As my bike is so old, didn't know if it would work but it seems fine so far. Have a lung disease at 76 but wanted to continue pedalling around town so is allowing me to do that on the hillier bits. Still looks rather old and dilapidated but with the formidable front wheel hopefully disguised by deliberately decrepit look of rest of bike! (Expensive e-bike stolen after 6 months from inside locked facility + tethered by big lock to wall so very wary about getting another). A neighbour installed from the manual - pity to lose my kick stand - and a bit pricey - but it's been great to be able to transform my old Raleigh.