A cycling trainer. 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. Simply attach the handlebar-mounted shifter to change resistance during your workout without having to leave your bike. Specifications: Magnetic resistance unit provides a quiet and frictionless ride; Linear resistance boosts workout intensity to match each pedal stroke and gear click; Comes with convenient, adjustable handlebar- mounted shifter; Noise level at 20 mph is 70-74 decibels; Eccentric leveling feet allow for easy adjustment on uneven surfaces; Precision-machined alloy roller reduces tire wear and slippage; Comes on the CycleOps foldable Classic frame with spring loaded, bolt-action lever; Adjust tire fit to resistant unit with a convenient turn knob; 2'' resistance unit roller allows for 650b, 700c, 26'', 27'' and 29'' wheel sizes – up to a 2.0 tire; This trainer is designed to fit common road and mountain bike frames with included steel quick release skewer and has three settings for rear dropout spacing: 120mm, 130mm and 135mm; Trainer tire recommended; Compatible with virtual training apps; All of our trainers are tested to the combined weight (rider and bike) of 300 lbs; Optional thru-axle adapter available for 142x12mm and 148x12mm bikes.