I can't really answer most of your questions, but I have owned a set of Kreitler Dyno-Mytes (2 1/4" rollers) for that past 12 years. I wouldn't change a thing about them. They offer an incredible amount of resistance, so much that I have to use an electric box fan to cool myself during the workout. They've been reliable, and fairly quiet. I used them frequently when I lived in an apartment, and had no complaints from neighbors.
Thanks for the feedback Svr. I'm actually looking at the larger drums with the killer-headwind, because I like the idea of powering my own fan. The Kreitler salesman said the killer-headwind attachment is no louder than a typical ceiling fan, but that doesn't sound likely.
Thanks and safe riding this weekend!
I sprint up to around 1000W (powertap/SRM) on 4.5's with a headwind fan, I think the rollers could go higher than that but my sprinting form limits me right now in that I don't want to break my neck trying to go higher!
As designed you can't adjust the Headwind while on the bike, but I have never wanted too, in fact I played with the positions, found the one I found most road like in feel and used tape to fix the position so it would be the same all the time. I don't think it would be that hard to affix a dowel or something similar to the headwind fan though so that you could make adjustments if you wanted.
Noise wise, I think its fine, on par with a lot of turbos. I watch cycling videos or cycling.tv while I ride and I turn them up a bit and it works fine. I close the door to my office and haven't woken up the kids or hear complaints from the wife, and believe me she would say something if it bothered her.
I wouldn't call myself a hammerhead but can't see myself needing more resistance than the 4.5's and the fan give me. I don't really ever adjust it either, I have the resistance on the fan set near the lowest and using my gearing normally I have the range I am looking for from recovery up to sprinting.
I have never owned/ridden 3.0's but I had the smaller 2.25's (?) and I didn't like them. The resistance of the smaller rollers makes it hard to just spin and the smaller rollers require a bit more concentration to ride so that starts to limit what I can do at high speed. On 4.5's I have gotten to where high speeds are still plenty controllable.
I don't know that one is louder than the other, I also have always had the all alloy rollers. My reasoning is that the higher mass should give you more inertia, ie more lifelike spin down if you stop pedaling. How important this is, or if I would like the plastic caps, I don't know but I do love the feel of the all alloy rollers.
Very happy though with my 4.5's and headwind fan, haven't been on a stationary since and by adding in a powermeter, I can't see me wanting anything more for indoor training.
I've ordered a set with the fan based on your report.
I've been riding an old set of plastic Performance rollers with two hydraulic resistance units mounted on it, but I don't get very far into the big chainring with those things.
Not going to be doing much sprinting with the new Kreitlers, just tempo and cadence work, so the fan will probably be enough. Think I'll go check Kreitler's website to see if it's possible to mount an additional fan on the left side...
Without some modifications I don't see a way to easily mount another headwind fan. There isn't anywhere to put the second belt on the front, you might be able to mount one on the rear though.
Another option would be the flywheels Kreitler sells that mount on the rear of the frame, I forget how much but they do add some resistance to the trainer. They make one for either side of the trainer. I have read where some people like using one on each side for the added inertia. Since I had the fan I only bought one, but I think it would work better with two flywheels. With only one on the rear you end up with only one belt on the rear drum and on mine it caused a weird squeak from the uneven pulling on the rear drum. The flywheels are kinda expensive considering they are really just weights and a rubber band but eventually I think I will get another flywheel and run one on each side. Then again I am pretty happy with feel right now.
Holy crud. I don't think I'll be needing a second Killer Headwind attachment.
I'd always needed two sweat-towels per workout before, but I only needed one tonight and that, a snot towel because I actually got cold! On my older rollers, I would usually start sweating and steaming furiously about 20 minutes into a workout, which always looked impressive when one of my neighbors walked by, but the only steam tonight was from my breath and my nipples were hard the whole time. Brrr!
After riding my cracked plastic rollers for nearly a year, these rollers were glassy-smooth. It's going to be tough riding on the textured asphalt roads on weekends after riding these dreamy rollers every night after work.
The resistance was slightly less than it was with my two hydraulic units, but because of the cold air blowing on me tonight, I wasn't able to get my heartrate past 170bpm; and decreasing the effort immediately brought the heartrate right back down immediately.
The fan is about 30-40% louder than my old rollers, but I'm going to affix some sound-absorptive material on the inside, which should quiet it down nicely. Don't believe the Kreitler salesman who tells you it's about as loud as a ceiling fan--that's bull. They're about as loud as a modern automobile at idle with the hood open, which still isn't terrible.
Another nice thing about these rollers--because they are mounted so high on the frames you can put them on plush carpet without the drums or belts contacting the carpet--not possible with my previous rollers.
Very pleased with the quality, ease of adjustability (to accommodate varying wheelbases) and the ride. If anyone in the San Diego area would like to give them a whirl, I'm in Carlsbad.
P.S. They sure got them to me quickly too!
Last edited by calamarichris; 01-30-08 at 12:35 AM.
Thanks for the helpful tips Kytree. If you ever make it back to C'bad, I'd love to go for a ride.
I've been here for 8 years and it's still a great place to ride, but make it quick because they're developing the bejeezus out of it and turning it into another Orange County.
Last edited by calamarichris; 01-30-08 at 12:48 AM.
I just have to rave about these rollers one last time.
They're taking some getting-used-to because my previous rollers were cracked and always gave you a satisfying (but still false) impression of speed (much like a Harley-Davidson): the faster you pedaled, the the smoother they felt. These Kreitlers are so smooth that I feel like I'm not getting any feedback (aside from little digital numbers denoting cadence and heartrate.) I even put one of the little dog-stickers on my front drum so I can watch it spin, but it just blurs into nothing at speed.
By aiming the Headwind-fan away from me, I found that I'm able to duck out of the chilly wind, but then lean into it when I start to get sweaty.
With my previous rollers, I was drenched in sweat, heartrate topping 170 within half an hour and typically needed two full-size bottles of water for a 40-minute workout.
But last night I was able to ride at a decent clip for 1:20 and able to control my heartrate as if it were on a dimmer switch. (e.g. "10 minutes at 163, then five minutes at 159.")
This is the greatest thing since Look pedals.
Last edited by calamarichris; 02-01-08 at 01:14 PM.