Join Date: Jun 2009
Location: Castle Rock, CO
Bikes: '09 Gary Fisher "Kaitai, '09 Raleigh Team", '91 Trek 8700, '97 Cannondale SR500, '12 Raleigh Twin Six
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I have both a CycleOps Fluid2 and a Kurt Kinetic Rock and Roll trainer. They are both great. I have a bike dedicated to the trainer so some of the wear and tear issues may be a little more pronounced for someone who is constantly swapping bikes or removing a bike to ride outside.
I've put about 2500 miles on the Fluid2 in three years. It's been bombproof for me. I've read a lot of reviews that say this trainer is prone to leakage, but that has not been my experience. The platform is stable, and the mounting system and drum adjustments are simple and intuitive. It is all one piece (once assembled), and the legs fold in when not in use so that it is reasonably compact and can be easily stored. I can spin as high a cadence as I want and it is as stable as can be. I now have it set up for my wife. I would still be using it 3-5 days a week if she hadn't asked for her own setup.
This January I picked up the KK Rock and Roll trainer because my wife wanted her own and I've been curious about this trainer for some time now. The R&R is a high quality product. The base is W I D E and stable. You need space to both use and store this trainer. The resistance is slightly less than the Fluid2, but it has a more natural feel to it. The rocking motion makes time on the trainer a lot more comfortable than a static trainer. It has adjustable pre-load for the lateral stiffness, so it can be fine tuned to your needs. Even though the resistance is lighter, I find this trainer gives me a more total workout. It forces you to use your core muscles to center the bike, and it gives you the option for out-of-the saddle training (although, I've tried it and there is nothing natural feeling about being out of the saddle on it). Mounting and drum adjustment is not quite as simple as the Fluid2, but it is still pretty easy (I would be less inclined to taking the bike on and off the KK trainers). The one complaint I have about the R&R is that high cadence-low resistance spins are kind of scary. I'm 6'1" and 205lbs. At 100-105rpm, I can keep a pretty steady cadence, but when I start getting up to around 110, it starts bouncing so violently that I don't feel safe maintaining pace. Maybe I need to work on my technique, but I don't have this problem on the Fluid2. I have seen other reviews with similar comments.
I know that comparing these two products is not exactly apples to apples, but if I were shopping for a static fluid trainer, both KK and CO make great units. The KK is guarunteed against leakage, but like I said, this hasn't been an issue for me on the CO. My personal preference is for the simple setup and compact design of the CO trainer, but with a dedicated bike it's not really an issue. The KK has a little more natural feel, but takes a higher gear to get the same kind of workout.