31-10.5-15 or 31-12.50-15??

Fasta76

31-10.5-15 or 31-12.50-15??

« 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?

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Fasta76

Re: 31-10.5-15 or 31-12.50-15??

« Reply #1 on: June 03, 2007, 07:19:14 AM »

someone must have some input here!!

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john1974

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Re: 31-10.5-15 or 31-12.50-15??

« Reply #2 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.

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Fasta76

Re: 31-10.5-15 or 31-12.50-15??

« Reply #3 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?

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Mikerpm4x4

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Re: 31-10.5-15 or 31-12.50-15??

« Reply #4 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

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Fasta76

Re: 31-10.5-15 or 31-12.50-15??

« Reply #5 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!!

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fieroboy_gt

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Re: 31-10.5-15 or 31-12.50-15??

« Reply #6 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

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Jeremiah

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Re: 31-10.5-15 or 31-12.50-15??

« Reply #7 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....

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Fasta76

Re: 31-10.5-15 or 31-12.50-15??

« Reply #8 on: June 03, 2007, 02:23:38 PM »

Thanks for the input guys!! Would 5.13 be way to much gear for 31" tires

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copperfever

Re: 31-10.5-15 or 31-12.50-15??

« Reply #9 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.

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Mikerpm4x4

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Re: 31-10.5-15 or 31-12.50-15??

« Reply #10 on: June 03, 2007, 05:46:53 PM »

Quote from: 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

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

« Last Edit: June 03, 2007, 05:58:19 PM by Mikerpm4x4 »

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Fasta76

Re: 31-10.5-15 or 31-12.50-15??

« Reply #11 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?

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bzzr2

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Re: 31-10.5-15 or 31-12.50-15??

« Reply #12 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?

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Mikerpm4x4

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Re: 31-10.5-15 or 31-12.50-15??

« Reply #13 on: June 04, 2007, 02:43:49 PM »

Quote from: 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?

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

Mike

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Re: 31-10.5-15 or 31-12.50-15??

« Reply #14 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:-)

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