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Rockhopper 29

2026 Specialized Bicycles Rockhopper 29 Comp

Category
Hardtail Cross-country MTB
Design
Flat Bar, Hardtail (Front suspension)
Frame
Aluminum
Fork
Steel
Features
Disc brake
XS - 27.5
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Collection
I've Ridden
S - 27.5
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Collection
I've Ridden
M - 29
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Collection
I've Ridden
L - 29
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Collection
I've Ridden
XL - 29
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Collection
I've Ridden
XXL - 29
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Collection
I've Ridden
Somewhat aggressive stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Somewhat aggressive stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry

Geometry

XS - 27.5
S - 27.5
M - 29
L - 29
XL - 29
XXL - 29
Stack
559mm
573mm
616mm
626mm
640mm
654mm
Reach
375mm
395mm
425mm
445mm
465mm
485mm
Stack to Reach Ratio
1.49:1
1.45:1
1.45:1
1.41:1
1.38:1
1.35:1
Seat Tube Length, C-T
310mm
350mm
400mm
450mm
500mm
560mm
Top Tube Length, Effective/Horizontal Center
541mm
565mm
608mm
630mm
654mm
679mm
Top Tube Slope
29.5deg
25.7deg
23.4deg
18.8deg
14.8deg
—
Head Tube Angle
68deg
68deg
68.5deg
68.5deg
68.5deg
68.5deg
Seat Tube Angle
73.5deg
73.5deg
73.5deg
73.5deg
73.5deg
—
Head Tube Length
95mm
100mm
95mm
105mm
120mm
135mm
Bottom Bracket Drop
43mm
43mm
62mm
62mm
62mm
62mm
Bottom Bracket Height
308.7mm
308.7mm
308.7mm
308.7mm
308.7mm
308.7mm
Chainstay Length
440mm
440mm
440mm
440mm
440mm
440mm
Chainstay Length Horizontal
437.9mm
437.9mm
435.6mm
435.6mm
435.6mm
435.6mm
Front-Center
630mm
656mm
696mm
719mm
745mm
770mm
Front-Center Horizontal
629.1mm
654.1mm
692.4mm
716.4mm
742.4mm
767.4mm
Wheelbase
1067mm
1092mm
1128mm
1152mm
1178mm
1203mm
Fork Offset/Rake
42mm
42mm
46mm
46mm
46mm
46mm
Fork Length, Unknown
475mm
485mm
515mm
515mm
515mm
515mm
Trail
96.8mm
very high
96.8mm
very high
96.6mm
very high
96.6mm
very high
96.6mm
very high
96.6mm
very high
Mechanical Trail
89.8mm
89.8mm
89.9mm
89.9mm
89.9mm
89.9mm
Wheel Flop
33.6mm
33.6mm
32.9mm
32.9mm
32.9mm
32.9mm
Standover Height
658mm
695mm
754mm
781mm
820mm
853mm
Tire to Pedal Spindle
113.3mm
165 mm cranks
134.3mm
170 mm cranks
155.3mm
170 mm cranks
178.3mm
170 mm cranks
199.3mm
175 mm cranks
224.3mm
175 mm cranks
Pedal Spindle to Ground Clearance
143.7mm
165 mm cranks
138.7mm
170 mm cranks
138.7mm
170 mm cranks
138.7mm
170 mm cranks
133.7mm
175 mm cranks
133.7mm
175 mm cranks

Comp Build

XS - 27.5
S - 27.5
M - 29
L - 29
XL - 29
XXL - 29
Wheel Size
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
Tire Width
2.35in
2.35in
2.35in
2.35in
2.35in
2.35in
Tire Outer Diameter
703.4mm
703.4mm
741.4mm
741.4mm
741.4mm
741.4mm
Bike Length with Tires
1770.4mm
1795.4mm
1869.4mm
1893.4mm
1919.4mm
1944.4mm
Crank Length
165mm
170mm
170mm
170mm
175mm
175mm
Handlebar Width
700mm
720mm
740mm
740mm
740mm
740mm
Stem Length
35mm
45mm
60mm
60mm
70mm
70mm

Published Sizing Recommendations

Height
4 ft 8 in
to
5 ft 1 in
5 ft 0 in
to
5 ft 5 in
5 ft 4 in
to
5 ft 10 in
5 ft 9 in
to
6 ft 1 in
6 ft 0 in
to
6 ft 5 in
6 ft 4 in
to
6 ft 9 in

Stack and Reach vs. Category Trend

Very Upright
Somewhat Upright
Average
Somewhat Aggressive
Very Aggressive

The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.

Learn more about the Upright/Aggressive Scale
Category Trend
Hardtail Cross-country MTB
Source:https://www.specialized.com/us/en/rockhopper-comp/p/4221743?color=5445553-4221743
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