[Spridgets] A spridget question about rear hubs

[Bob Kitterer]

Bob,

First item is that the hubs for WW and Disk wheels are completely different.  This is one reason that the diff housing is an inch shorter.



Next using a diff from a later model car would require either changing mounting attachment points to fit the bugeye or changing the suspension on the bugeye.  The way around this is IF you can find a diff housing from an early MK I Midget with WW.  The early Midgets had the same rear suspension as the bugeye.  This is how my car is set up but then my conversion was done in 1968 and such parts were more available.

The tread was the same for all years of production.  I think that there were only four diff housing used - Disk and WW for the quarter elliptic suspension and Disk/WW for semi elliptic suspension.


Bob  Kitterer

1960 Austin Healey Sprite (Mk IV in disguise)
1966 Austin Healey Sprite Mk III (Trevor) - still in boxes
2013 Miata
2017 Mazda CX9

Pay it forward.
Thanks Frank

> On Jan 25, 2018, at 10:28 PM, Bob Spruck via Spridgets <spridgets at autox.team.net> wrote:
> 
> I should be able to measure a hub from a wire wheel car and a disc wheel car. One thing I do know is that the wheel studs are different. I believe the WW studs are shorter to accommodate the taper on the front side of the axle that meshes with the taper on the backside of the WW. I can measure them too.
> 
> I wonder what happens if you use a disc wheel hub with short studs to mount wire wheels?  Does it shorten the overall width such that there is tire/body interference?
> 
> I also assume that since Bugeyes never came from the factory with wire wheels (only disc wheels) that the diff housing is as wide as the later model's disc wheel car. That would mean that later model WW axles would be shorter and would engage the splines in the diff gears a half inch less on each side. Anybody have any experience with later model WW axles being used on a Bugeye diff assembly? My conversion plan is to use later WW axles with the disc wheel hubs but with the shorter wheel studs. Has anybody ever done this?
> 
> Bob
> 
> On 1/25/2018 11:32 PM, Trevor Jessie via Spridgets wrote:
>> Ok... but why do the HUBS have different part numbers?
>> 
>> 
>> On Thu, Jan 25, 2018, 11:26 PM Bob Kitterer <bkitterer at me.com <mailto:bkitterer at me.com>> wrote:
>> The diff housing is one inch narrower for the wire wheels. This keeps the rear tread the same as foe disk wheels.
>> 
>> Bob  Kitterer
>> 
>> 1960 Austin Healey Sprite (Mk IV in disguise)
>> 1966 Austin Healey Sprite Mk III (Trevor) - still in boxes
>> 2013 Miata
>> 
>> Pay it Forward
>> Thanks Frank
>> 
>> 
>> On Jan 25, 2018, at 7:36 PM, Trevor Jessie via Spridgets <spridgets at autox.team.net <mailto:spridgets at autox.team.net>> wrote:
>> 
>>> on the MGexperience, someone pointed out to me that there are different part numbers for rear hubs on a wire wheel car than a disc wheel car.  What is the difference?  I thought only the housings were different.
>>> 
>>> Thanks,
>>> Trevor
>> 
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