Shimano’s mid-range groupset offerings – Tiagra and 105 – are some of the most common groupsets among amateur cyclists.
Shimano is the world-leading manufacturer of components, and for a good reason. They are trusted by much of the pro peloton and have supplied the groupsets on every winning men’s Grand Tour bike since 2020.
So, it begs the question, is it worth the upgrade? What’s the difference between Shimano Tiagra vs 105?