Specialized Sirrus X 4.0 Bike Size:S 1218 & 1565 models) to

1218 & 1565 models) to reduce movement while riding

0 that allows for more wiggle room in the toe box and a less constrictive

87% POLYESTER

The rippers of tomorrow need quality gear too

24" Kid's Geometry

Specialized Sirrus X 4.0 Bike Size:S 1218 & 1565 models) toSpecs Technology FAQs Comfortable, Cabale, Confident: Sirrus X 4. 0 Sirrus X is your ticket to riding more, and to places you never imagined possible. Its a comfortable, capable, lets do stuff kind of bike that will inspire you to ride more than you ever have before. With bigger, confidence inspiring tires, a slightly more upright riding position, a super intuitive one by drivetrain, and plenty of mounts for racks and fendersits more than just a solid