upgrade from 285/75/16's, how big to go

Landpimp

GOLD Star
 
 
Joined
Mar 14, 2003
Messages
16,104
Location
Gig Harbor WA
OK, i am thinking about going bigger than the current 285/75/16's on the 2000 UZJ

its lifted with Slee t-bars and OME springs, about 2+ in the front and 2.5 or so in the back.

I am not sure if 35's(315's?) will fit and I am not sure I want to go that big anyway.

so whats a good size to upgrade to?

(the 285's will get swaped the the LX470)

looking for advice/thoughts

John
 
Joined
Dec 29, 2003
Messages
2,396
Location
Louisville, KY
I think my 295 Nitto's look killer on my truck. With my lift, they look like the tires were made for the lift i.e. perfect balance.
 

DBrown2

 
Joined
Mar 7, 2005
Messages
602
Location
Dayton, TN
Go to a 295/75/16. My buddy just went from 285's to these on his Super Duty and man what a difference.

Or go to 305/70/16. They only rub in hard drop situations, but the foot print is wider, giving you more stability on the rocks, and more grabbing surface.

Edit mine has no lift, hince the rub
 

e9999

You want to do what...?
Moderator
 
 
Joined
Sep 21, 2003
Messages
16,660
Location
US
what's wrong with 285s?
unless you plan on spending your life on the rocks, 35s are not really necessary IMHO
 

hoser

SILVER Star
 
 
Joined
Dec 21, 2003
Messages
9,113
Location
Bay Area, CA
I like the 295's. It is probably the max size you can put in the spare tire location if you have a tow hitch.. if that's of any importance to you.

also it's nice to have the same size on more than one rigs. Lots of potential spares, food for rotation etc
 

hoser

SILVER Star
 
 
Joined
Dec 21, 2003
Messages
9,113
Location
Bay Area, CA
Tire size designation and actual tire size are rarely the same.

According to their website, a BFG AT/KO measures:
285/75-16 is 33" and 11.3" wide (on 8" rim)
305/70-16 is also 33" and 12.2" wide (on 9" rim)

So in this case, they are equal in diameter.
 

tabraha

Hello My Name is: TAD
SILVER Star
 
 
Joined
Aug 20, 2003
Messages
2,521
Location
South Carolina
filthyrich said:
285 roughly= 32.7X11.5
305 roughly= 33x12.5

305 is bigger and wider and heavier
The wider and heavier part always holds true but manufacturers often match on the hieghts between 285's and 305's on R16's. I've got Mud tire sizes handy so here they are if anyone is interested:


BFG Mud Terrain KM
LT285/75R16/D 33.1 11.3 3305@65
LT305/70R16/D 33.1 12.2 2910@50
LT315/75R16/D 34.8 12.3 3195@50

Goodyear MT/R
LT285/75R16/D 33.0 11.2 3305 @ 65
LT305/70R16/D 33.0 12.2 2910 @ 50
LT315/75R16/D 34.8 12.3 3195 @ 50

Swamper SSR
LT285/75R16/D 33.9 11.4 3305 @ 65
LT305/70R16/D 33.9 12.4 2910 @ 50
 

Landpimp

GOLD Star
 
 
Joined
Mar 14, 2003
Messages
16,104
Location
Gig Harbor WA
nothing is wrong with them.........but if I can go up in size a wee bit then I would like to. and no I really don't think I want to run 35's

prolly go with the 305's.

e9999 said:
what's wrong with 285s?
unless you plan on spending your life on the rocks, 35s are not really necessary IMHO
 

Jim_Chow

 
 
Joined
Apr 28, 2003
Messages
2,480
Location
Turquoise Trail, N NM
With the 285's, can you notice a difference in acceleration over stock-sized tires? Since there don't seem to be any LC100 gears in lower ratios, has anyone regeared the t-case? I've only seen t-case gears 10% lower, but that'll offset increasing the tire diameter by 3".
 

Landpimp

GOLD Star
 
 
Joined
Mar 14, 2003
Messages
16,104
Location
Gig Harbor WA
I didn't notice any difference........but then again I was use to 3fe's and 2f's ;)

Jim_Chow said:
With the 285's, can you notice a difference in acceleration over stock-sized tires? Since there don't seem to be any LC100 gears in lower ratios, has anyone regeared the t-case? I've only seen t-case gears 10% lower, but that'll offset increasing the tire diameter by 3".
 

DBrown2

 
Joined
Mar 7, 2005
Messages
602
Location
Dayton, TN
The 305's to me clearly fill the fenderwell much better, plus gives more tread showing. Thus gives a more aggressive look, due to the width.
 

e9999

You want to do what...?
Moderator
 
 
Joined
Sep 21, 2003
Messages
16,660
Location
US
why is everybody so into tire looks?

just get the smallest tire that will do the job! If you think the extra inch will prevent you from gettng stuck in sand or from slipping down the mountain, then great. If not, why bother...?

Bigger / wider tires are more expensive, harder to find in a pinch, and introduce ride and suspension complications.

Function over form, folks!
 

macneill

Rollin’ on 33s
Joined
Jun 2, 2004
Messages
4,062
Location
Port Washington, NY / Edgartown, MA
e9999 said:
why is everybody so into tire looks?

just get the smallest tire that will do the job! If you think the extra inch will prevent you from gettng stuck in sand or from slipping down the mountain, then great. If not, why bother...?

Bigger / wider tires are more expensive, harder to find in a pinch, and introduce ride and suspension complications.

Function over form, folks!
And we should just drive Saturns since we're only just going from Point A to Point B. ;p
 

Jim_Chow

 
 
Joined
Apr 28, 2003
Messages
2,480
Location
Turquoise Trail, N NM
e9999 said:
why is everybody so into tire looks?

just get the smallest tire that will do the job! If you think the extra inch will prevent you from gettng stuck in sand or from slipping down the mountain, then great. If not, why bother...?

Bigger / wider tires are more expensive, harder to find in a pinch, and introduce ride and suspension complications.

Function over form, folks!
Don't forget that bigger tires also means more rolling resistance, a much higher moment of inertia (slower acceleration), and more windage due to being up higher. All this translates into fewer mpg's. Ideally, you'd have a dedicated set of offroad tires like 305's and get by w/ the 285's around town.
 

NorCalDoug

problems solved daily...
 
Joined
Oct 27, 2003
Messages
6,285
Location
uhhhh...duh...Northern CA
filthyrich said:
285 roughly= 32.7X11.5
305 roughly= 33x12.5

305 is bigger and wider and heavier
Wider and heavier, sure. Taller? No. I should've said taller.
All manufacturers will vary in actual size of their tires, but mathematically, the 305s are a fraction of an inch smaller in diameter than 285s.

Here's the boring math...
285/75 R16 is a 285mm wide tire, of which, 75% of that width is the distance between the outside edge of the tire and the inside (wheel touching) edge, on a 16" wheel
-- 75% of 285mm is 213.75mm = distance between the outside and inside edge of the tire.
-- 70% of 315mm is 213.50mm = distance between the outside and inside edge of the tire.

-- divide 213.75 and 213.50 both by 25.4 (the number of mm per inch) to get 8.415354" and 8.405512" respectively. Multiply these numbers by 2 and add 16" and the end result is:

285/75 R16 = 32.83071" in height
315/70 R16 = 32.81102" in height

285s are taller... ;p
 

wngrog

SILVER Star
 
 
 
Joined
Feb 10, 2002
Messages
29,961
Location
Canton, Mississippi
Bigger tires also separate you frim the mall guys to us non-100 guys.

I see a lifted 100 and I know I can strike up a Cruiser conversation :D
 
Top Bottom