Specialized Sirrus 3.0 Bike Size:M which registers even the smallest

which registers even the smallest movement

Constructed using our TruMotion® 4-way stretch fabric

Headset: Rocky Mountain | Loose Ball Bearings | 1-1/8" Crown Race

Rear Derailleur

Specialized Sirrus 3.0 Bike Size:M which registers even the smallestSpecs Technology FAQs Life Moves Fast, Now You Can Too. You have places to go, people to see, and fitness goals to achieve. We get itlife moves pretty fast, so it's a good thing we made Sirrus to help you with all of it. Wherever you're heading, Sirrus will take you there. Light as a Feather Sirrus features a super light Aluminum Alloy and carbon fiber construction, as well as reliable MicroSHIFT components that are built to withstand years of daily