My fathers company is our team's machining sponsor and they made aluminum wheels and they are looking to see if anyone is interested. The attached photo is a 4 inch hex bore spoke and solid wheel that are 1 inch wide. The spoke wheel weighs approximately .25 pounds. The 4 inch wheels will be sold for $27. They are looking into making 6 inch wheels but are unsure about pricing for those. If there is enough interest, they will put them up on their website for sale.
https://drive.google.com/file/d/0B3f...ew?usp=sharing
https://drive.google.com/file/d/0B3f...ew?usp=sharing