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  1. #1
    New Member
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    Anyone know tire valve stem size? Instaling TPMS on Transcend with 225/75R15

    Picking up our 2021 Transcend 265BH later April and trying to figure out in tire TPMS that can sync up with 2020 GMC Sierra HD 433Mhz built in TPMS monitor (sensor behind plate, and in dash display). Stock steel wheel, 6 bolt pattern and Westlake ST225/75R15s load range E at 80psi recommended.

    I'm suspecting that stem sizes are the larger 0.625 vs the 0.453 diameter but can't seem to confirm definitively anywhere. I can easily find 0.453 diameter TPMS but any 0.625 look to be a custom job and $$.

    If anyone knows or even a guess please let me know. Cheers all.
    Last edited by PrairieOcean; 03-18-2021 at 09:06 PM. Reason: Subject change

  2. #2
    Site Sponsor
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    I can't remember the last time I saw a .625 valve stem. And I used to work in a tire shop.
    2019 F-250 Supercab
    2017 Imagine 2650RK

  3. #3
    Site Team Second Chance's Avatar
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    Give Grand Design Customer Service a call and have your VIN handy: (574) 825-9679.

    Rob
    U.S. Army Retired
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    2020 Solitude 310GK-R, MORryde IS, disc brakes,
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    (Previously in a Reflection 337RLS)
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  4. #4
    New Member
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    Thanks to both - I appreciate the replies. I'll pick up the phone and give GD a call.
    Last edited by PrairieOcean; 03-19-2021 at 04:54 PM.

  5. #5
    Rolling Along
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    I have a 2021 Transcend 261BH and it has .453 stems.
    Current: 2021 Transcend 261BH, 2019 Ford F250 SRW SWB CC 6.2 - Picture
    Previous: 2016 Jayco X213, 2014 F150 EB 3.5

  6. #6
    New Member
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    Quote Originally Posted by rootusrootus View Post
    I have a 2021 Transcend 261BH and it has .453 stems.
    Cheers! Super appreciated

  7. #7
    Fireside Member
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    Nichols manufacturing 602-723-5456 makes the correct valve stem for the GM system.


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    Carl and Diane - Arkansas
    2017 Grand Design Solitude 369RL
    2020 CHEVY 2500 HIGH COUNTRY DURAMAX
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