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Lt285/75/R17 vs Lt285/70/r17
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OverlandBandits
Dusty Truck
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Joined: Jun 27, 2018
Posts: 53
Location: Phoenix AZ

PostPosted: Sun May 05, 2019 7:33 pm    Post subject: Lt285/75/R17 vs Lt285/70/r17 Reply with quote

Couple questions? So I’m getting some Ko2s I’m currently running coppers MT Lt285/70/17 but since I’m buy new tire thinking of going lt285/75/17 i feel that I can get away with that size tire without re-gearing
Q?
Would Lt285/75/r17 be ok without re-gearing or just stay with lt285/70/r17

Should I do C Rated or E rated ?
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Fjforles
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PostPosted: Sun May 05, 2019 10:26 pm    Post subject: Re: Lt285/75/R17 vs Lt285/70/r17 Reply with quote

Im running 315/75/r 15 ko2 i belive e rated and i didnt gear. You should be fine but you. I had 285 before. With the 315 you will feel a lag
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OverlandBandits
Dusty Truck
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PostPosted: Sun May 05, 2019 11:07 pm    Post subject: Re: Lt285/75/R17 vs Lt285/70/r17 Reply with quote

Thanks for the info I don’t know about 315s sound to big for me..lol
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Fjforles
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PostPosted: Sun May 05, 2019 11:15 pm    Post subject: Re: Lt285/75/R17 vs Lt285/70/r17 Reply with quote

Easy to go over curbs at the mall lol
I think 295 would be a nice size a tad bigger the 285 and to to heavy as the 315. Either way they are ko2 , cant go wrong with that.
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OverlandBandits
Dusty Truck
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PostPosted: Sun May 05, 2019 11:31 pm    Post subject: Re: Lt285/75/R17 vs Lt285/70/r17 Reply with quote

That’s where I’m at just trying to find what’s better some say e rates is overkill some say c rated is not strong enough just so many opinions it’s hard to decide ..😓
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calichaos
Obstacle Crusher
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PostPosted: Mon May 06, 2019 7:15 am    Post subject: Re: Lt285/75/R17 vs Lt285/70/r17 Reply with quote

Ive always ran E rated no matter the size.. I figure there is a very nominal price difference and having a bit stiffer sidewall for me has worked well.

One note with the E rated tire.. I find I need to go lower a bit at air down than others to get the cushier ride and flexie for better grip no matter the manufacture or tread pattern.

a person here once said the best tire is: "round, and holds air". Cant go wrong with that logic!
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Jimbolio
Master Wheeler
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Joined: Oct 19, 2008
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Location: Tucson

PostPosted: Mon May 06, 2019 7:56 am    Post subject: Re: Lt285/75/R17 vs Lt285/70/r17 Reply with quote

E tires have 12 ply in the tread (12 steel belts) the C only 10. The main difference we are looking for in offroad tires is the strength of the sidewall. I'm thinking either they are the same, or the E tires slightly better. The E tires will ride harder. On my 285 Hankook MT's the sidewalls gave out on 3 of the 4. (Thank you certs)and they were E's.

I have 305/75/R16 on my FJ. No regearing. they are not taller, but they are wider & heavier than 285s. (No racecar either tho) but that's not what I bought my FJ for.

They are BFG KO2s, I'm very happy with them on/off road.
They were spendy though.

IMHO 285's are the sweet spot for FJ cruisers.

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B1ackSh33p
Expeditioneer
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Joined: Feb 22, 2014
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Location: Far East Valley

PostPosted: Mon May 06, 2019 8:19 am    Post subject: Re: Lt285/75/R17 vs Lt285/70/r17 Reply with quote

I'll second the stick to E rated opinion. They usually provide tougher side walls with E rated tires than C. If you stay on black top more, then C rated will get you better mpg's more than likely.
There are way too many variables when it comes to tires and tire manufacturers. You can have 285/70r17's that are taller and heavier than a tire of the same size from a different manufacturer. You have to really get down in the weeds to start to find the differences between the tires per manufacturer.
I've compiled lists of several tires in my time while exploring which tire could be better per price and what the weight differences are per tire according to size and manufacturer.
This is a subject that really has no right or wrong answer, per se. It's all in what is the desired application of the tire consumer.
I, myself use a Maxxis 295/70r17 that weighs in at 63 lbs and is approximately 34" in height. I chose this tire due to its E rated side wall and aggressive tread pattern. I air down to 12 psi when I'm going to get into crawling situations where grip is the key essential ingredient to getting over obstacles.
Again, this is a wide subject that could have too many variables in what the end user wants or needs in their own respective situation.

Whew! Let me know if you'd like a sample of the compiled list of tires and I will email it to you if so desired. Though dated, it is a pretty complete list nonetheless, for tires in the 33" range for the FJ cruiser with 17" wheels. I've tried uploading it here with zero luck.

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mod_muscle
Expeditioneer
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PostPosted: Mon May 06, 2019 11:31 am    Post subject: Re: Lt285/75/R17 vs Lt285/70/r17 Reply with quote

I don’t really have much to offer that hasn’t been stated already. All good info.
I did just put new tires on my FJ and am very happy with the results. The cost was crazy expensive though so not sure it was worth it. But maybe.
I had the Hankook MT in 285/70/17 and they rode nice and always did what I wanted them to do. They were D load. I just installed KO2 in 34x10.5x17 D load and I love them. The noise is almost nonexistent. And the size looks good IMHO. My FJ is re-geared so this size killed off some of that gearing. I’m averaging 17.5mpg now compared to 14.5 with the MTs. I drive like an old man though.
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Fjforles
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Joined: Apr 29, 2019
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PostPosted: Mon May 06, 2019 12:04 pm    Post subject: Re: Lt285/75/R17 vs Lt285/70/r17 Reply with quote

12 mpg on a good day here lol sometimes i drive like MadMax lol
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OverlandBandits
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PostPosted: Mon May 06, 2019 4:58 pm    Post subject: Re: Lt285/75/R17 vs Lt285/70/r17 Reply with quote

Thanks guys for the input really appreciate it I think ima go with the ko2 on a Lt285/75/R17
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4GaugeSurprise
Obstacle Crusher
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Joined: Jul 16, 2013
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PostPosted: Wed May 08, 2019 9:54 am    Post subject: Re: Lt285/75/R17 vs Lt285/70/r17 Reply with quote

I didn't notice any mention of the body mount chop. If you don't already have that done, may want to before going with the 285/75/17 .
I know that the 285/70/17 on the KO2 usually works on stock rims with very little to no rub, but that little bit extra on the 75 may be enough to rub that spot.
I've been running the 285/70/17 KO2 - E load rated - for a few years now, happy enough with them that I'm likely to go with them a third time. Really wish I could go with a softer sidewall, but I have a history of stupidity best served by the stiffer tires.

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GillT
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PostPosted: Thu May 09, 2019 9:51 am    Post subject: Re: Lt285/75/R17 vs Lt285/70/r17 Reply with quote

I am a little late to the conversation, but I use 'C' load on my FJ for a slightly softer ride. The extra belts in an 'E' are to deal with the load of heavier vehicles. I am not sure if the sidewalls have more protection or not, but unless you are doing rock crawling all the time, I do not see the need for the 'E' load. I think you see the 'E' load so much because all of the 3/4 ton + trucks going for the same size tire as we use here. It is probably cheaper to manufacture one tire for all applications. My 2 cents is to go for a 'C' rated tire though they are hard to find past 33 inches.

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Dominic.08FJ
Dusty Truck
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Joined: Jun 17, 2018
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PostPosted: Thu May 09, 2019 2:11 pm    Post subject: Re: Lt285/75/R17 vs Lt285/70/r17 Reply with quote

I have 285/75r16 e rated nitto ridge grappler and love them. No re gear. I would buy the same tire and size over again if I had to. I have the certs so I'll be ok for awhile Haha.
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fjlarry
Obstacle Crusher
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Joined: Jan 08, 2008
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PostPosted: Fri May 10, 2019 1:41 pm    Post subject: Re: Lt285/75/R17 vs Lt285/70/r17 Reply with quote

All Terrain
T/A KO2 - Tire Size,


285/70/17 Load C is 50.33 lbs

285/70/17 Load E is 57.87 lbs

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