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21" Arachnid Rims on Model X - Load Ratings

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

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  1. SoCalLawyer

    SoCalLawyer Member

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    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″

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    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).
     
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  3. SoCalLawyer

    SoCalLawyer Member

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    Thanks for the info!
     
  4. zackmilo

    zackmilo Chrome Delete Champion

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    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

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    You talking about the Oem 22's?
     
  6. zackmilo

    zackmilo Chrome Delete Champion

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    Yes.
     
  7. T3xrr

    T3xrr Member

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    Yeah they look great.
     

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