58mm/88A 4-pack Black amsterdam The wheels are designed for

The wheels are designed for both rough and smooth surfaces and are made of speed-urban-ethane

For centered mounting on Rollerblade or Adapt boots: push frame backwards (bolt sits towards front of slot)

Non-heat-moldable

The cuff provides great support and flexibility

58mm/88A 4-pack Black amsterdam The wheels are designed for50 50 their third 58mm wheel; hard and fast. Featuring an exclusive profile designed for the optimal balance of speed and slide. 58mm to fit all sizes of Balance frames as well as most other low profile frames on the market. The 90A hardness provides a more durable ride focused on long lasting performance. Sold in packs of 4, but we highly recommended you ride them flat. Also works great when paired with softer wheels on the outside to reduce wheel