Special lanes devoted to bicycles are virtually non-existent, except a few quite short routes –which are built mainly for sport, not transportation- along coastal avenues or parks in the big cities like Istanbul or Izmir. Terrain of the country is mostly hilly, another factor which makes long-distance cycling in Turkey more difficult. If it is the case that you have already made up your mind and give cycling a try in your Turkey trip, always stay as much on the right side of the roads as possible; avoid riding a bicycle out of cities or lightened roads at night, do not be surprised by the drivers horning at you, and do not enter the motorways, it is forbidden. You could better prefer rural roads with much less traffic density, but then there is the problem of freely roaming sheepdogs, which can sometimes be quite dangerous. Rural roads also have much much less signboards than the highways, which turns them into a labyrinth, in which it is easy to get lost even for non-local Turkish people, without a detailed map.
Great Explorations offers a 10 day/ 9 night cycling tour along the coast, beginning in Bodrum and finishing in Antalya staying in 3&4-star hotels. By incorporating a 'blue-cruise' between Gocek and Olympos, the busier and hilliest sections are avoided and you get to enjoy a few days exploring the Aegean Sea by yacht.
Air can be pumped into tyres at any petrol station without a charge. Bicycle repair-shops are rare in cities and cannot be easily found, motorcycle repair shops can be tried alternatively (however, they are very reluctant to repair a bicycle if they are busy with their customers who have motorcycles).
In Istanbul’s Princess’ Islands, renting a bike is an amusing, cheaper, and obviously more animal-friendly alternative to hiring a horse-drawn carriage. On these islands well-paved roads are shared only by horse-drawn carriages, bicycles and public service vehicles (like ambulances, police vans, school buses, garbage trucks etc).