After unsuccessful try to use SW-Motech Daypack Pro tank bag on my K 1600 GT, I searched for an alternative and found a new series of tank bags from Wunderlich named CLICK BAG. They offer 5 different sizes, 3L, 6L, 13L and finally 16L. CLICK BAG 3L is not extendable, but remaining sizes expand to 8, 16 and 19 liters respectively. 3L bag is the only one that comes with the rain cover while other bags come with internal waterproof bags. This second solution also keeps your goods dry but I find it not that practical. First, it occupies some space inside and second, it’s more difficult to put the stuff in and take them out. Anyways, the bags are really good quality and they attach to appropriate tank rings very easily, just one click. This attachment system is very similar to SW-Motech Pro but without magnets. Wunderlich is an expensive brand but some of their CLICK BAGS are basically the only safe options for BMW K 1600 GT, namely 3L and 6L. Unfortunately SW-Motech Pro tank bags collide with the fully turned handlebars and random switches might got pressed. Besides that, this may limit the movement of the handlebars to the end which may make turning the bike around more difficult. But let’s see how Wunderlich tank bags fit on K 1600 GT and which one I chose for my bike.