Specialized Roubaix Sport 2025 Review. What specialized have created with this iteration of the roubaix is an extremely good endurance road bike, one that will offer genuine gains in both comfort and performance. The roubaix sl8 is the smoothest road bike our ride science team has ever tested—reducing impacts at the bars and saddle by 53% vs.
Aimed at reducing fatigue by smoothing out vibrations and hard bumps over time, specialized claims it has tested rival brands’ endurance road bikes over a set test which saw a rider hitting bumps. The specialized roubaix sl8 expert is a road bike designed for comfort and performance on long rides.