Triumph will also launch a special edition version called the âGold Lineâ Credit where it’s due, the Bonneville family has to be the main reason why Triumph rose to great heights, just like a phoenix rises from the ashes. Over 3,67,000 units of the modern classic series have been sold since 2001. When the entire product lineup underwent a major revamp in 2015, the Street Twin emerged as a darling for those who wanted the classic British twin experience but in a slightly modern avatar. It has since gone on to become the most popular motorcycle of the bunch, selling more units than any other model so far. After the mid-life update in 2018, Triumph has made the Street Twin a lot more desirable in 2021.