I have been very happy with my Kreitler Challenger rollers with "Killer Headwind" fan accessory (see www.Kreitler.com for details). They do help greatly to smooth out your pedaling stroke and teach you to ride in a very straight line, unlike a wind trainer, which is great for pure fitness training but not for technique. Kreitlers are extremely well-made and very durable.
Unfortunately for me, I can no longer use my rollers due to a lingering health problem and would like to sell them. You can e-mail me if you are interested: lsc@sisqtel.net



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