- by using a nod to common styling and successful efficiency, the Thunderdome boasts round profile tubing created from 7000 Series Aluminum.
A 2x10 (20 speed) Shimano Tiagra drivetrain has an array of gears for riding https://haylingcycles.co.uk/Before-You-Buy-5-Must-Knows-for-Choosing-the-Perfect-Bike