The SS163 Amalfitana, completed in 1853, remains one of the world's most challenging coastal roads. Its fifty kilometres trace a ribbon between Sorrento and Salerno, threading through thirteen comuni and 1,200 vertical metres of elevation change. Engineers carved the route into limestone cliffs above a 150-metre drop, creating a narrow corridor where motor traffic now competes for space with buses, delivery vans, and the occasional cyclist. The road predates modern tourism by a century, built to link isolated fishing villages that previously relied on boat transport. Cycling the Costiera Amalfitana today demands fitness and nerve. The route's hairpin turns and blind corners require constant vigilance, but e-bike technology has made the climbs accessible to riders who lack competitive conditioning. Electric assist levels the steep gradients between Positano and Praiano, where grades exceed twelve percent, and allows riders to focus on the views rather than oxygen debt. Morning departures avoid the midday coach traffic that fills the road from eleven onward. Most guided rides start in Sorrento, climb the initial ascent to Colli di Fontanelle at 450 metres, then descend through lemon terraces to Positano's vertical harbour. The coastal route passes through territories that supplied grain to ancient Rome and served as summer retreats for patrician families. Maiori's wide beach marks a rare flat section; the Roman military used the landing for provisioning campaigns in Lucania. Medieval watchtowers punctuate the cliffs at five-kilometre intervals, part of a defensive network against Saracen raiders that operated until the seventeenth century. Modern cycling itineraries incorporate stops at these towers, now converted to viewpoints, and at ceramics workshops in Vietri sul Mare, where artisans still hand-paint tiles using cobalt and ochre pigments. Amalfi Coast Cycling Tours typically cover twenty to forty kilometres, a half-day commitment that leaves afternoons free for coastal exploration. The Sentiero degli Dei hiking trail, the Path of the Gods, runs parallel to the road at 600 metres elevation, accessible via switchbacks from Positano. Riders seeking off-road alternatives can follow unpaved mule tracks that connect hill villages like Scala and Ravello to the main coastal settlements below.