If you’re staying in Ajaccio and want to conquer the Corsican climbs, don’t settle for options in town! take the train up to Effrico & walk 5 minutes to the shop, rip the pavement up on your way back with one of their top-of-the-line rentals. Very reasonable price (even including carbon rims), super easy to book & they made sure everything was right over email before I arrived from the US. Plus I was able to arrange for pickup from my hotel at the end - very convenient after a long day in the hills.