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Thread: Proper steering wheel hub

  1. #1
    Join Date
    May 2019
    Location
    Lafayette, Louisiana
    Posts
    2

    Default Proper steering wheel hub

    What other car has a 5/8” , 36 splined shaft like my original lotus 7. I’m trying to buy a hub to mount a steering wheel but no one lists a hub for a 7. What other car uses a 5/8” shaft with 36 splines so I can use the cross reference to buy a hub. Thanks for any help, Bill

  2. #2
    Join Date
    Aug 2009
    Location
    Escondido, CA
    Posts
    269

    Default

    Hi Bill;

    I have a couple of suggestions for you:
    1) Contact Chris Mintoft at Redline Components in the U.K. He likely has exactly what you need.
    2) Consider changing out your 1-piece original steering column (or skewer in the case of a front end collision) for the 2-piece collapsable type used on the S3 and later Caterhams. The 2-piece column is available with the stock spline on the upper section (just like the one that you already have) or with a steering wheel quick-release hub as an integral component. I have recently done this upgrade (including the quick-release) and find that the expense is outweighed by the additional peace of mind vis-a-vis a bit of safety. The built in quick-release further reduced the cost delta of the 2-piece column. These are available from Redline or possibly Rocky Mountain on this side of the pond.
    3) Check with Jay or Joe at JAE Parts in Goleta, CA. They're Lotus specialists. They may have an adapter in stock. (805) 967-5767
    4) Check with Moss Motors. They may also have an adapter in stock.
    5) A quick interweb search for steering wheel hub adapters shows that the Moto Lita hub adapter B20H F has the correct spline interface. You can buy direct from them in the U.K. or from a Stateside source like Mrsteeringwheel.com. Note: I have a MotoLita wheel on my '62 and I love it.

    Here is Redline's contact info:
    sales@redlinecomponents.co.uk

    The website:
    http://www.redlinecomponents.co.uk

    And the Faceplant page:
    https://www.facebook.com/RedlineComponents/

    Chris is very responsive and his prices are quite reasonable. He has a considerable inventory on hand, especially for the S2

    Good luck.
    Ron

    '14 Evora IPS
    '84 Turbo Esprit
    '77 S1 (deceased)
    '62 Lotus Seven S2 109E Cosworth

  3. #3
    Join Date
    May 2019
    Location
    Lafayette, Louisiana
    Posts
    2

    Default

    Hi Ron, thanks for the information. I had already called several of the sources you mentioned. I finally called Mike LEMPERT, the maker of my steering wheel. He told me that the 7 series 2 has the same diameter and splines as a AH Sprite series one and two. I ordered a hub for the Sprite and it fits perfectly on the 7’s steering shaft. That problem is solved. My next problem is the big nut that holds the wheel on. I’ve tried a 14mm coarse thread, fine thread, and very fine thread. The threaded area is 14mm in diameter on my gauge, but is there another thread type I should try? Thanks, Bill

  4. #4
    Join Date
    Dec 2014
    Location
    Los Angeles
    Posts
    200

    Default

    Get a thread gauge and measure what you have. Try [boltdepot.com] as they offer a wider range of metric sizes and quality. I've used them in the past for unique fitments.

  5. #5
    Join Date
    Jan 2006
    Location
    Seattle-ish
    Posts
    1,123

    Default

    Are you sure it's metric and not standard? 9/16" is pretty close to 14mm. Definitely pick up a thread gauge as that will give you the definitive answer.

    -John
    Westfield SEiW
    2.0L Duratec
    Throttle Steer

  6. #6
    Join Date
    Sep 2014
    Posts
    24

    Default

    Quote Originally Posted by Stevensonjr View Post
    ...My next problem is the big nut that holds the wheel on. I’ve tried a 14mm coarse thread, fine thread, and very fine thread. The threaded area is 14mm in diameter on my gauge, but is there another thread type I should try? ...
    The nuts are available from Moss (link). I believe in your case it would be part #5 in their illustration.
    Westfield 7, Series 1

  7. #7
    Join Date
    Nov 2006
    Location
    Higganum, CT
    Posts
    1,618

    Default

    I think the thread size is 9/16 X 27 TPI or something close to that, so you'll probably have to get it from Moss or another vendor.
    Bruce

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