|Progressive Resistance Drum|
The external magnetic resistance option (the black bar and knob that you bolt to the backside of the roller) has been replaced by our innovative progressive resistance roller drum. This new feature gives you a power profile with speed that comes as close as possible to real-road conditions. The cutaway photo at the right gives you a peek at what's inside, the curve below describes the type of curve we see on our dyno, which may be a little different than you experience on your bike for various reasons, including your weight, tire pressure, tire design, power measurement variations, and manufacturing tolerances. Before you chose this cool feature for your own roller, please see the IMPORTANT NOTE below
Here's another cool part for you weight watchers out there ... the total weight penalty (over the same roller without the progressive feature) is LESS than a pound.
No other trainer on earth can do that. You can purchase this drum separately and upgrade your current SportCrafters or CycleOps rollers for only $149
IMPORTANT NOTE: Feedback we have received from various users tells us that many stronger athletes like the ability to do intense climbing intervals by pushing hard at low cadence. The only way we can do that is to steepen the power curve in the higher gears. For those of you accustomed to riding on generally flat roads, the power levels in the higher speed range might feel a little steep, particularly if you're above 150# or you're running tire pressures 100 psi and lower, but it is intended to. For recovery, or for a comfortable spinning speed you might therefore need to be in your small chainring. Have no fear.. your talents will develop quickly at lower RPM's than what you're used to riding on rollers. In the end, you will appreciate the huge range of power options you have available for doing whatever workout you want on rollers.
The drum should be installed at the REARMOST position on the roller
To enable the progressive resistance mechanism, install with the RED CAP ON THE RIGHT
To disable the progressive resistance, and use the roller for easier spinning at higher speeds, simply reverse the drum and install with the RED CAP ON THE LEFT
Installation on NON-SportCrafters and NON-CycleOps rollers
Our axle is 3/8 inch diameter, and is 19-1/2 inches from tip-to-tip. The installed width (on SportCrafters/CycleOps rollers) between the rails is 16 -3/4 inches, (which is the width between the axle nuts).
So, as long as you have at least 16-3/4 inches of available width between your existing rails (the difference can be made up with washers), and no greater than 18-1/2 inches wide on the outside of the rails (to allow for 1/2 inch of exposed axle to be able to install a nut), and the axle hole is either 3/8 inch or can be opened up to 3/8 inch with a drill (and you're willing to do that), you're good to go. If you have any questions, please ask! We don't know all of the rollers out there.. so a complete description and pictures would help a lot!
The only required maintenance is for you to invite your friends over to try out your rollers. When all your friends have rollers, you can have a party. When you have a party, you should invite us.
What customers are saying:
Hi from the UK... just a note to say what a great product you have in your progressive resistance roller drum. i've just upgraded my CycleOps alu rollers with the progressive mag roller and it is soo good ... regards mark :)
I am totally impressed with both SportsCrafters, and the magnetic resistance drum system. Best to you, Greg
Now that I have been forced inside several times, I must say that your roller design is amazing. I have gotten my heart rate higher than I have seen in two years just doing progressive work on the rollers with the new resistance roller installed. At a certain point, it really comes back at you hard. If I were outside, I would downshift at that point, and that is also an option inside. I can’t imagine anyone needing more resistance than this set-up. .... It will be used a lot now that the winter weather has finally kicked in. Cheers, Paul V. Forsythe Manager Team Kenda p/b RACC, USA Cycling Level One Coach
Peter, I love the resistance drum! Thanks a ton and hopefully we can get some guys here buying them. I am going to try to send a constant contact out about the benefits of using rollers and happen to mention that we have yours in stock. Talk to ya soon. Sincerely, Shawn Spencer, Owner Bike Cycles www.bikecycleshop.com
My boys and I did a little experiment before switching the ZRO110 in place. Using a power hub and head unit, we measured the watts produced by the stock rollers at 20, 25, and 30 MPH. After switching in the ZRO110 in the rear roller position, we repeated the experiment. Using these 3 points of data and some algebra, I came up with a curve that almost matches the one you supply in your website chart. After only 2 days of riding the Progressive Resistance Rollers, Peter says:”This is great! I actually have more resistance at a lower wheel speed and more than enough as I increase my speed.” Cheers, Perry Disera, Peter Disera www.pwrper.com/peter Quinton Disera, www.pwrper.com/quinton
... we are loving the rollers, especially with this year’s extended Colorado winter. Myself and the athletes are traveling back and forth from nicer weather to cold and snow and your rollers are making riding inside after riding outside for a week or so easier. The resistance is also making it much easier for the athletes to do high power workouts inside without having to get on the trainer. Resistance feel wise, I can’t tell the difference between your rollers and high quality fluid trainer. Michael Durner | Coach, Military and Veteran Cycling, United States Olympic Committee