tire size question - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > General Technical Discussions > Tires & Wheels > tire size question

Engo winches available at www.rockridge4wd.com! Free shippJeep speedometer gears at rockridge4wdDana 30 Truss for your TJ, LJ, ZJ, and XJ

Reply
Unread 06-04-2004, 08:08 PM   #1
x wheelin
Registered User
 
Join Date: Oct 2003
Location: connecticut
Posts: 87
tire size question

I just got a couple of old spares for my tj,
the only problem is i dont know exactly what sizes they are

one is a bfg mt and its A 255/85/16 and the other is a trxus m/t and its a 235/85/16

can anyone tell me how tall and wide theses are?

thanks

x wheelin is offline   Reply With Quote
Unread 06-04-2004, 08:31 PM   #2
YJWOLF
Registered User
 
Join Date: Aug 2003
Posts: 439
255/85R16 is close to a 33"x10"

and the 235/85R16 is close to a 32"x9" or so.
__________________
Jeeps-Offroad
YJWOLF is offline   Reply With Quote
Unread 06-04-2004, 10:59 PM   #3
BigWaylon
tubework is cool...
 
BigWaylon's Avatar
 
Join Date: Nov 2003
Location: Charlotte, NC
Posts: 7,381
YJWOLF is right on...there are online calculators, but it's a calculation you ought to know how to do anyway...

quick tire lesson (for you and anybody else that scans)...

255/85/16...is a tire that is 255mm wide, with the profile being 85% of that, made for a 16" rim...

so, the width is 255/25.4 (25.4 millimeters in an inch)...
and the height is the profile multiplied by the width, and doubled (to account for the top and bottom), converted to inches, and then add the wheel size, so 255*.85*2/25.4+16

using that, you get the following:

255/85/16 = 33.07x10.04x16, so a 33x10.00x16 tire (don't think you'll find one of those)
235/85/16 = 31.73x9.25x16, so 32x9.00x16 or 32x9.50x16 (another size that I don't recall seeing)

new information for some..."who gives a rat's" info for some...and common knowledge for others...

so, if you've been waiting to learn something new, and you just did, you can now go to bed...

Greg
__________________
2001 TJ 60th Anniversary Edition (details in Profile)
www.carolinarockshop.com
All the pics I have...including a Table of Contents
BigWaylon is offline   Reply With Quote
Unread 06-05-2004, 08:50 AM   #4
x wheelin
Registered User
 
Join Date: Oct 2003
Location: connecticut
Posts: 87
Thanks alot guys,

For letting me go to sleep
x wheelin is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.