Wheel Selection Guide Hardness 87A-Very rough ground (rapid drop on hillside, etc.)
95A-Rough ground (blocks)
99A-Smooth ground (various markets, skateparks, U pools, swimming pools)
101A-Not suitable for rough or very smooth ground (because it is too hard so the grip is very poor) Size 52-55 mm-suitable for most users. Street market, skatepark. Little skater.
56-60 mm-suitable for most users. Street market, skatepark. Adult skater.
60+mm-special skates. Lengthen the board surface, drop down the slope rapidly, and mud floor.
Beginners are better to choose wheels with lower hardness, because they can’t ride their skateboards well to avoid pebbles, glass, debris on the road, etc. If the hardness is too high, these debris will jam their wheels. , And experienced skaters usually choose harder wheels.