According to our research, the Elite Qubo Fluid exercise bike is compatible with bikes that have a standard rear axle with a length of 130 mm or 135 mm and a diameter of 5 mm.
An axle length of 170 mm is a so-called "long axle" or "long thru-axle". The Elite Qubo Fluid Trainer is not designed for these axle lengths as standard.
No such magnet can be mounted on this trainer (as far as I know). I have mounted the speed sensor from the front wheel to the rear wheel (leaving the cadence sensor at the crank) BC connected to Strava. This way I have all the data I want, even online.
(I have a wahoo element as BV and am absolutely satisfied with it).
Dear Judith
If you have "clamped" your road bike and the rear wheel is in contact with the roller (the bars of the Elite Qubo Fluid have been lowered to the rear as far as possible), you should be able to shift gears normally - just like when riding on the road. Shifting gears has no influence on the functionality of the roller trainer, only on the pedalling resistance.
If by your question you mean that all "higher" gears feel too hard for you, it may have to do with the fact that you have no pedalling breaks and no cooling breeze on the roller. In other words, exercising on the roller is a lot more strenuous than on the road.
Best regards,
Martin
P.S.
Have you bought an elevation for your front wheel? This makes training on the roller much more comfortable.
I have an old bike that does not run smoothly on the road. That's why I never asked myself whether the slight fibrations were due to the roller and whether it could be replaced.
I haven't tried it yet, but according to the description it should be possible to clamp anything from 26" to 29". I have only used a road bike so far. With the bike, you should make sure that they have slick-like tyres, preferably without profile.