JetBlack S1 Sport Magnetic Trainer with Lite App Envelope Shipping Simply cut the spout to

Simply cut the spout to your preferred diameter and use it to fill the tyre directly

Easy upgrade for any Topeak floor pump

It comes with a strap for mounting on the bike or you can pop it in a backpack

Race sealant is made for race-day use and needs to be inspected more often than standard sealant

JetBlack S1 Sport Magnetic Trainer with Lite App Envelope Shipping Simply cut the spout toThe JetBlack S1 Sport Trainer is a magnetic resistance bicycle trainer that is perfectly tuned for fitness riding The S1 is an economy package that has a fixed resistance mode When used with the full range of JetBlack sensors You'll be able to fine tune your entire training experience You can even upload your session to Training Peaks and Strava All JetBlack trainers come with a lifetime warranty. Out of the box, it only works with QR end caps.