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ZUKIWORLD Discussion Forum => Suzuki 4x4 Forum => Topic started by: Fasta76 on June 02, 2007, 10:45:43 PM

Title: 31-10.5-15 or 31-12.50-15??
Post by: Fasta76 on June 02, 2007, 10:45:43 PM
HEy guys i was thinking of putting 31-12.50-15 tsl swampers on insted of 33-12.50-15. <ost seem to say that 33 are a little to big for stock diffs! But is that because they are to wide or to tall? Would a 33-10.50-15 be better??? Would 5.13 gears be better for 31 or 33" tires?
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: Fasta76 on June 03, 2007, 07:19:14 AM
someone must have some input here!!
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: john1974 on June 03, 2007, 08:31:41 AM
on what rig, tracker? Sammy? sidekick?... t-case gears? stock?

5.12's usually are whats rated for 33's  I currently run 31x10.5's with my 5.12's in a 3 speed auto tracker.... 

depending on the wheeling you do you can get away with 33's on stock axles, couple people I have known for years on there sammys have done so.  But of course its more stress, and as I send if you do alot of rough wheeling you could run into a broken axle shaft or two.

Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: Fasta76 on June 03, 2007, 09:18:36 AM
86 sammy,1.6 8 valve swap,lockright locker in the rear,stock t-case for now. It would be nice to have 33" for the extra height. Do guys find a huge benefit from going from 31" to 33" tires?
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: Mikerpm4x4 on June 03, 2007, 09:32:03 AM
It really depends on your driving style. I would go 33s as wide as possible, but thats me. :-\ Is it also going to be street drivin? Stock gears? Locked? Do you have a heavy foot or are you more of a crawler? Need more info.

Mike
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: Fasta76 on June 03, 2007, 09:41:28 AM
1.6 8 valve , 5.13 gears, stock t-case. I drive it somtimes to work. About 30km round trip. Im looking at TSL, TSL-SX, TSL Radials.. I would like boggers but they would for sure beak stuff!!
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: fieroboy_gt on June 03, 2007, 12:02:52 PM
I'v always ran 33 on my sammi, transfer case stock no lockers an I beat the hell out of it an every year I replace a rear end I run a thin tire 33x10,50x15 to try an put less wear on the vehichle an there better in mudd. I upgraded from 31 like 3 years ago an found the 33 more tippy. so I bout 2 inch spacers an longer whell studds an it kinda evens it out. but i have rolled it on average of 1 a year with or with out the 33's so go figure
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: Jeremiah on June 03, 2007, 01:29:27 PM
Diff gears are always a good idea when going that big. The rest is personal prefrence...

I'm not a fan of going larger than 31" on a Sami, as things start breaking a lot more often. Frankly, I'm a minimalist. I like to keep things simple - I don't like broken things. Some people don't care if they break things, so they just keep going bigger and bigger....
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: Fasta76 on June 03, 2007, 02:23:38 PM
Thanks for the input guys!! Would 5.13 be way to much gear for 31" tires
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: copperfever on June 03, 2007, 03:36:23 PM
I ran 31x11.50's on my '88 with stock gears. It was a little sluggish on the highway, but did great offroad.
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: Mikerpm4x4 on June 03, 2007, 05:46:53 PM
Thanks for the input guys!! Would 5.13 be way to much gear for 31" tires

It will be wound up with 31s but zuks kinda like that. If you go to a 33 get a tire that is less agressive to keep the axles alive.

Mike
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: Fasta76 on June 03, 2007, 09:36:41 PM
would most of you guys run a 33/10.50/15 over a 31/12.50/15?
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: bzzr2 on June 04, 2007, 07:16:37 AM
i think rotational mass is a factor here for durability.  how much does a 31x12.5 weigh when compared to a 33x10.5?
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: Mikerpm4x4 on June 04, 2007, 02:43:49 PM
i think rotational mass is a factor here for durability.  how much does a 31x12.5 weigh when compared to a 33x10.5?

Depends on the tire. 31 inch Swamper ssr vs a 33 125 BFG mud terrain, the swamper is at least 25% heavier.

Mike
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: Mac500r on June 04, 2007, 10:22:21 PM
I recommend a  31-32 x10.50-15 tire unless you plan on changing axles.
I would go with a radial mud tire that is not quite as aggressive.Less breakage and longer lasting on hard surface with adequate traction.
Just my 2 cents worth:-)
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: j2custom on June 04, 2007, 10:45:27 PM
Quote
I would go 33s as wide as possible, but thats me.

Mike, what are the benefits of  running a wide tire?  Do you find the sami or side/track has enough weight to get the best traction with a wide tire?  I know you're running the pitbulls... How do the perform vs. the narrower tires?  Just curious.  I usually run the 12.50 versions, looking for input.  Thanks ;D
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: Fasta76 on June 05, 2007, 06:03:21 AM
Some of the guuys have siad that 5.13 would be way to much for 31" tires! So im thinking 33/10.50/15 TSL Radials!! What do you guys think?
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: bzzr2 on June 05, 2007, 06:44:15 AM
i love my swamper radials, mind you mine are only 31x9.5's.  not so bad on road and would not be able to complain off road.  drop em to 20 psi and perfect!  go swampers!

weight wise when i bought mine i was concerned that the swampers might be heavy, i don't recall the exact difference but between the tsl's and bfg mt's in 31 there was less than 3 pounds difference according to national 4wd.  of course my tires are a little narrower.
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: truckasaurus44 on June 05, 2007, 10:00:34 AM
The 33x10.5's w/ 5.13's should work great on the street and in most trails.  Plus the narrowed tire will cut down on the rolling resistance of the tire (no to mention making it easier to keep the tires off the springs and under the fenders at the same time w/o huge flares).  Only issue is the tires will tend to flex more side to side when steering at speed, but if you're thinking swampers, they're stiff enough where they should be fine.

If you do alot of rock crawling, consider a set of 4.16 t-case gears and some 4.62 gears in the diffs.  you'll get about the same hi-range gearing and the low range will be better for the rocks.   This was the route I was going to take before I got a nice deal on a set of 6.5 t-case gears and a $20 stock t-case to swap them into.
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: Bobzooki on June 05, 2007, 10:30:08 AM
Unlike Mike, who wheels like a maniac  ;D I have to say that when I went up to 33's, I felt I didn't need any more width - so I stuck with the BFG Mud Terrains in 33 X 10.50.  They've been nothing but perfect for the trails I wheel - Moab (slickrock - which isn't slick at all), and the rocky/sandy trails of the Rocky Mountains - almost no mud. 
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: Mikerpm4x4 on June 05, 2007, 11:57:29 AM
Quote
I would go 33s as wide as possible, but thats me.

Mike, what are the benefits of  running a wide tire?  Do you find the sami or side/track has enough weight to get the best traction with a wide tire?  I know you're running the pitbulls... How do the perform vs. the narrower tires?  Just curious.  I usually run the 12.50 versions, looking for input.  Thanks ;D

I wheel in soft terrain for the most part. Sand, snow, mud, and loose dirt. I dont want to find bottom. I want to float accross the top and dig down as little as possible. Wider tires also give more off camber stability and help flex better(more leverage on the springs).

Mike
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: Fasta76 on June 05, 2007, 04:42:09 PM
thanks for the help guys!!  I would love to do t-case gears also but i can get 2 sets of 5.13 for free!! Thats why i want to use them.. What would be a good t-case set to go with the 5.13 gears.
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: Mikerpm4x4 on June 05, 2007, 07:28:07 PM
thanks for the help guys!!  I would love to do t-case gears also but i can get 2 sets of 5.13 for free!! Thats why i want to use them.. What would be a good t-case set to go with the 5.13 gears.

I wouldnt go deeper than a 4 to 1 or it will be screamin on the hwy.

Mike
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: Fasta76 on June 05, 2007, 09:04:11 PM
who makes a 4.1 t-case gears? All i can find is 4.16-1??
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: Mikerpm4x4 on June 06, 2007, 08:59:18 AM
who makes a 4.1 t-case gears? All i can find is 4.16-1??

 Thats what I meant. ;D

Mike
Title: Re: 31-10.5-15 or 31-12.50-15??
Post by: Fasta76 on June 07, 2007, 09:37:11 PM
Funny!!