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MG MGB Technical - Tire Alignment

I have a problem with tire shimmy and tire wear on my 77MGB. I have rebuilt the front end not replacing rubber fittings but did not replace the king pins. I had new tires mounted and balanced ( how well is yet to be determined). With a bit more then 1000 miles the tires are badly worn on the inside. I am going to replace the worn tires and have all balanced at a shop that can properly deal with wire wheel balancing. A Harley Davidson dealer may be a solution. However, when all tires are on, standing in front and viewing the tire profile I sense that the front tires look as if they are slanted inward with the tops being farther out then the bottoms. I have not yet placed a carpenter's square on the floor next to the tires to verify this but if the lean is there any suggestions as to cause and remedy.
J Fleshman

I recently re-built the front suspension with all new parts. It became apparant that the toe-in was wrong when I was finished. Tops of the tyres being more out than the bottom sounds as if there not sitting square on the hubs or the spokes are very 'out of syc' on the rims(wire wheels having a central mounting as you know). Just a thought...
/Moss
Moss

J,
If you didn't replace the rubber bushings or the kingpins, what did you rebuild? Looking at the front of the car, the lower "A" frames should be parallel to the ground.
Joe G
J. E. Guthrie

Heavily worn on the inside after just 1000 miles sounds more like tracking (not enough toe-in) than balance, which 'only' causes steering wheel wobble at 65 plus. However did you get the upper trunnions the right way round? These should be such that the top of king-pin is inside the upper fulcrum pin, not outside. The king-pin should be leaning inwards at the top, which should put the wheel more or less vertical. The wrong way round will put the tops of the tyres further out than the bottoms, But I'd expect that to cause excessive wear on the outside, not the inside.
PaulH Solihull

This thread was discussed between 23/07/2011 and 29/07/2011

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