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Discussion Starter #1 (Edited)
My XP is street legal and we often ride a lot on roads anyways in our area jumping from trail system to trail system.

I'm considering replacing my 14" Big Horn Radials (originals, not the 2.0) with some DOT tires but the tire sizing throws me a little...
Most small light truck tires are designated with sizes such as "P225/60R14" but of course our tires are simply 27x11x14 rear and 27x9x14 front.

Does anyone know what size in the P format is equivilant to the 27x11x14 and 27x9x14 sizes?
Or if I want to split the difference and go with the same size using a 10" wide all the way around what tire size in the P system is equivilant to a 27x10x14 ...?


The other question is does anyone know the weight of a Big Horn or Rip Saw R/T tire in these kind of sizes, or maybe just the average size for ATV tires in a 27" size?
(So I can compare it to the weight of small light truck tires, assuming I can find manufacturers who list the weights)
 

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Discussion Starter #2
Follow up Question...

Has anyone already found a really good small light truck tire in a mud-terrain or agressive all-terrain in the correct sizes and not too heavy that works good on the XP900's ...?
 

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Discussion Starter #5
What is the height/width compared to stock and do you know how much weight they added? Could you feel any noticable extra drag on the machine from the extra weight? Those look like they might be heavy.

Oh, and I can't read it in your pics, Beyond being 14" what is the actual size of them?
 

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Discussion Starter #6
I figgured out from your picture that those must be the SSR model in a 27x9.5x14 and weigh 37 pounds each. Their new SS-M16 sure is a nice looking tire but the smallest size available is a 15x31.

I noticed the TSL Bias-Ply is also available in a 14" at only 31 pounds in a 28x8.5 but I think I'd like to stick with radials.


I still need to find out how much stock tires like the Big Horns weigh, I haven't been able to find that to compare it to.
 

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Here's a link to a couple different charts that compare passenger car
tire sizes. They are both Microsoft Word Documents. If you click the
links it will ask you if you want to open them.

TIRE_HEIGHT_CHART

Tire_Size_Charts
 

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I am running 215/75/15 BFG Mud Terrain M/T KM2's on all 4.

215/75/15 = 27.7x8.5/15

They weigh 34lbs each. Do great on the trail and on the road. They should outlast the RZR too.




 

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I figgured out from your picture that those must be the SSR model in a 27x9.5x14 and weigh 37 pounds each. Their new SS-M16 sure is a nice looking tire but the smallest size available is a 15x31.

I noticed the TSL Bias-Ply is also available in a 14" at only 31 pounds in a 28x8.5 but I think I'd like to stick with radials.


I still need to find out how much stock tires like the Big Horns weigh, I haven't been able to find that to compare it to.
My SS are 27x9.5x14

And my UTV spare tire weighs 40 lbs with the steel rim.
 

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Discussion Starter #11
I am running 215/75/15 BFG Mud Terrain M/T KM2's on all 4.

215/75/15 = 27.7x8.5/15

They weigh 34lbs each. Do great on the trail and on the road. They should outlast the RZR too.





Those look sweet.
 

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Discussion Starter #12
get out your calculator:

225/60R14 = 225 mm of section width, 60% of that amount in sidewall height on a 14" wheel.

225mm (divided by 25.4mm per inch) = 8.86" wide

each sidewall is 5.31" tall for a total of 10.62" plus the 14" wheel = 24.62" tall tire. It will measure slightly less on the rig and each tire manufacturer has a different size (mounted and unmounted) for a given P-Metric listing.

Take three brands of 225/60R14 and they will all measure slightly different. Interco tire is notorious for listing tire sizes high. A 37 x 13.50 may only measure 35 or 35.5" tall on a buggy for example.

Miscellaneous notes on tires and wheels:

Dominator 30” (14” wheel) in 10” width (#35) or 12” width (#40) or 30x9.5 KM2 (#42)

Interco SX in 31 x 13.50 and 33 x 15.50 heavy at #58/#71 for 15” wheel, but OK for snow?

Interco Reptiles in 27x9x14 and 27x11x14 or Swamp Lites in 28x8.50x14 and 28x11x14

Maxxis Bighorns: 26x9x14 = 24 lbs and 27x12x12 = 31 pounds, both are 6 ply tires

GBC has 8 ply Grim Reaper 27x9x14=28 lbs, 27x11x14= 33 lbs. Spartacus 26/32# in same size

STI has UTV wheels and Black Diamond tires in 27.5 x 11 x 14 (30 pounds)

Toyo Open Country 235/75R15 (29”) only weighs #29, good for Moab, 215/75R15 only weighs #25.

Other than that I know different manufactuers can vary, some of your formulas went over my head a little... or maybe it's just because I have a bad headache tonight.

On the Toyo Open Country, is that the regular Open Country (looks like a highway tread) or the Open Country MT? The MT's look like a good tire if that's all they weigh.
 

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The Tire Rack is a great source of actual tire size and weight.
Select a tire like the Bfg km2, then click on spec tab and the dimensions and weights of ALL the sizes they sell are on a chart.

If you find a size you like, enter that in their "search tires by size" section and compare.
I do it all the time...leaning towards KM2 for my S for rock crawling.
Seems like Utv tires weigh as much or more than truck tires in same size?!
 
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