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Bought these as replacement wheels (as it was mentioned by the vendor)for the Wavboard purchased from them which broke in 1 month - the wheels were just for inline skates and I am yet to get the replacement for the bearings and wheels broken on the waveboard. It's trash lying in my house - anyway I got my kid a Decathlon waveboard which is amazingly smooth and durable plus you get spares. always pay for quality and you will get it. Don't deal with cheap vendors like Jaspo.
I have used for Slalom skating for 10 minutes but wheel grip on floor is very sticky skater can't perform any type of excercise or tricks or rolling properly. They have to do more efort for skating rather than other product.