My first (of 3) and only well-used trainer was a magnetic resistance trainer with this design, with 7 or 9 degrees of resistance. I recall asking a bike shop mechanic about the flex, and he looked at me with contempt and said, "What do you think the bike is doing when you ride it?" I was too abashed to come back with a crushing retort, but I did realize that he'd missed the point -- the rear wheel did indeed wag. However, bike shop rats didn't think it a problem, and I did not find it a problem in practice with my steel Miyata 610 or some such, even spending considerable periods in 12th gear on Resistance #9, standing and honking hard.
BTW, this roller, and the 2 fan rollers I've owned, didn't seem to be hard on tires; as I said, I put many miles only on the mag one. On Sun, Dec 31, 2017 at 2:04 PM, George Schick <bhim...@gmail.com> wrote: > .... > > Trainers - some of these have mounts that lock the front fork onto the > stand, sans wheel, and support the rest of the bike frame with a clamp-on > device at the BB shell. The rear wheel then rubs against a magnetically > resistive flywheel affair that can be varied in intensity. Has anyone ever > researched what kind of stresses this setup places on the frame assembly? > > -- You received this message because you are subscribed to the Google Groups "RBW Owners Bunch" group. To unsubscribe from this group and stop receiving emails from it, send an email to rbw-owners-bunch+unsubscr...@googlegroups.com. To post to this group, send email to rbw-owners-bunch@googlegroups.com. Visit this group at https://groups.google.com/group/rbw-owners-bunch. For more options, visit https://groups.google.com/d/optout.
