The Van Rysel RCR home trainer is designed for cyclists seeking top tier performance, an easy setup, and a nice quiet ride while putting in those hard training miles. It's self-powered designed reduces cable dependency, but if you want to plug in, it has ethernet connectivity so that you're not lagging behind while putting out watts on Zwift. The RCR smart trainer can handle up to 2800 W, boast 27% slope simulation, is accurate within ±1%, and is nice and quiet at 56 dB at 25km/h. What does being "Zwift Ready " meanThis means the RCR smart trainer has a "Zwift Cog" pre-installed, a 14-teeth sprocket that is compatible with SRAM, Shimano, and Campagnolo 8-13 speed drive trains. Note, it's not compatible with the Campagnolo N3W 13-speed chain. To change gear, use the "Zwift Click" "+" and "-" button fitted on your bike's handlebars. Thanks to "Zwift Click" you benefit from 24 levels of resistance. Self-powered modeThanks to its self-powered system, the RCR smart trainer works without needing to be plugged in. As soon as you start pedalling, it generates the energy needed to power all its components: motorized resistance, data transmission (Bluetooth, ANT+). This means you can train wherever you want, without having to rely on a power outlet, making it ideal for outdoor sessions, in a garage or in a room without direct access to a power supply. Enjoy a realistic downhill simulation.When plugged in, the home trainer powers a motor that powers the flywheel when you stop pedalling, giving you a realistic downhill experience. A home trainer designed for competitionWhen plugged in, enjoy instant data accuracy thanks to the Ethernet connection, that gives you ultra-responsive, latency-free training that's ideal for competition. Specifications Maximum power2800W Maximum Simulated Grade27% at 5km/h and 85 kg Weight13.6 kg Power accuracy±2.5%Wireless ConnectivityBluetooth FTMS, ANT+ Wired ConnectivityEthernet Noise levelOnly 56 dB at 25 km/h (measured at 1.5 m) Hub CompatibilityQR 130/135 mm / 12x142 & 12x148 mm thru axle Cassette Compatibility if not using Zwift CogShimano/SRAM 8–11 speeds, Shimano 12 speeds, SRAM XDR 12 speeds**SRAM 12 SPEED XDR: Requires the Van Rysel D100, D500, and RCR TrainerXDr Freehub Body Axle CompatibilityQuick Release 130-135x5mm (Quick Release provided) and Thru Axle 142-148x12mm (Adapter kit provided) Device compatibilityiOS, Android, PC (Mac & Windows) Resistance controlSelf-propelled motor Power supplyInput 100–240V / Output 48V, 1.35AExternal device chargingUSB-C port (up to 36W – USB-PD)