YotaTech Forums  

Go Back   YotaTech Forums > Toyota SUV & Truck Tech > 86-95 Trucks & 4Runners
Sign in using an external account
Register Forgot Password?
Search


86-95 Trucks & 4Runners 2nd/3rd gen pickups, and 1st/2nd gen 4Runners with IFS

Welcome to Yotatech!
Welcome to Yotatech,

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!


Reply
 
LinkBack Thread Tools Search this Thread
Old 10-30-2009, 08:13 PM   #1
Registered User
Personal Sales Rating: (0)
 
Built2Grind's Avatar
 
Join Date: Aug 2009
Location: Arcadia, CA
Posts: 122
225/75/15 VS 31x10.50r15

this has been running around in my head for a while and could not find anything with the SEARCH button, anyway i was curious to see what your input is. what are the advantages/disadvantages with a 225/75/15(stock tire size)?? what are the advantages/disadvantages with a 31x10.50x15?? i know the obvious is smaller tire less top speed, easier acceleration, less ground clearance and the bigger tire would be more ground clearance(is it that significant?) and higher top speed but loss in power to the ground.
WHAT DO YOU THINK?
This ad is not displayed to registered members.
Register your free account today and become a member on Yotatech!
__________________
1994 Pickup, 22re, 5 speed, 2wd, stock for now. 200,000 miles.

1991 Pickup extra cab SR5, 3vz-e, 4x4, 5 speed, glasspack, swaybarless, 1.5" BJ spacer, 1" diff drop, manual hubs. 198,000 miles-SOLD
1991 4Runner SR5, 3vz-e, 4X4, automatic with radesigns baja shifter-DEAD-disintegrated transmission. 180,000 miles-SOLD
Built2Grind is offline   Reply With Quote
Old 10-30-2009, 08:25 PM   #2
Registered User
Personal Sales Rating: (0)
 
abecedarian's Avatar
 
Join Date: Mar 2008
Location: Temecula Valley, CA
Posts: 12,684
given same engine output and final drive ratios for both:
smaller tire means less rotating mass, consequently meaning less power required to turn it hence more torque to the ground and better ability to maintain speed and likely a higher top speed in any particular gear.
larger tire means greater rotating mass hence requires more torque to turn it and maintain speed thus lower top speed in any particular gear
additionally, the smaller tire presents a smaller frontal cross-section thus lower wind resistance than the larger tire, consequently less aerodynamic drag with the smaller tire versus the larger tire which also leads to a higher top speed in any particular gear with the smaller tire.
__________________
Proud member of Yotatech's 12000+ post club.


Last edited by abecedarian; 10-30-2009 at 08:26 PM.
abecedarian is offline   Reply With Quote
Old 10-30-2009, 08:29 PM   #3
Registered User
Personal Sales Rating: (0)
 
abecedarian's Avatar
 
Join Date: Mar 2008
Location: Temecula Valley, CA
Posts: 12,684
You'll only get a higher top speed with a larger tire when compared to a smaller tire and using the same gear ratio(s) if the engine has sufficient power to overcome aerodynamic resistance.
Given the same gear ratios and sufficient power, the larger tire can result in higher speeds but the smaller tire will allow the vehicle to accelerate more quickly provided traction can be maintained during acceleration.
__________________
Proud member of Yotatech's 12000+ post club.

abecedarian is offline   Reply With Quote
Old 10-30-2009, 09:23 PM   #4
Registered User
Personal Sales Rating: (0)
 
Built2Grind's Avatar
 
Join Date: Aug 2009
Location: Arcadia, CA
Posts: 122
im running 31x10/5s now, anyone know the actual inch diameter of the 225's? my sticker in the door says 225/75/15 which is why im asking.
__________________
1994 Pickup, 22re, 5 speed, 2wd, stock for now. 200,000 miles.

1991 Pickup extra cab SR5, 3vz-e, 4x4, 5 speed, glasspack, swaybarless, 1.5" BJ spacer, 1" diff drop, manual hubs. 198,000 miles-SOLD
1991 4Runner SR5, 3vz-e, 4X4, automatic with radesigns baja shifter-DEAD-disintegrated transmission. 180,000 miles-SOLD
Built2Grind is offline   Reply With Quote
Old 10-30-2009, 09:30 PM   #5
Registered User
Personal Sales Rating: (0)
 
abecedarian's Avatar
 
Join Date: Mar 2008
Location: Temecula Valley, CA
Posts: 12,684
Quote:
Originally Posted by Built2Grind View Post
im running 31x10/5s now, anyone know the actual inch diameter of the 225's? my sticker in the door says 225/75/15 which is why im asking.
maybe check here:
http://www.therangerstation.com/tech...nch_Tires.html
225/75R15=28.3 inches
__________________
Proud member of Yotatech's 12000+ post club.

abecedarian is offline   Reply With Quote
Old 10-30-2009, 09:32 PM   #6
Registered User
Personal Sales Rating: (0)
 
abecedarian's Avatar
 
Join Date: Mar 2008
Location: Temecula Valley, CA
Posts: 12,684
I have a 255/70R16 on my 4Runner (in my avatar) which calculates out to a 30.1" z 10" wide tire.
I also have a 4" suspension lift.
__________________
Proud member of Yotatech's 12000+ post club.

abecedarian is offline   Reply With Quote
Old 10-30-2009, 09:33 PM   #7
Registered User
Personal Sales Rating: (0)
 
camo31_10.50's Avatar
 
Join Date: Aug 2007
Location: Vian, OK
Posts: 5,334
just because the door jamb tag says 225/75's...doesn't mean he has 4.10 gears..the axle code is where its at

my '92 4runner says it came with stock 225/75 tires..but my gear code says otherwise...G254..which means 4.56's..which means HOT DANG im lucky..lmao
__________________
I'm Roalin' Coal now.

2001 Dodge 3/4 ton cummins, 6speed, QCSB, 35's on 18's, straight piped, cattleman front bumper. CAI, and superchips tune.
camo31_10.50 is offline   Reply With Quote
Old 10-30-2009, 09:38 PM   #8
Registered User
Personal Sales Rating: (0)
 
Built2Grind's Avatar
 
Join Date: Aug 2009
Location: Arcadia, CA
Posts: 122
that site said it was 28.3" tall, so its anywhere from 1-2" taller and about 1-1.5" wider. the smaller tire also seems to cost less but its harder to find aggressive off road tires. so next tire change ill try out the 225's unless anyone has any contradictions.
__________________
1994 Pickup, 22re, 5 speed, 2wd, stock for now. 200,000 miles.

1991 Pickup extra cab SR5, 3vz-e, 4x4, 5 speed, glasspack, swaybarless, 1.5" BJ spacer, 1" diff drop, manual hubs. 198,000 miles-SOLD
1991 4Runner SR5, 3vz-e, 4X4, automatic with radesigns baja shifter-DEAD-disintegrated transmission. 180,000 miles-SOLD
Built2Grind is offline   Reply With Quote
Old 10-30-2009, 09:40 PM   #9
Registered User
Personal Sales Rating: (0)
 
Built2Grind's Avatar
 
Join Date: Aug 2009
Location: Arcadia, CA
Posts: 122
where can i find the axle code, it it on the diff?
__________________
1994 Pickup, 22re, 5 speed, 2wd, stock for now. 200,000 miles.

1991 Pickup extra cab SR5, 3vz-e, 4x4, 5 speed, glasspack, swaybarless, 1.5" BJ spacer, 1" diff drop, manual hubs. 198,000 miles-SOLD
1991 4Runner SR5, 3vz-e, 4X4, automatic with radesigns baja shifter-DEAD-disintegrated transmission. 180,000 miles-SOLD
Built2Grind is offline   Reply With Quote
Old 10-30-2009, 09:42 PM   #10
Registered User
Personal Sales Rating: (0)
 
abecedarian's Avatar
 
Join Date: Mar 2008
Location: Temecula Valley, CA
Posts: 12,684
Quote:
Originally Posted by camo31"10.50" View Post
just because the door jamb tag says 225/75's...doesn't mean he has 4.10 gears..the axle code is where its at

my '92 4runner says it came with stock 225/75 tires..but my gear code says otherwise...G254..which means 4.56's..which means HOT DANG im lucky..lmao
all I can say is
__________________
Proud member of Yotatech's 12000+ post club.

abecedarian is offline   Reply With Quote
Old 10-30-2009, 09:54 PM   #11
Registered User
Personal Sales Rating: (0)
 
a4runnerfreak's Avatar
 
Join Date: Jul 2008
Location: Grew up in S.C.V, So Cal.....now in Hampstead, NC
Posts: 4,581
Send a message via Yahoo to a4runnerfreak
Both my '91 4x4's, my old truck with the 225/75/15 tire came with 4.56's, and my 4Runner with the 31's has 4.56's.

My 1st Toyota 4x4, an '84 with the 225/75/15 tire, came with 4.10's
__________________
Quote:
Originally Posted by waskillywabbit
Wheel IFS. Wheel SAS. Wheel your big wheel. Just wheel.
Quote:
Originally Posted by fustercluck View Post
Now if he has broken the law, then he should spanked on his flabby pink bottom in public by oompa loompas.
Quote:
Originally Posted by girl_face View Post
tony! where have you been all my life?


------------------------------------------------------
1991 Toyota 4Runner SR5 4x4, 3.0 V6, Auto <---R.I.P

NEW!!!
1994 4Runner SR5 V6, 3.0 V6 Auto, Sony XPLOD CDX-GT540 UI, 31x10.5's, *4.88's*
a4runnerfreak is offline   Reply With Quote
Old 10-30-2009, 10:03 PM   #12
Registered User
Personal Sales Rating: (0)
 
Built2Grind's Avatar
 
Join Date: Aug 2009
Location: Arcadia, CA
Posts: 122
g294?:edit: found it....i have 4.10's but i did find some tires....http://www.cricripneus.com.br/images/produtos/12.jpg Click the image to open in full size.
__________________
1994 Pickup, 22re, 5 speed, 2wd, stock for now. 200,000 miles.

1991 Pickup extra cab SR5, 3vz-e, 4x4, 5 speed, glasspack, swaybarless, 1.5" BJ spacer, 1" diff drop, manual hubs. 198,000 miles-SOLD
1991 4Runner SR5, 3vz-e, 4X4, automatic with radesigns baja shifter-DEAD-disintegrated transmission. 180,000 miles-SOLD

Last edited by Built2Grind; 10-30-2009 at 10:16 PM.
Built2Grind is offline   Reply With Quote
Old 10-30-2009, 11:01 PM   #13
Registered User
Personal Sales Rating: (0)
 
Join Date: Mar 2009
Location: Kenai, AK
Posts: 359
To the original poster:

The advantages and disadvantages lie in what you want to use the truck for. If its a daily driver that sees occasion easy trails, the smaller tires in an AT tire will give you slightly better mileage, quieter ride, better road manners and slightly better accelleration.

If you want to run tough trails without completely ruining the commutability (new word!) of your truck, put on some 31-10.50 MTs and get another inch or two of clearance, i've seen an inch or two make the difference between getting stuck and not on several occasions.

There was actual an article online i found once where a fella put on 31-10.50s, a locker and a winch on an otherwise stock toyota and followed a bunch of highly modded trucks all over MOAB, pretty cool article.
limon32 is offline   Reply With Quote
Old 10-31-2009, 06:56 AM   #14
Contributing Member
Personal Sales Rating: (0)
 
Marc's Avatar
 
Join Date: Sep 2003
Location: Winnipeg, MB, Canada
Posts: 1,030
I have 2 almost identical 4runners.
Both are 3.0 auto's with 4.56 gears.

The 91 has 31" tires and will not hold O/D when pulling even a small trailer.
Sometimes it won't hold O/D going into a head wind.

The 90 has 235/15 tires and will hold O/D when pulling a 1500 lb trailer and always works into a headwind.

Fuel mileage sucks on both.
__________________
'91 4Runner SR5 V6 4X4 Auto, A/C, 4.56, 31x10.5x15 Nokian Vatiiva Tires, Taurus fan (removed)
'90 4Runner SR5 V6 4X4 Auto, A/C, 4.56
V6 power with V8 fuel mileage
I've used Fram oil filters and dino oil in all my stuff for 30 years and never had oil related trouble

Last edited by Marc; 10-31-2009 at 06:58 AM.
Marc is offline   Reply With Quote
Old 10-31-2009, 08:49 AM   #15
Registered User
Personal Sales Rating: (0)
 
Built2Grind's Avatar
 
Join Date: Aug 2009
Location: Arcadia, CA
Posts: 122
i definitely have problems pulling any kind of hill at freeway speeds, i think the cost and hassle of putting in gears is not worth it compared to the benefits of having the correct tire size, the difference in size is only about 2 inches so that means i only have 1 less inch in ground clearance. if i get a 2 inch lift(which i was planning on doing anyway) that puts me an inch above where i am now. less tire mass, smaller tire, means i can put less stress on steering components, be able to go faster than 50 on a steep grade, get better mileage, and less unsprung weight. with the bigger tire the obvious advantages i see are 1 more inch of ground clearance and a bigger footprint for more traction. i think im going to go back to the stock tire size, put in an aussie or a lock-right(i haven't decided yet) and get a 2 inch lift until i have problems with ground clearance.
__________________
1994 Pickup, 22re, 5 speed, 2wd, stock for now. 200,000 miles.

1991 Pickup extra cab SR5, 3vz-e, 4x4, 5 speed, glasspack, swaybarless, 1.5" BJ spacer, 1" diff drop, manual hubs. 198,000 miles-SOLD
1991 4Runner SR5, 3vz-e, 4X4, automatic with radesigns baja shifter-DEAD-disintegrated transmission. 180,000 miles-SOLD
Built2Grind is offline   Reply With Quote
Old 10-31-2009, 10:47 AM   #16
Registered User
Personal Sales Rating: (0)
 
pruney81's Avatar
 
Join Date: Jan 2005
Location: Leadville Colorado
Posts: 1,600
You can get a nice set of Yokohama geolander a/t's or bfg a/t's in a 235/75/15 on http://www.tirerack.com/ for reasonable rates. That's what I plan on doing whenever the tires I have now wear out. I like the good performance on the street with option of taking it offroad if I need to.
__________________
1990 22RE 4WD 5 speed
156K original miles

Last edited by pruney81; 10-31-2009 at 10:50 AM.
pruney81 is offline   Reply With Quote
Old 10-31-2009, 12:00 PM   #17
Registered User
Personal Sales Rating: (0)
 
Join Date: Mar 2009
Location: Kenai, AK
Posts: 359
Quote:
Originally Posted by pruney81 View Post
You can get a nice set of Yokohama geolander a/t's or bfg a/t's in a 235/75/15 on http://www.tirerack.com/ for reasonable rates. That's what I plan on doing whenever the tires I have now wear out. I like the good performance on the street with option of taking it offroad if I need to.

Good call, i've had both tires and I think the bfg's have better mud performance, my 2 cents.
limon32 is offline   Reply With Quote
Old 10-31-2009, 12:07 PM   #18
Registered User
Personal Sales Rating: (0)
 
Built2Grind's Avatar
 
Join Date: Aug 2009
Location: Arcadia, CA
Posts: 122
i have been searchin around and i found out that a set of 4.88 gears and 4 new 225/75/15's are about the same price....hmmm now i have no idea what to do. gears would be a pain to do on the front maybe not so much the back? but tires are easy. is 1 more inch of ground clearance really worth it?
__________________
1994 Pickup, 22re, 5 speed, 2wd, stock for now. 200,000 miles.

1991 Pickup extra cab SR5, 3vz-e, 4x4, 5 speed, glasspack, swaybarless, 1.5" BJ spacer, 1" diff drop, manual hubs. 198,000 miles-SOLD
1991 4Runner SR5, 3vz-e, 4X4, automatic with radesigns baja shifter-DEAD-disintegrated transmission. 180,000 miles-SOLD
Built2Grind is offline   Reply With Quote
Old 11-01-2009, 11:37 AM   #19
Registered User
Personal Sales Rating: (0)
 
Join Date: Mar 2009
Location: Kenai, AK
Posts: 359
You still haven't answered to most important question, what do you want to do with the truck?
limon32 is offline   Reply With Quote
Old 11-01-2009, 12:04 PM   #20
Registered User
Personal Sales Rating: (0)
 
Built2Grind's Avatar
 
Join Date: Aug 2009
Location: Arcadia, CA
Posts: 122
i would like to have a pretty capable trail rig but still keep it as my dd. i was planning on a 2 inch lift, bj spacers up front and new leafs out back, aisin manual hubs, good skid plate, onboard air, twin stick, rear locker, rock sliders, etc.
__________________
1994 Pickup, 22re, 5 speed, 2wd, stock for now. 200,000 miles.

1991 Pickup extra cab SR5, 3vz-e, 4x4, 5 speed, glasspack, swaybarless, 1.5" BJ spacer, 1" diff drop, manual hubs. 198,000 miles-SOLD
1991 4Runner SR5, 3vz-e, 4X4, automatic with radesigns baja shifter-DEAD-disintegrated transmission. 180,000 miles-SOLD
Built2Grind is offline   Reply With Quote
Old 11-01-2009, 12:04 PM
Yotatech
4WD Truck




Paid Advertisement
Reply

Tags
10, 15, 225, 22575, 23575, 31, 31x105x15, 50, 75, actual, diameter, inches, loss, power, r15, size, tire, tires

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -8. The time now is 02:31 PM.


2010 InternetBrands, Inc.