Bike Rollers Cycling Indoor Trainer with Resistance, Adjustable Foldable Fitness Folding Bike Bicycle Trainer for MTB Road Riding Exercise Training, Black

This replaced a 25 year TACX roller with PVC drums which had warped over time. Pleasantly surprised at how light and compact this roller is. Drums are perfectly true with a little radius at the ends to prevent riding off the edge. Super smooth (assuming your wheels are round) and quiet too. At 110 psi with 28mm tires, there's enough resistance to spin a 50/13 gear, changing to 50/12 for intervals. If you need more resistance, just lower your pressure to 100 or 90 psi, it's pretty easy to dial it in. I find that a minimum speed of about 24 mph is good for stability - you don't want to be lurching from side to side. And finally - if you have pets keep them out of the room you're in because that bouncing drive belt might tempt them to attack.

Not sure where to get started. Poor built quality, sharp edge that may cut your hand. Most importantly, there is no bearings for the roller. After paddling for 10 sec, I smell something burning and this is what happened( see pics attached)

It works great ,, I have tried it out on a 20 inch bicycle . A 20 inch Unicycle and a 29 inch bike.. It and me will be getting a workout this winter 10/24/21

These rollers ride really nice. My only suggestion is if you’re going to put a step platform on them it should be bigger and on both sides. It’s so small that the footing is unsteady when using it. And would be better to have on both sides to accommodate either preference.