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The Midget rear differential has a 4:10 gear, so it will have higher revs
than the XFI trans. It has 145R13 tires, pretty small, but I think the Metro has even smaller 12" tires? There is room for taller tires in back, but then they would add weight!
I actually spent a lot of time looking at tires and wheels to make them as light as possible. The bolt pattern on the Midget is not common, so
the only option is aftermarket wheels designed for the Midget which are expensive, the UltraLights. Otherwise I'd have to adapt other wheels.
It looks to me the stock steel 13" wheels are skinny and don't really weigh that much, the aluminum ones are 14 or 15, and weigh more, so I'm just keeping the stock wheels. I'm thinking moon disks on the wheels, so the appearance isn't a factor.
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