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Weight for Cooper Maxx and STs?

Discussion in 'Wheels & Tires' started by stump jumper, Aug 14, 2015.

  1. Aug 14, 2015 at 10:59 AM
    #1
    stump jumper

    stump jumper [OP] Well-Known Member

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    Tire rack does not list them and the Cooper website does not have weight. I emailed Cooper because I am looking at the 265/75/16 in load range E because that is all they have. My current tires weigh in at 49 lbs so I can handle the 51 that a lot of the AT and MTs in this size weigh. Does anyone know the weight for these?
     
  2. Aug 14, 2015 at 12:59 PM
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    Primo 95

    Primo 95 Well-Known Member

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    265/75/16 S/T Maxx 16X8.5 Level 8 Trackers 5100 1.75 HID, LED interior, 3" N-Fab step bars
    I have been looking into these and this very topic lately. And specifically on 265/75/16 St Maxx. There is no definite answer out there.
    I also did some research of this the myth of tire weights and fuel economy. On several engineering forums, many professional engineers concurred that just a few pounds of additional tire/wheel weight would NOT impact "Rolling Resistance" (the engineering term). Other factors such as aerodynamics of the sidewall, the tread lugs, tire pressure, rigidity, and how much the tire extents past the wheel well have the biggest impacts on Rolling Resistance & fuel economy. Obviously if they were 20lbs more each, they may be an impact, but not a 10% increase in weight.

    I am not thrilled about going from my C load range Duratracs, to load range E. But The noise is getting out of hand. and the new BFG KO2 only come in load range E too.


    49lbs
    http://www.treaddepot.com/tire/90000003094.html

    54lbs according to this guy referencing Discount Tire Now. But if you continue reading, a poster says his 285 weighed 7lbs more than what was reported.
    http://www.jeepforum.com/forum/f15/cooper-discoverer-st-maxx-jeep-lj-rubicon-1364065/#post13513103

    54lbs
    http://www.amazon.com/Cooper-Discov...1876&sr=8-1&keywords=cooper+st+maxx+265+75+16
     
  3. Aug 14, 2015 at 3:36 PM
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    lyodbraun

    lyodbraun Well-Known Member

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    Nothing yet
    Ok so I got some weights of different tires, no ST Maxx though, we don't make those at our plant... But this will give an idea of some tire weights all tires are load range E

    Cooper ST 265/75/16- 48lbs,

    Mastercraft courser MXT 295/70/17- 58lbs,
    MXT 305/65/17-59lbs

    Cooper AT/3- 265/70/17- 50lbs
     
  4. Aug 14, 2015 at 3:39 PM
    #4
    tommyhd03

    tommyhd03 Well-Known Member

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    885 coils, blistein 5100 front and rear, 1 1/2 AAL. SCSI sr8 wheels, 285/70/17 cooper discover at3 tires.
    I just recently got cooper discover at3 in a 6 ply 285/70/17 and they weigh 45lbs a piece. That sealed the deal for me!
     
  5. Aug 14, 2015 at 7:21 PM
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    stump jumper

    stump jumper [OP] Well-Known Member

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    I noticed that most Es are around 51 but some of the Cepeks are listed at 57. I think width, rolling resistance, compound and tread design will impact MPGs more than weight. That said I think the Coopers will be comparable to the Duratracs and the D load BFGs I have now. I ran some MTRs once in Es and MPGs were same as Duratracs replaced with.
     
  6. Aug 15, 2015 at 6:07 AM
    #6
    tommyhd03

    tommyhd03 Well-Known Member

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    885 coils, blistein 5100 front and rear, 1 1/2 AAL. SCSI sr8 wheels, 285/70/17 cooper discover at3 tires.
    With the cooper 285s
     
    Adams22 likes this.
  7. Aug 16, 2015 at 1:20 AM
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    sawbladeduller

    sawbladeduller semi-realist

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    ...just mounted cooper ST 255/85/16 load range D, not thinking about the weight.IMG_2585.jpg
     
  8. Aug 25, 2015 at 10:44 AM
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    stump jumper

    stump jumper [OP] Well-Known Member

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    I found a website that had weights for the Coopers. ST in 265/75/16 load range E is 49 lbs. The STTs are much heavier at 55.
     
  9. Aug 25, 2015 at 10:56 AM
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    Sterdog

    Sterdog Well-Known Member

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    Not that it matter but if anyone is curious the heavier STT Maxx is heavier because it's a commercial grade tire. The tire is overbuilt rather than just good enough for it's weight rating which results in a longer lasting tire that's also more puncture resistant. That's why the STT Maxx is becoming more and more popular. I'd stick it right up there with the Wrangler MTR for puncture and tear resistance but it's much more mild mannered for a weekend warrior than that mud tire. We had terrible luck with Cooper before the STT Maxx came out. Now I question using anything else for commercial duty and even on my light duty Tacoma.

    Your PSI, tire size, and lift will effect your mpg more than the weight.
     
    trailbound likes this.

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