Even thought you picked up some alum wheels, that problem might not be all "out of the way."
A friend of mine runs a sidecar at ELMO. He put a new alum wheel on his side car over the Winter. SCTA has a new rule that any alum wheels must also have an engineers statement, saying the wheel design and workmanship meets or exceeds the speed and weight of the vehicle is it being used on. My friend told me that the engineer had to do a study and present the data for SCTA approval in Tech.
You may want to check with someone more familiar with this new SCTA alum wheel "engineering study" before you go too far.
Bill