Have experience on rollers, but could not get this set to work properly. Sent it back.

Unfortunately this is the first thing I've ever got from Rock Brothers that I've had to complain about this will not fit any adult bike that is way too short even though I extended the roller as far as it can go it's not even close to front tire should be inside of the front roller not on the outside and it's just no possible way of extending it anymore my son's bike fits perfect for a child put an adult bike not even close the front has passed the front roller and there's nothing you can do thanks operate it very disappointing

Most e-bikes have an increased wheel base. I order this while I was still waiting on my bike to arrive and the bike manufacturer didn't include accurate wheel base measurements. As a result I ended up returning this when it didn't fit on the stand. Not the stand's fault.The reviews are right though, when a normal bike was brought over and used to test it out, it was very hard to balance on and was more of a hazard than a boon.

Works great. Set up near a wall so you can get your balance and start riding. After a few times it comes naturally. 😎

This is an entry-level bike roller, so the 4-stars are relative price/performance, and not relative to other more expensive bike rollers. The overall build quality felt good and solid to me, though the aluminum rollers feel like they wouldn't take much abuse. It came with a spare belt which is cool. Had the product arrived with the roller tension dialed in and ready, I would have given it 5 stars.Out of the box, this thing is not useable in my opinion. You must loosen the roller bearing tension, which as others have mentioned, is far too tight. The nuts required a 17mm wrench. You'll need to loosen the outside cap nuts first to gain access to the interior bearing nut. You'll want to loosen these as much as possible without leaving the nuts free to spin or introducing wobble in the rollers. Once these are spinning mostly free, re-tighten the outside nuts to secure the rollers. After that, you will want to place your bike on the rollers to examine the spacing of your front wheel. You will want your front axle to be directly above the front roller. The product is adjustable if necessary and there's a video associated with this product listing showing how that's done.Once the bike roller is set up, you're ready to get started. You'll need to find a level place where you can lean against a wall or hold something reasonably sturdy in order to start pedaling from a stopped position. A wall is better than a stool, since you can lean against it with your shoulder (not your elbow) and start pedalling with both hands on the handle bars. Start pedalling and try to gain balance on the rollers a little at a time. It doesn't take too long (15 - 60 minutes ?) to catch the hang of it but at the beginning it will seem impossible, as well as a bit scary. There are reasons for this which I discuss below, but if you're determined, you'll get there.Videos make it look easy, right? So why is it so hard when you're just starting out? Well, in a word.... momentum. You will have none and on a bike roller, you'll never have any. This is important because outside help we get from the gyroscopic effect of rotating wheels, momentum solves a lot of problems for you while riding a bike down the road. It allows you to take the road at your own pace, and keep the bike under you if you encounter a rough patch or trouble. There is a big departure from these things on rollers. 1.) You must keep pedalling in order to keep the bike under you. The instincts you developed to coast, and allow your forward momentum to keep the bike under you when encountering trouble will be of little use on bike rollers. On rollers, the lack of forward momentum means coasting is very unproductive at solving problems. If you run into trouble, you'll need to learn to pedal your way out of it. Adjusting your riding style like this isn't automatic. Though it takes effort, it comes reasonably quickly for most riders. Pain and fear make these lessons go quickly. It took me one hour and one broken closet door to get there but I made it. 2.) You can't take the ride at your own pace. There are no breaks unless you depart the bike. Rollers demand you keep the minimum amount of speed to stay upright on the bike. You may get good enough to slow it down but it will never be zero like it can be on the road. Every ride is continuously uphill. Because of this, be patient with how long you can sustain a ride. Two minutes doesn't sound like much, but it's a good goal if you're buying this to get back in shape and haven't ridden in a while. This sounds very short but with the amount of work you will be doing to stay upright and the fact that you can't coast, your heart rate will jump quickly and your quads will burn before you know it. So take frequent rests as you go. On the upside, because the work is in short spurts, I didn't notice much muscle soreness afterwards, despite disembarking from the bike with my legs on fire.Bottom line: this is an affordable way to keep riding, either in tight spaces or when weather is inhospitable to cycling. These are cheap rollers. My guess is, if can master these, better ones will be even easier if you decide to move up a model. There are obvious compromises which shouldn't be a surprise at this price mark, and they might be a little frustrating, but none of them prevented me from using the product. With proper expectations and persistence, you'll probably enjoy this product.

Got this product a day earlier than expected, and is actually very good quality. My son loves it and it's great because it fits a 20" BMX bike, which most other trainers don't support. Great for training during the winter season.

If you’re new to rollers (as I am), set this up in a doorway instead of by one wall. You can use your shoulders/upper arms on the doorframe this way, when needed, and make it way harder to slip off. It helps if you have a smaller than average doorframe, too. When the front wheel wigs out, pedal harder to straighten it. YouTube tips help! I haven’t fallen off once but I would have if I didn’t have “walls” hugging me on both sides.I had to adjust the front roller to the furthermost slot for my “X-small” 29” mtb with a wheelbase 1065 mm, and it is a hair away from being too short. Still stable enough, though, so I’m happy with it.I also loosened the rollers with the two included wrenches as the rollers are probably too factory-tightened. You need to hold the wrenches on both sides to adjust them. If the roller clicks after adjusting, you did it unevenly.Funny mistake I made: I thought the plastic belt had to reach the back roller, too. So I spent a comical amount of time trying to remove it without taking it all apart. Then I gave up and tied it out of the way, got the extra plastic roller included in the box and did it my way. Just now realized I set it up wrong. Still worked. It’s really sturdy considering all I did, and how it folds/unfolds with regular use.I tested it on my regular treaded tires while I wait for the right ones to arrive, so it is noisier (sounds like an old school treadmill with an extra buzz) but I don’t have close neighbors to annoy for 15-30 mins at a time.

I would like to say that these rollers are great! They were my first set of rollers and after doing some research I decided to go with these Rockbros rollers because of the price.Out of the box, you should expect to tune and set up the rollers to your bike. But the instructions did not mention anything about the inner bearing bolts that actually makes it roller smoother if you loosen them this is great for novice riders.I'm giving these 3 stars because I was sent a used unit (with the previous buyer's address still on the box) missing the tools to actually tune and setup my rollers. I had to do with the tools I had laying around after spending about an hour setting it up without proper tools ( should have come in the box) I was set up and the rollers were great.I would have given these 5 stars if I didn't have missing tools and the manual actually mentions loosening the inner bearing bolts for a smoother ride, I found out about this trick from one of the comments here.

Solid built, light weight. I have put 1000km on this roller in two weeks, no complaints,

I was looking for a reasonably priced bike roller that didn't feel cheap and this seemed to fit the bill. It does feel pretty sturdy and folds up nicely, but there are some big drawbacks. For beginners, the drums are really tight. I had to take out all the drums and loosen the inner bolts so it would roll a bit smoother. The other drawback, the exposed nuts are huge, as you can see from my image. The second day I had it, the rear wheel slide off the roller hitting one of the nuts and now I need a new inner tube.I'm sending this back and will be purchasing a different roller without the large exposed nuts and bolts. It just seems like they took the cheapest production route they could.

This is my 4th set of rollers, having previously owned Tacx and Cycleops.The main differences between RockBros and others is that each roller needs to be tuned when you set up. This because each roller has a nut on each side of the frame and sleeve between the two nuts. There is a 4th cross bar near the front rollers. It's a little extra work at first, but results in smooth and quiet rollers.Strengths:-The overall design and quality of components is very good, better than my Cycleops.-Very quiet compared to Tacx or Cycleops. I think some of this is due to the additional cross bar and the roller axle mounts.-The roller width is 17inches compared to 12inches. Not sure this make a huge difference but some might like the extra space.-Perfect height, when using on a rubber mat the legs are hight enough to prevent the band from rubbing on the mat.-Comes with wrenches and Allen key.Challenges-The additional cross bar needs to be removed when first installing or changing bands. This is a bit tricky as the Allen key that holds the bar screws into a plate that slides down the tube.-The band is a stiff plastic that goes on very tight and provides a constant resistance. I personally don't like this, I swapped the bands with a spare soft rubber band. I would use an external mag resistance device if I wanted a load on rollers.I would buy again.

I haven't used any bike rollers apart from these, so I have no real basis for comparison. These function as advertised, seem pretty sturdy, and are easy to assemble. At points the printed directions are slightly confused, but not to the point of making the task impossible. The rollers provide a surprisingly intense workout, which is great! If you're a novice on rollers, expect to spend your first few sessions learning how to be comfortable with balancing. I strongly advise wearing a helmet and situating yourself in a narrow hallway or a doorway until you feel entirely comfortable on rollers, which may be longer than you expect. I found that my wife's stationary exercise bike made a poor landing pad when I toppled off -- after prematurely concluding that I was comfortable.

I got these over the Minoura given the price difference as I couldn't justify the cost as I've only recently gotten back into biking. Folds up nice and small and easy enough to setup.The rollers don't appear to parabolic and if they are, it is a very slight curve. That said, with some practice they aren't that hard to use. It will definitely be a challenge for first timers, rollers in general are. I think the resistance mag unit will help as the low level of resistance and my fixed gear bike mean fast pedaling.The rollers did come a bit damaged, but it seemed like a shame to return it since it still worked. The seller was good about it and provided a slight refund of it, note I didn't as for a return or refund outright.The band that connects the front roller and first real is a harder plastic than I anticipated, but seems fine other. A second is provided (along with a couple of wrenches and hex key), so there is that.All in all, they are a good deal and can, at the least, get you started in the world of rollers.