<VV> Concentric wheel spacer necessary?

[Joel McGregor]

I read up on the wheels falling off and it's a problem with too many surfaces being clamped together.  Note that the front single wheels don't fall off.
You've got the hub surface then the brake drum and then 2 wheels that all have to be clamped together.  Any rust, dirt, paint or whatever on that many surfaces is too compressible to overcome with the maximum clamping force of the studs.  They are fine if you re torque after the recommended 150 miles.  The previous lug piloted system used a nut for each wheel instead of one for the pair so they had one less pair of mating surfaces to clamp but twice as many nuts to torque.  My truck has the old system and torqueing 20 on each dual is a real beating.  That system also uses 4 different lug nuts.  As Hugo mentioned they are LH thread on the left side and RH on the right.  The front and rear outers are 1-1/8"  The rear inners are much smaller  IIRC 3/4.  The nuts for the inner are the studs for the outer hence the size difference.
Joel McGregor


-----Original Message-----
From: Hugo Miller [mailto:Hugo at aruncoaches.co.uk] 
Sent: Tuesday, November 28, 2017 2:34 AM
To: Joel McGregor <joel at joelsplace.com>; Virtualvairs at corvair.org
Subject: Re: <VV> Concentric wheel spacer necessary?

#### I've owned & operated large buses & coaches in the UK all my life. The old British coaches, as with all cars of that era, had conical lug nuts & countersunk holes in the wheels. The wheels were located solely by the studs & nuts. They also had left-hand threads on the left side of the vehicle. 
Then they changed to the European system of having a register on the hub to locate the wheel, and flat lug nuts. Right-hand threads all round. Now we have a thing called "Wheel-loss syndrome" where the twin wheels on the left rear keep falling off. That's progress, I guess, - if it ain't broke, fix it till it is.

-----Original Message-----
From: Joel McGregor via VirtualVairs
Sent: Tuesday, November 28, 2017 5:43 AM
To: 'Virtualvairs at corvair.org'
Subject: Re:  Concentric wheel spacer necessary?

Big trucks use either hub centered or stud centered on disk wheels but not both.  They carry a lot of weight so I'm guessing that using normal Corvair studs and tapered seats is more than good enough.
When I bought my '64 Spyder I ran it pretty had before really looking it over and it had a nut missing on a rear wheel.  3 held it together fine so I'm thinking 4 is plenty.

Joel McGregor