The brand new entry-level trainer from JetBlack, the JetBlack S3 Sport Indoor Trainer is an affordable way to convert your bike to an indoor trainer! Featuring a single resistance level that is perfectly optimised for riding indoors and increasing your fitness. Simply replace the rear skewer or thru-axle on your bike with the one provided, clip your bike into the trainer and you're ready to go. The JetBlack S3 Sport Indoor Trainer comes pre-assembled and ready to go right out of the box, and the wide base and anti-slip feet offer incredible stability while riding. And when you're done, the S3 folds up into a compact shape for easy storage! If you're after an affordable trainer to help increase your fitness, then the S3 Sport Indoor Trainer is made for you!