[Miata] [NMC] Installation of rims

[James Thorusen]

For Chris and the list:

Greetings!

   If I recall correctly, the lug nuts have a chamfered edge which matches a 
taper in the mounting holes in the wheel.   This feature causes the lug nuts 
to center in the holes, and transmits the force applied to the hub in shear 
through the lug bolts.   I don't believe that friction has anything to do 
with it.   Just my $.02 worth; your mileage may vary.

Regards,
Jim T.
entropycat at verizon.net
'74   914
'90   Miata  (x3)

----- Original Message ----- 
From: "the.jack" <the.jack at verizon.net>
To: "'Miata List'" <miata at realbig.com>
Sent: Thursday, August 30, 2007 11:02 AM
Subject: [Miata] [NMC] Installation of rims


> Well it's not truly NMC as it could apply, it's just
> a generic question: is the relationship between the wheel,
> rotor/drum and hub meant to be frictional under rotation,
> meaning that the studs are only used to keep tension. So,
> were you to grease each facing during installation you'd be
> relying entirely on the shear strength of the studs, which
> is NOT their purpose.
> I ask because I often have to fight to get rims off,
> especially least when the rims are steelies (the Miata rims
> aren't so usually bad). I had one HELL of a time yesterday,
> it actually became dangerous, so I stopped :(
>
> Thanks,
> the.jack / Chris C.
> 99 Mazda Miata 5-sp Emerald