The Hyper beach cruiser for $140.00 from Walmart is what I am using with my Phantom 85 and it has been holding up for a few years and a few thousand miles now.Sadly I googled the model name and I think it is aluminum. It's called a Specialized SportRock Mountain 2000. I've only found a few but the description says it's aluminum. So what I might do is buy the zeda80 firestorm this week. And buy a cruiser from Walmart next week for 150$ there's 2 to choose from a Kent or a Hyper. So I won't buy the other one for 75$ since it's aluminum with those holes. I'm gonna order the motor first so it can be shipping because the bike next week says next day shipping. Also have to buy whatever tools I'll need.
It is better built with thicker tubing and has better welding than either the Kent or the Huffy beach cruisers.
There are a few of us here in the forums that favour the Hyper over all others for building a decent motorised bike.
You will see that in my tutorial of building these beasties that I already posted for you.