Want to buy a Mountain Bike Tandem for myself (186cm, 90kg) and my daughter (150cm, 50kg). I am a complete novice and we mainly want to cycle socially, definitely not to win races! Will predominantly cycle on gravel roads and in town. We are staying in Swakopmund, Namibia, lovely area for mountain biking, but tandems are very scarce, therefore no real opportunity to try out different ones. I am quite interested in the Avalanche Envi 29MTB Tandem - any comments on this specific bike?