Check the listing for details. Posera Wheels - speedlimiter for surfskates - automatic skateboard brake. Condition: New. Listed at 100.00 USD. Add-on for Slide Surfskate by Sancheski 70mm wheelAutomatic speed limiter.Higher speed more braking.Lower speed less braking.Configurable response.No friction no jerking.On usual streets, during a descent where others start to continuously slowing down doing slides or foot brakes you can still enjoy cruising at comfortable* speed.It greatly expands your surfskating terrain. Enjoy the downhills you wouldn't dare before.It does not slow you down when pushing or going slow and moreover it can be completely switched off/on in 5 secs.Tested for more than two years in rough conditions of Swiss Alps mountains passes.*Comfortable speed is a speed when you still can jump off from the skateboard and your board will not get back under your feet. This brake system does both things for you.Mounting instructions: https://www.youtube.com/watch?v=mCGilxn1oFAPosera Wheels channel: https://www.youtube.com/channel/UCOywmHHHl7QzTJ20KXGPZn