I have a Peugoet Mercier 5 speed road bike (from the 1980s) which I’d like to use on a Tacx Flux S. Will it work, or do I need a more modern bike? I have read that the minimum cassette size for the Tacx is an 8 speed cassette, but I’m not sure if a 5-speed can just be easily adapted to an 8 speed?
I’d be very grateful for any help, thank you!
you may want to check with Garmin customer support first
The biggest problem I predict with that bike on any direct drive trainer will be the rear axle spacing, which is probably less than the minimum 130mm width. Steel frames can have the axle spacing widened, though I doubt it would be worth paying someone to do that.
yeah feel like that is almost certainly not worth it
Here’s an example of how people do it at home in case you want to get into that. Using a threaded rod is the best method for home mechanics without specialty tools. Personally when I do this I also check the frame alignment and dropout alignment afterwards, but for a trainer bike that won’t go out on the road that’s probably unnecessary. On some frames the right chainstay is heavier gauge tubing than the left which may cause the frame to go out of alignment if you’re just applying equal pressure to both sides as in this example.
