I was after new rear wheels for a Micro Maxi scooter after noticing that my son couldn't brake properly anymore. After first trying a new brake, I came to realise one of the 2 rear wheels had significant wear. I checked with a few scooter dealers in Sydney first, none of them had 80mm replacement wheels in stock. Then I checked with Micro, they charge $25 + $10 delivery for one wheel (!) - the Maxi needs 2 rear wheels and $60 felt like a rip off. I ended up ordering some cheap wheels via eBay from China but they never arrived and then I found these Globber ones. Globber is a quality scooter maker from the UK and the wheels are the same size as the Micro ones.
I was surprised they didn't charge for shipping but I just received mine and they're perfect for the Micro Maxi so they would fit the Micro Mini as well.
I wheely recommend you don't try to break your son..