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Title: wheel hub thread pitch ? Post by: TreviDash on July 27, 2009, 05:26:40 PM Does anyone know, or able to measure the road wheel bolt thread pitch?
Thnaks. Title: Re: wheel hub thread pitch ? Post by: rachaeljf on July 27, 2009, 11:10:07 PM M12 x 1.25
Hey, my first proper post/answer! Cheers R Title: Re: wheel hub thread pitch ? Post by: TreviDash on July 28, 2009, 02:47:28 PM Cheers, and Welcome!
So it's a 12mm diameter bolt with a 1.25mm thread pitch. I've had a measure since (I don't have thread pitch measurer, and swore they were different to my Alfa 155 as they din't fit Beta hub...) so the rest of the detail is: 17mm hex head. The longer 'alloy wheel' bolts are length 56mm, having a 35mm shank and a 22mm thread. * goes for a lie down * :D Title: Re: wheel hub thread pitch ? Post by: MattNoVAT on July 28, 2009, 08:38:41 PM Just to add a little more info to this thread, you do have to be a bit careful if you are using the Beta wheel spacers with original Cromadora wheels, I was not happy with how far the wheel bolts screwed into the hub if they were being fitted. Bolt manufacturers stated at least 8 full rotations to be properly secure and I found that the bolts on my car with spacers they were doing four/five at best. As they are quite an important part to keep on the car I opted for longer wheel bolts, but did have to turn them down 5mm because I could not buy the right length from the start and the next size up (45mm I think) went in too far and locked up the whole hub.
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