Torker’s 520 is a step above the upright style and comfort of the T-510; spec’d with a wider range of gearing - 24 speeds, and higher quality cranks and shifters. It’s suspension fork and shock absorbing seatpost make for a more comfortable, smoother ride. Using a lighter weight aluminum frame, and the lighter rotational weight of the alloy wheels, the T-520 delivers pavement-riding performance at a pleasant price.