On Tue, Mar 26, 2002 at 12:23:52PM -0800, Jim Franklin wrote:
>
> I hope this isn't too far from the list charter...there seems to be
> a widely varied collective of experience here though.
>
> I bought a '90 E250 van for racing (motorcycles, not racing the van!).
> The front brake rotors were shot so I bought new ones. On the new ones,
> there is a 1/6" high protrusion in the center, about an inch smaller than the
> diameter of the lug nut circle, that the rim is supposed to
> slip over and rest on. Problem is, the I.D. of the rim is about 1/16"
> smaller than the O.D. of this pilot protrusion. On the old rotors
> there was about 1/8" gap so the rim didn't even use this as a load
> bearing surface, it seemed to add a trivial amount of support for
> the hub and outer wheel bearing, or maybe it's just the changeover
> from machined surface, where the rim sits flush, to unmachined cast
> surface.
You somehow got disks are are intended for wheels that align
on their center hole.
When I had my '72 Ford van I had a hard time getting correct parts
for it-- Ford seems to change things a lot in their vans.
Can you find a clued-in parts person or mechanic at the local dealer
who can look at the parts and tell you what's up?
Eric
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