When traveling you can either visit many different locations, towns, cities or you can chose a destination based model and settle down. The same applies to cycling holidays. You're either a transit tourist or a destination based. Those in transit usually travel on own bikes, with their gear, while destination based tourists often opt for renting the gear.
By renting bikes you do not have to worry about transporting your own you only need to pack your clothes, some gear, hop on the rental and start exploring!
First check the map below, select "Gear and Shops". Many of the shops provide rentals and there's hardly a place, town, village or city on the Adriatic that doesn't have their own bike, scooter, e-bike and quad renting company. The benefits of renting are many and for as much as 10€ per day you can get a road worthy bicycle. With slight upgrade you can get real road and MTB bikes with insurance, road assistance and many other options.
Many companies in Croatia offer guided tours for both road and MTB cyclits, as well as e-bike tourists. Those are tailored to individual needs and usually are the best value for the money. Companies like Adria Bike,IslandHopping,Katarina Line and others offer many set tours or you can just rent their bikes, get your friends together and set off to explore the beautiful Croatia.