The product is of poor quality, I don't recommend it.
Unsuitable for RF. A complete disaster, on his native rubber, Kumo skated for 6 years without force majeure, and then two tires were torn in three months, one for ejection, the second for expensive repairs.
Pros
not noisy
good handling and acceleration, grip
softness
Cons
Fragile.
No cord strength, especially sidewalls
Disadvantages cross out the advantages, tk. any strike on the curb and the sidewall will tear.
No warranty for many tire centers (Vianor)