The third generation of the Tern GSD is out today – and Dave’s reviewed it. These sorts of updates aren’t always big news, but the GSD has long been one of our very favourite e-bikes and Tern reckons it’s revisited every aspect with a view to making improvements. What’s new? "Everything,” according to Tern Team Captain, Joshua Hon. “Pretty much every aspect of the bike has been redesigned to work better.