TMC is an independent, primarily volunteer organization that relies on ad revenue to cover its operating costs. Please consider whitelisting TMC on your ad blocker and becoming a Supporting Member. For more info: Support TMC

21" Arachnid Rims on Model X - Load Ratings

Discussion in 'Model X' started by SoCalLawyer, Oct 11, 2017.

Tags:
  1. SoCalLawyer

    SoCalLawyer Member

    Joined:
    Aug 24, 2016
    Messages:
    84
    Location:
    So Cal
    So I looked at my brand new Referral Rims and they now have a load rating stamp of 750kg per rim which equates to 1,653.47 lbs. Prior threads stated that Model X was too heavy for the Arachnid Rims, but looking at the new set of rims it can handle up to 6,613 lbs.

    My Model X 90D 2017 GVWR per the door jam sticker is 6660lbs. So let's just say, I remove some weight and fix the offset to 35 can I put Arachnids on my Model X?

    I also need clarification if the GVWR noted on the door includes the stock 20" Slipstream rims & tires which weigh in at 130.4lbs. The Arachnid rims weigh 105.7 lbs, 24.7 lbs, so if there is a reduction of rim weight the GVWR would be 6660lbs - 24.7 = 6635.3, so only need additional 22.3 lbs of weight reduction to make it work? Anyone know what I can remove to make it work?? lol

    Here are the specs for the Arachnids:
    • Size: 21X8.5" front, 21X9.0" rear.
    • Offset: +40 front, +40 rear
    • PCD: 5X120
    • Center Bore: 64.1mm
    Here are the specs of the 20" Slipstreams:
    • Size: 20X9.0"(front), 20x10.0"(rear) Note: Tesla later changed rear wheel to 20x9.5"+35
    • Offset: +35 (front & rear)
    • PCD: 5X120
    • Center Bore: 64.1mm
    • Lug Nut Specs: 13/16, 14X1.50 Thread
     
    • Helpful x 1
  2. Musterion

    Musterion 18h 03m 37s −24° 23′ 12″

    Joined:
    Jan 10, 2013
    Messages:
    500
    Location:
    M8
    No.

    You need to look at the GAWR FRT and RR ratings. Rear Arachnids are rated at 750kg and front (smaller) at 638kg, and these happen to exactly match Model S rear and front axle ratings (divided by 2), respectively. But the GAWRs for Model X are significantly higher and the Arachnids would be grossly underspec if you put them on the X, which is why they are only approved for the S. (And this large deficit in weight rating holds even if you happened to use 4 of the larger size wheel).
     
    • Informative x 4
    • Like x 1
  3. SoCalLawyer

    SoCalLawyer Member

    Joined:
    Aug 24, 2016
    Messages:
    84
    Location:
    So Cal
    Thanks for the info!
     
  4. zackmilo

    zackmilo Matching X+3

    Joined:
    Nov 25, 2015
    Messages:
    1,178
    Location:
    Los Angeles, CA
    Trust me. I want to do them on my X too but I can't risk the load ratings with it. I am getting the 22's instead of arachnids. You can sell them and get 22's. Sell the arachnids for $4k and buy some turbines for like $3k.
     
  5. T3xrr

    T3xrr Member

    Joined:
    Jun 24, 2017
    Messages:
    121
    Location:
    San diego
    You talking about the Oem 22's?
     
  6. zackmilo

    zackmilo Matching X+3

    Joined:
    Nov 25, 2015
    Messages:
    1,178
    Location:
    Los Angeles, CA
    Yes.
     
  7. T3xrr

    T3xrr Member

    Joined:
    Jun 24, 2017
    Messages:
    121
    Location:
    San diego
    Yeah they look great.
     
  8. leh22a

    leh22a Member

    Joined:
    May 9, 2015
    Messages:
    78
    Location:
    Texas

    Wondering if GAWR is more important when you’re trying to tow. Numbers seem to be safe if you’re simply using it as a car.
     
    • Informative x 1
    • Like x 1
  9. Peteybabes

    Peteybabes redneck drivin' a tesla...

    Joined:
    Apr 8, 2016
    Messages:
    1,091
    Location:
    'murica
    i agree with this bit...the car weighs roughly 5531lbs for the P100D, 5421lbs. for the 100D, 5381lbs. for the P90D, 5257lbs for 90D & 5185lbs. for the 75D.

    i drive 95% of the time by myself and periodically with 1 or 2 passengers and even with the occasional full load i'd barely be hitting 6600lbs. i can't tow as i don't have that package either.

    i've been wanting to do this from the day a saw the gorgeous Black Arachnids.

    GAWR, GVWR, GCWR are all ratings stating capacity, but that's just to cover a Manufacturer in case of misuse, neglect, etc...

    let me know if you can get those Arachnids on the X! :D
     
    • Like x 1
  10. HugoBoss

    HugoBoss Member

    Joined:
    Aug 4, 2017
    Messages:
    203
    Location:
    Kleinburgh
    Didn't someone at Tesla specifically say that the arachnids where not rated for the X weight?
    I thought I read that somewhere when they were first released.
     
  11. leh22a

    leh22a Member

    Joined:
    May 9, 2015
    Messages:
    78
    Location:
    Texas
    Yeah. GAWR is significantly higher in the X for towing. If you use those numbers to see if the wheel will work, then the wheels will be under rated. But I don’t think it’s a good measure to see if a wheel would work for a certain car. Each front wheel is rated at 650kg and each rear is rated at 750kg totaling over 6100lbs. So the actual wheels can definitely handle the weight. Just wouldn’t be good for towing.
     

    Attached Files:

    • Like x 2
    • Informative x 1
    • Love x 1
  12. zackmilo

    zackmilo Matching X+3

    Joined:
    Nov 25, 2015
    Messages:
    1,178
    Location:
    Los Angeles, CA
    That looks sick. Just needs wheel spacers.
     
    • Like x 2
  13. leh22a

    leh22a Member

    Joined:
    May 9, 2015
    Messages:
    78
    Location:
    Texas
    The main goal is to have something less boring then the 20” air streams but just as efficient as far as energy. Don’t like the idea of losing 10% or more in range!! Will monitor the energy usage with these wheels. If it doesn’t work, will wear the tires out and move on to something new.
     
    • Helpful x 1
  14. BrokerDon

    BrokerDon Member

    Joined:
    Aug 23, 2014
    Messages:
    672
    Location:
    Newport Coast, CA
    Silver Arachnids are selling for ~ $2,600 in SoCal now, not $4,000. I just bought a set of brand new mounted & balanced Arachnids with Michelin PSS tires, TPMS for my 2015 P85DL two weeks ago... and have had 2 SoCal sellers offer me their Arachnids for $2,600.
     
  15. Navsarin

    Navsarin S100D Red Rocket

    Joined:
    Nov 28, 2015
    Messages:
    633
    Location:
    Canada
    Can you upload some better pics? Side view as well? Thanks’ considering the same thing but with powdercoated black arachnids.
     
  16. leh22a

    leh22a Member

    Joined:
    May 9, 2015
    Messages:
    78
    Location:
    Texas
    Definitely looking into spacers.
     

    Attached Files:

  17. pkodali

    pkodali Member

    Joined:
    Oct 22, 2017
    Messages:
    468
    Location:
    Sacramento
    What exactly is the minimum load rating required for the front and rear wheels. Looking at some rotary forged wheels and they all are 1650 load rated each front and rear
     
  18. HugoBoss

    HugoBoss Member

    Joined:
    Aug 4, 2017
    Messages:
    203
    Location:
    Kleinburgh
    #18 HugoBoss, Apr 7, 2018
    Last edited: Apr 7, 2018
    @leh22a

    Wow, that looks great. Such nice rims. What size tire are you running?
     
  19. Navsarin

    Navsarin S100D Red Rocket

    Joined:
    Nov 28, 2015
    Messages:
    633
    Location:
    Canada
    Thx. I was hoping for a full angle side view of the whole car with arachnids :)

    Spacers a great idea. I’d say min 20mm
     
    • Like x 1
  20. FlatSix911

    FlatSix911 918 Hybrid

    Joined:
    Jun 15, 2015
    Messages:
    4,852
    Location:
    Silicon Valley
    Well done! :cool:
    [​IMG]
     

Share This Page

  • About Us

    Formed in 2006, Tesla Motors Club (TMC) was the first independent online Tesla community. Today it remains the largest and most dynamic community of Tesla enthusiasts. Learn more.
  • Do you value your experience at TMC? Consider becoming a Supporting Member of Tesla Motors Club. As a thank you for your contribution, you'll get nearly no ads in the Community and Groups sections. Additional perks are available depending on the level of contribution. Please visit the Account Upgrades page for more details.


    SUPPORT TMC