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I'm still debating portals vs long travel vs leave it alone... I could use some advice.

Car in question is a 17 XP4T. stock width & geometry high clearance a-arms, radius rods, frame stiffener, full skid plate and 32" tires on 14" 5+2 beadlocks. Stock gearing in transmission. Shocks revalved and sprung for current setup.
This car is my primary crawler, but kept mild due to it being a back up sand car. We take a few trips per year where all five of my family ride and drive. Only three seats between the two primary sand cars thus this one has to come too.

I want to run 35" tires in the rocks, but I still need this car to handle moderate dune riding a few times per year.
Thus the dilemma. Not super stoked with options 4-6 at present, but listed to be thorough.
Option 1: 30% portals, forward a-arms, +/- steering upgrades, stock trans gearing
Option 2: long-travel set up (like superatv, but (not sure a 35" fits with their +6" kit). Regear trans.
Option 3: 15% portal to maintain a bit of wheel speed for the rare dune days. stock trans.
Option 4: leave it alone, then proceed with option 5 or 6 in 1-2 years.
Option 5: sell it and buy something else
Option 6: buy a fourth car

thx, Law
 
Discussion starter · #62 ·
So a lot of questions:

1) Rims for portal cars: I would only use a 6/1 or 5/2 offset rim. The larger the offset the harder the steering will become and the more feedback felt. On a 14" rim the wheel will be very close to the brake line. 15" rims provide more clearance and offer more large tire options.

2) Max tire size is 33" without rubbing the fender well (stock offset arms).

I want to run 35" tires in the rocks, but I still need this car to handle moderate dune riding a few times per year.
Combination of your Options 1 + 2 = awesome (y)

SATV LT, 30% portals, 6/1 rims, ST Stage 4, 53/13/13 trans reduction, 35-39" tires
 
a few tire and wheel questions...

SuperATV recommends max of 33" tires on 4" portals without forward A-arms.
Any feedback on running 34" tires with 4" portals and stock geometry arms? I understand the massive scrub radius swings the tire toward the fender...

Superatv lists a 14" wheel as acceptable for 4" portals. @RZR_Joe lists 15".
Why the difference?
What is the maximum backspacing with a 14" wheel?
What is the maximum backspacing with a 15" wheel?

TIA, Law
You can probably get away with a 34" tire. The 33" is a true measurement before any tire rub...but that's at extreme full compression and full turn. If you're ok with a little rub, you'll be ok. Plus, your 34" will likely measure short anyway. And....if you have any aftermarket shock work, it'll add a little lift and give you a little more tire clearance.

The 14" wheel is the absolute minimum. A 15" is better because it'll give you a little relief if you happen to get a rock stuck between the wheel and the portal.

You shouldn't go over a 4-1/2" back spacing with a 14" or 15" wheel. The 15" will give a little more relief, but you have to be careful how you route your brake lines.
A 16" wheel will be ok with up to 5" backspacing....but then you run into less tire options for a 16" wheel.
You can use wheel spacers if you want, which will help with that backspacing.


EDIT: And @RZR_Joe is dead-on with all of the above, but I'm not supposed to stray from my "official" requirements. :ROFLMAO:
 
Thanks for the prompt response.
Combination of your Options 1 + 2 = awesome (y)

SATV LT, 30% portals, 6/1 rims, ST Stage 4, 53/13/13 trans reduction, 35-39" tires
I'd love to replicate the Trail Punisher, but I failed to mention this car has to go on a UTV rack which is limited to 78" wide. It has to be one or the other. Way too much invested in getting "3 cars on the sand" to change out the tow pig and trailer... yet.
 
Thank you as well. DM sent.
You can probably get away with a 34" tire. The 33" is a true measurement before any tire rub...
The 14" wheel is the absolute minimum. A 15" is better...
You shouldn't go over a 4-1/2" back spacing with a 14" or 15" wheel...
 
I'd go with a trans gear reduction and forward arms in that case.
Interesting. certainly keeps the car more sand friendly. Probably the compromise I'm looking for.
SATV lists 1.5" and 2" forward a-arms. Seems like a minor difference to offer both. The 2" includes tie-rods. Are these the same as SATV HD tie-rods I already have?

ETA: forward A-arms do not eliminate portals in the future like a long-travel kit would. Definitely intrigued...

Thank you again
 
You can’t beat portals in the rocks, so if that’s primary use. You really think 30% is too much wheel speed reduction in sand? I know nothing of sand, but the thing will still do at least 60mph. I ran 4” portals and 1.5” arms with 37s, could do at least 38s. Just got to take the flares off, trim a little plastic, and put them back on, bend the bottom back 1.5-2” and drill new holes, use machine screws with washer on the back. To go further than that, you’d need to take a heat gun and a little persuasion to the foot well.
 
...You really think 30% is too much wheel speed reduction in sand? I know nothing of sand, but the thing will still do at least 60mph.
Hard to say having never tried them. According to SATV 60 mph with 35s would be about 70mph on the stock car with 29s. Tire choice will be very important. I assume I'll have to play with clutching as well...

I ran 4” portals and 1.5” arms with 37s
Nice to hear bigger is possible with a bit of plastic manipulation. Any write-ups or photos of the plastic work?
 
I may have got a bit off in my reply. But what I mean, I think you could do 35s with just the 4” portals and a little trimming. For the plastic work, it’s really simple. Just pull the 2 lower screws out of a flare and pull it back, draw a line against it and cut. You have the tube frame back there behind the plastic so that’s your limit, but I think you can get as much with simple plastic trimming as you can with 1.5” offset arms.

With 4” portals, standard a-arms, trimmed fenders, and 37s, it rubbed lightly on the foot wells. After adding 1.5” a-arms it didn’t rub anymore. I never tried the 35s before changing the a-arms, but think they’d clear. Surely 34s would clear.
 
Interesting. certainly keeps the car more sand friendly. Probably the compromise I'm looking for.
SATV lists 1.5" and 2" forward a-arms. Seems like a minor difference to offer both. The 2" includes tie-rods. Are these the same as SATV HD tie-rods I already have?

ETA: forward A-arms do not eliminate portals in the future like a long-travel kit would. Definitely intrigued...

Thank you again
They would be the same tie rods. They are needed for the extra adjustment necessary.

Honestly, for you in the sand I wouldn't worry about the 2" forward. That little 1/2" makes a HUGE difference in tire fitment, but it'll also cut down more of your steering radius, and I think you'd be happier with the 1.5" forward if you want to go with the portals in the future. The 2' forward is great for throwing huge tires in without a lift or portals...definitely a plus for the mud guys....or guys that aren't going to run portals but want BIG tires.
 
The portals will give you another 1/2 inch forwards offset also.
 
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Reactions: SuperATV and Law.74
Was wondering if anyone has ever ripped out the holes in the cast hubs were the bottom radius rod mounts? Was trail ridding was climbing a hill got to the to and the person in the group said I broke it at the bottom of the hill. Only had 2 rides on them since I installed was told SUPERATV would replace them under warranty. But I would like something like this not to happen again any advice on solution to fix problem.
 
Was wondering if anyone has ever ripped out the holes in the cast hubs were the bottom radius rod mounts? Was trail ridding was climbing a hill got to the top and the person in the group said I broke it at the bottom of the hill. Only had 2 rides on them since I installed was told SUPERATV would replace them under warranty. But I would like something like this not to happen again any advice on solution to fix problem.
 
Was wondering if anyone has ever ripped out the holes in the cast hubs were the bottom radius rod mounts? Was trail ridding was climbing a hill got to the top and the person in the group said I broke it at the bottom of the hill. Only had 2 rides on them since I installed was told SUPERATV would replace them under warranty. But I would like something like this not to happen again any advice on solution to fix problem.
Your radius rods were probably bolted down too tight. Guessing you have aftermarket radius rods too. There is a TON of variation in the size of aftermarket rods and rod ends, and there are a few brands that are just too big....and cause your issue.
 
I have a question y’all may be able to answer for me lol, I’m trying to get the circumference measurement for a 8” portal on a Polaris RZR 1000xp? A local customer of mine wants to put led lights around the outside of them but I can’t seem to find any measurements anywhere, please help? TIA
 
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