Whilst in Ubud, we went on a great cycling tour north of Ubud. Including breakfast and lunch, cycles, helmets and 2 guides, this day trip cycles 25km downhill (very easy and OK for unfit people like me). The email address is baliecocycling.com and this is an eco/educational cycling tour - even our teenager was very engaged and had a great day! Make sure you book with them though [apparently there are a lot of companies professing to be this tour company). Our main guide (Damar) was great and extremely knowledgable - he rides in front and a second guide brings up the rear. They also pick up from Sanur, Kuta, Legian, Seminyak, Nusa Dua for no extra cost. Well worhwhile doing!