The Tacx Flux 2 Smart Trainer is a powerful, accurate turbo trainer compatible with a wide range of bikes. The Flux 2 is an interactive smart direct drive trainer with an electric brake. With an accuracy of 2.5% & maximum sprint resistance of 2000 Watts, the Flux 2 is perfectly suitable for top athletes who need to analyse their performance. The Flux 2 has a larger resistance unit compared to its predecessor which accomodates a larger simulation range, with a maximum gradient of 16%. Combine the stronger resistance with the large 7.6kg flywheel & you get an enhanced ride feel & responsiveness. Vibrations & noise are near non-existent with the Flux 2, the most silent flywheel equipped trainer on the market today. Bluetooth & ANT+ connectivity lets you connect to popular riding apps such as Zwift & Tacx, or you can do standalone training if youd rather. Durable materials & a large footprint ensures maximum stability when riding. Axle Compatibility: Race 130mm MTB 135mm 142mm 148mm Adapter for 135x 10mm available Cassette Compatibility: Shimano & SRAM 8 t/m 11 speed Campagnolo body sold seperately Supplied with: Quick release for road bikes & mountain bikes (5mm) Direct drive quick release with adapter set 142x 12mm 1 month Tacx Premium software