The Amalfi Coast's SS163 coastal highway climbs 1,400 vertical metres across 50 kilometres of Mediterranean cliffside, threading between Positano's pastel terraces and Ravello's stone belvederes. Carved into limestone precipices in the 1850s to connect fishing villages isolated by geography, the route became a UNESCO World heritage corridor in 1997, recognised for its vertical agriculture and engineered stone terracing that transforms vertical rock into habitable space. Electric bike rental services began operating along the coast in 2019, converting what was once a gruelling gradient into an accessible pedal-assisted traverse for riders of moderate fitness. The terrain's 8–12 percent gradient on coastal switchbacks challenged conventional cycling until battery-assisted motors arrived. Pedal-assist systems now multiply rider effort by 200–300 percent, flattening climbs from Amalfi village at sea level to Ravello at 365 metres elevation. Riders cover 25–40 kilometres per charge depending on assist mode, passing through cultivated lemon terraces where Sfusato Amalfitano fruit grows on hand-built stone platforms secured by chestnut poles. The route intersects medieval mule paths at Atrani and Valle delle Ferriere, where 12th-century paper mills exploited waterfall power before tourism displaced artisan industry. Today's electric bike tours depart from Amalfi, Positano, and Maiori between April and October, when morning light angles across the Tyrrhenian Sea and afternoon thermals push cooler air upslope. Operators provide helmets, panniers, and GPS-loaded route maps marking water fountains, coastal overlooks, and gradient warnings. The most-traveled loop links Amalfi to Atrani via the lower coast road, then climbs to Ravello's Villa Cimbrone gardens before descending through Scala's chestnut forests. Riders encounter limited shoulder width on the SS163, where tour groups time departures to avoid 10:00–16:00 coach traffic peaks. Positano's Fornillo Beach and Praiano's Marina di Praia offer mid-route stops where riders lock bikes to stone bollards and wade into water 18–24 degrees Celsius from May through September. The coast's vertical relief compresses five climate zones into 1,500 metres of elevation, moving from sea-level citrus cultivation to upper-slope oak and maritime pine. Electric cycling opens this gradient to riders who lack the aerobic capacity for conventional ascent, democratising access to viewpoints previously reserved for drivers or hikers willing to endure multi-hour climbs.