Offering an unprecedented combination of comfort, efficiency, and nimble handling, the Sirrus X excels on pavement, dirt, and any terrain in between.
SMOOTH, COMFORTABLE, AND EFFICIENT – Sirrus X provides the smoothest ride in its class. With bigger, confidence-inspiring tires, a slightly more upright riding position, and a super intuitive one-by drivetrain.
RIDER-FIRST ENGINEERED – Like all Specialized performance bikes, the geometry of each frame is uniquely crafted. This means that for every frame, each tube size is specifically selected to achieve the optimal balance of rigidity, weight, and responsiveness to ensure that no matter what size you’re riding, you will experience the world’s best ride.
NIMBLE – Class-leading light-weight, exceptional pedaling efficiency, and steering precision merge for confident, nearly telepathic handling characteristics.
– Lightweight A1 Alloy frame with clean internal cable routing, 3.5lbs (1.7kg). – Maximum control through intuitive shifting with 1×9, 11-46t wide range gearing, and powerful hydraulic disc brakes. – Float over rough terrain with fast rolling Specialized Pathfinder 40c tires featuring proprietary Gripton rubber compound.
Geometry
Size
X-Small
Small
Medium
Crank Length (mm)
165
165
170
Handlebar Width (mm)
680
680
680
Stem Length (mm)
60
70
80
Saddle Width (mm)
155
155
143
Seatpost Length (mm)
300
350
350
Stack (mm)
593
555
563
Reach (mm)
393
400
408
Head Tube Length (mm)
139
147
175
Head Tube Angle (°)
70
70
71
Bottom Bracket Height (mm)
288
288
288
Bottom Bracket Drop (mm)
70
70
70
Trail (mm)
76
76
69
Fork Length, Full (mm)
395
395
395
Fork Rake/Offset (mm)
51
51
51
Front Center (mm)
628
637
646
Chainstay Length (mm)
440
440
440
Wheelbase (mm)
1058
1068
1077
Top Tube Length, Horizontal (mm)
557
567
584
Standover Height (mm)
636
636
641
Seat Tube Length (mm)
395
450
500
Seat Tube Angle (°)
73.5
73.5
73.5
Sizing
Size
Rider Height (in.)
Rider Height (cm)
XX-Small
4’8″–4’11”
142–150
X-Small
4’11″–5’2″
150–158
Small
5’1″–5’5″
155–165
Medium
5’5″–5’9″
165–175
Large
5’9″–6’0″
175–183
X-Large
6’0″–6’4″
183–193
XX-Large
6’4″–6’6″
193–198
* Sizing is intended as a guide. If you are between sizes, consider your riding style and preference.
