The Saris Basic Mag Smart Trainer gets you going with indoor training at a super affordable price. The Basic Mag trainer comes with five adjustable levels of resistance so you can adapt every ride to your liking Whether your training for a local charity ride or working to beat your friends fitbit score, the mag indoor bike trainer can help you make it happen. Simply connect the trainer to the rear wheel of your bike, hop on & pedal away. It won’t give you the full feedback you get on top end trainers. But it comes with a speed sensor that can record your speed for virtual rides so you can join in on training apps like Zwift. Features magnetic resistance unit provides a quiet & frictionless ride. Linear resistance boosts workout intensity to match each pedal stroke & gear click. Eccentric levelling feet allow for easy adjustment on uneven surfaces. Comes on a sturdy, foldable yellow frame. Adjust tire fit to resistant unit with a convenient turn knob. Resistance unit roller allows for 700c, 26", 27" & 29" wheel sizes – up to a 2.0 tire. This trainer is designed to fit common road & mountain bike frames with included steel quick release skewer & is compatible with rear dropout spacing: 120mm, 130mm & 135mm. Trainer tyrerecommended. Compatible withvirtual training apps All of our trainers are tested to the combined weight (rider & bike) of 300lbs. Trainer skewer included. Optional thru-axle adapter available for 142 x 12mmand 148 x 12mmbikes. Noise level at 20 mph is 72-76 decibels.