Wrong sale by too little information. This does not fit on bike with disc-brake.

the rack was not dedicated to my fiido ebike, but as you can bent the metall and add some spacers, change the screw... i have done the job and I am satisfied. just note that this os not some plug and play. there is a little jo. to do. but according to the price, this is OK for me

The luggage rack is very good quality but it is not suitable for a 20-inch folding electric bike with disc brakes at the rear without making a system to adapt it see attached photo.

Just like the product description, perfectly served my Dahon Mariner.