I had ordered these easy wheels a few weeks ago on an impulse buy. They were not needed as I was already satisfied with what I was using. Anyway, decided to put them on and give them a go. They are pretty nice, roll very well, and didn’t experience any heel striking. They were from AliExpress called Silent Strong Wheels size 75mm came in a 4 pack for USD$70 and come in many colors. 
by randywhorton
5 Comments
You overpaid, they’re now selling them for $30 for 4pcs on AliExpress, that was your price before. In my opinion, they look clumsy. I’m interested in the Eazy Wheels ones with colored glass, but they’re still expensive.
$70usd for 4 rollerblade wheels?! Yikes!
You’d definitely be able to identify your Brompton in a line up just be careful it doesn’t roll away from you
At least in the USA, 4 roller blade wheels is considerably less. They’re great for rolling while folded. But heel strike with the wider wheels was an issue for me.
https://a.co/d/05G6FkcN
FWIW, I understood the Brompton made EZ wheels were designed to fail/break-away as a sacrificial part to protect those frame stalks from damage in case of unfortunate drop.