Riese & Müller got its maintained at Saigon Bike Shop
The Enviolo hub offers fully automatic gearshifts based on riding terrain, pedal cadence and bike speed, and you adjust very smoothly as your feet increase or decrease pedal power, and your revs and pedals. The speeds of pedalling will not affect the hub parts, do not damage the gearbox parts, and do not make a noise when accelerating. Enviolo gearshift products and bicycle transmission solutions allow for effortless shifting, even under load. Variable speed by the balls in the gearbox.