5 adjustable resistance levels for finding the perfect setting for your goalsMagnetic resistance unit provides quiet and frictionless rideResistance unit clutch knob to ensure optimum tire/roller engagement Linear resistance boosts workout intensity to match each pedal stroke and gear clickSpring loaded skewer clamp for easy bike installationLeveling feet provide a stable platform even on uneven surfacesMagnetic5 LevelsBlackUPC/EAN/GTIN: 012527018604