. in this case, the sidewall is 75% as wide as the tread. 0.75 x 235 = 176.25mm. this means that from the top of the rim to the top of the tire is 176.25mm, 17.625cm, or 6.939"

3rd number (15) is the diameter of the rim

now, to put it into context, Rim Height + (sidewall x2) = total height of tire. 15 + (2 x 6.939) = 28.878... this means a tire that is 235/75r15 is 28.878" tall and 9.252" wide

another common measurements would be, say 31x10.5x15... 31" tall, 10.5" wide and a 15" rim

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RE: Need help with size - 3/7/2008 2:21:02 PM

SmokeU

Posts: 246
Joined: 11/7/2007
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dude sweet thanks

and yeah i know some places that have them cheaper i jst searched on google and thats what it came up with and it had all the differnet sizes and stuff so yeah

its referance

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RE: Need help with size - 3/7/2008 5:14:34 PM

a_tack

Suspension Tech Moderator
Posts: 1287
Joined: 4/5/2006
From: Ashland, Kentucky
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the tire size for your ZR2 will not be in millimeters (ex. 235/75/r15) it will be in inches (ex. 31x10.5x15) the stock tires are 31x10.50x15... you will need a 15 inch rim with 5 on 4.75 bolts pattern and a 6 inch backspacing to replace the stockers... a popular upgrade is a rim with 4.5 inches of backspacing... when you do the swap remember to POST PICS!!!!!

(you can find a 31x10.50 equivalent in millimeters, it's just easier to buy a 31x10.50.... most tire shops regularly stock this size as it is a stock option on Chevy S-series ZR2's and also a stock size on late model ford, chevy, dodge, and toyota pickups..)

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RE: Need help with size - 3/8/2008 6:54:10 AM

AJBert

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Joined: 10/27/2007
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quote:

ORIGINAL: WolfPack

As for the sizes, youre lookin for a 15'' rim, 5x4.75 bolt pattern, and backspacing is a matter of preference.

Backspacing is MORE than a matter of preference, unless you really like to change out your front end parts on a continuing basis. The closer you can get to the stock backspacing of 6" the happier your ball joints will be.

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RE: Need help with size - 3/8/2008 7:30:14 AM

Hanr3

Wheels & Tire Moderator
Posts: 3482
Joined: 5/11/2005
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balljoints, tie rod ends, end links, inner fender bolts and a few more parts that take the brunt of it. Sure it wont happen overnight, but it will happen, and at times it will become painfully obvious. No chick wants to hear your truck rubble and feel her feet shake when you make turns. The meatier the tire, the worse the rumble and shake. Back spacing is important on our trucks.

If your lifting the truck, or going to trim the fenders, or move the body away fromt eh tire in another fashion? Great, run what you want and take care of the rest. Post pics.

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RE: Need help with size - 5/8/2008 9:06:38 PM

SmokeU

Posts: 246
Joined: 11/7/2007
Status: offline

finnaly my B day is fast approaching so I can do an upgrade and it might be the tires

but there is either deer guared / lights or intake and exaust i have to choose unless i can get the rims for cheap then i can both the rims and the deer guared / lights or the exaust and intake

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