I run 30" mongrols on 14x7 meathod bead locks all you need to do is the front fender mod basicly bring it back an inch and trim off the excess no issues at all!

 

so there is no rub on the rear fender flares?

 

correct i also cut off the mud flap mounts too forgot

 

Did you notice any power loss? Did you change anything with the clutching?

 

You cut your flares for 30s on a 900S ???? People are fitting 32s with just spring adjustment and one guy has 36s with spring spacers...I must be missing something

 

I'd like to see some pictures. ..

 

There on this forum

 

Polaris RZR S 900 Rock Crawling Review | UTV Guide

check this link out.

 

I don't have a 900-S yet, but looking at getting one and I've also been hearing you can fit 30" tires on with only shock adjustment. But Jon Crowley of UTV Guide did switched out is 900-S fenders with 900 trail fender caps and shock adjustment for King of the Hammers, because he was having rubbing problems with GBC 30" Mongrels. He is now running and will be running GMZ 30" Kahuna tires for KOH. But I was chatting with a guy on YouTube about this dad's 900-S and they are running 30" STI Roctanes with only shock adjustment, with no other mods. If and when I get me a 900-S I want to try to run either GMZ 30" Kahuna or Polaris 30" Moto Crawlers. But if I like the GBC Dirt Commanders that come stock, I might upgrade to the new 29" or 30" Dirt Commanders that's coming out real soon. I also would like to see y'all pictures of the bigger tires on your 900s.

 

I also wanna run 29 or 30 inch tires soon.... but I'm thinking I'm gonna stick with the stock rims. What are my options with that tire size in a 12 rim

 

That's going to be limited with 12" wheels, but there are a few. I just did a simple search on Rocky Mountain for 28"-30" tires that fit 12" wheels. Mostly mud tires, but there are a couple that are not. Depends on your riding preferences and how much you what to spend. There is a 30x10-12 ITP Blackwater, but they are kind of pricey. I hear great things about them, but they run smaller in height than what they say they are. A 30" Blackwater will probably be closer to 29". If I had that kind of money, I would go with Blackwaters. They are non-directional (so you can rotate them), with 1" lugs for mud, but they are an 8 ply tire for more trail use. They should be a great all around tire.

Found a picture of a Blackwater 30x10-14 compared to a Bighorn 27x11-12 on a Maverick forum. The guy went with STI 14" Beadlocks. But that's the size of the 30" Blackwater.

 

Rumor has it Pitbulls will be coming out with 30"ers soon

 

bone stock the day after I bought mine. No adjustments were made, no lift, no trimming anything and no rubbing anywhere. Tires measure 32'' tall and 8.5'' wide on 18'' wheels. And it will spin them over fine, I dug 25-30ft long sets of ruts in my yard 6'' deep when I punched it in low with the stock clutching. The arms on the 900S are 1'' forward and 1'' rearward when compared to the previous 800S model.



One with the cage I built and snorkles done with a full 35Quart pelican cooler in the back. Rear shocks were cranked down 1'' from the factory setting. Still no lift or trimming anything!

 

bone stock the day after I bought mine. No adjustments were made, no lift, no trimming anything and no rubbing anywhere. Tires measure 32'' tall and 8.5'' wide on 18'' wheels. And it will spin them over fine, I dug 25-30ft long sets of ruts in my yard 6'' deep when I punched it in low with the stock clutching. The arms on the 900S are 1'' forward and 1'' rearward when compared to the previous 800S model.

Wow, that's impressive. But yours is setup for mudding, technically you are not worry about the suspension bottoming out on jumps or rubbing when flexing. Have you tried jumping your RZR? If so and it did not rub then I'm sold. I wonder if it makes a difference that your tires are 8.5" wide and most 30" DOT tires are 10" wide. I trail ride and mudding is one of the last things I want to do. I like drifting, donuts, jumping, and on the occasion rock crawling. I know it sounds like I need a 1000, but I don't need that kind of HP and I would like to stay in the 60"-62" width. Again, nice RZR!

 

I fit 32s with Super Atv front arched A arms and adjusted shocks. Cutting it close in the rear though

 

I fit 32s with Super Atv front arched A arms and adjusted shocks. Cutting it close in the rear though

View attachment 119179

That stance, wheels and tires look awesome!

How much of an offset are your wheels? Do the tires measure actual 32"? About How far did you adjust your shock nuts?

 

So I've seen more and more 900-S going with the 29"-32". Some are putting SuperATV front forward arms, some switching the S fenders for trail fenders, some not doing anything but letting out the shocks. When I get my 900-S I would like to run 30" GMZ Kahuna tires. Besides Jon Crowley of UTV Guide, does anyone run the Kahuna tires on their 900-S, or even the 30" Mongrels or Polaris' Moto Crawlers? What did you do to make yours fit without rubbing? Thanks!

 

RZRbacks, The OP did not specify what type of riding he was doing, simply a will it fit question. If you have specific questions on fitment, do a suspension test by maxing out one arm at a time on compression and stroke and take measurements to see exactly how much room you have all the way around for tire fitment. From the look of the stock arms, I would not do too many jumps with this RZR. They are no where near the quality I would need to trust them making any jumps. Just my .02 My first ride on the tires I have pictured was 25 miles thru the woods, trails and mud holes. Crossed some ditches in a cross pattern to see if anything would bottom out and it didn't even with the tires turned all the way, so that should give some hope without doing your own actual testing. As I said before, my shocks were still factory set very soft for that test ride.

 

Thanks TJ. Flexing through ditches with no rubbing is a good answer. I don't do any big jumps, they are fairly small, but my 800-S with 28" Mongrels were bottoming out. But I think that second spring they put on the new 900-S shocks are keeping the tire from bottoming out.
I didn't want to buy 30" tires to find out they didn't work on the 900, that's why I am asking everyone.

 

Good luck turning tires that big without some Engine\gearing adjustments. You aren't going to go very fast...

 

If GMZ would make a 28" Kahuna I would get them. My 28" Mongrels caked to easily when going through light mud or wet clay when trail riding. Kahunas are said to clean out better.

 

They do. Mongrels are really hit and miss

 

I ordered 14x7 sti's with 6+1 offset for all 4 corners and am going to mount 30x10x14 mongrels this week. I'll report back on any clearance issues. Most of my riding is trail riding and don't hit any big mud often.


Sent from my iPhone using Tapatalk

 

Look forward to your results with this. Are you an S or Trail? Planning on those STI 6+1s on my Trail to try to keep close to 50" as possible.

 

With my 32'' tires on it stock, it would get up very fast from 0-46mph in first gear from 0-350ft and dig ruts in the yard when I took off. So I'm not seeing much of a problem with some 30'' tires on there. Didn't have enough room to run it out in high gear.

 

I'm on a S, I wanted to keep width as close to factory as possible


Sent from my iPhone using Tapatalk

 

What are the weight comparisons with these tires, I know bighorns are pretty heavy. Anyone know the weights of these 30" mongrels or kahunas compared to the stock 27" rzr s tires. I leaned towards the 28" Zillas, because they were 4-5lbs lighter per corner then the stock 26" bighorns

 

Mongrels are 33 lbs each for 30's. So they are just slightly heavier. Not enough difference to matter IMO


Sent from my iPhone using Tapatalk

 

I did just look that up. Kahunas are 32lbs mongrels are 33lbs for 30x10-14.. I can only find stocks with 14" wheels on gbc website. Seem to be 30lb rears 23lb fronts.

 

Yeah me too, should gain about 3+-lbs in rear and closer to 10+- on fronts. So not a whole lot heavier


Sent from my iPhone using Tapatalk

 

Clutch kit would get the back plus some

 

Yep. I'm gonna try them without first and see how it fairs


Sent from my iPhone using Tapatalk