Excellent working condition Magnetic resistance unit provides a quiet and frictionless ride. Linear resistance boosts workout intensity to match each pedal stroke and gear click. Stick to your fitness plan year round with the help of the CycleOps Mag+ trainer. It is the perfect way to keep your legs warm when it's cold, dry when it's wet, and safe when it's too dark to ride outside. With this turbo trainer, it's easy to turn your bike into your go-to calorie burner -- no matter the season. Features: 5 easy to change resistance levels. Classic series folding frame. Bar-mounted handlebar remote shifter to change resistance while riding. Bolt action attachment to bike. 1.25" roller size. Wheel Sizes: 650b, 700c, 26", 27", 29"; need adapter for 20-24". Bike Frames: Designed to fit common road and mountain bike frames including those with 120, 130 and 135mm spacings. Accommodates most 29’ers up to 2.25" width. Cash, Venmo, Paypal, Cash App