2017 Ridley Bikes Helium X Base

Design
Drop Bar, Rigid, non-suspension corrected
Frame
Carbon/Composite
Fork
Carbon/Composite
Features
Rim brake
Somewhat aggressive stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Somewhat upright stack and reachvs category
Somewhat upright stack and reachvs category

Geometry

XXS
XS
S
M
L
XL
Stack
507mm
526mm
542mm
573mm
599mm
625mm
Reach
379mm
374mm
384mm
390mm
396mm
403mm
Stack to Reach Ratio
1.34:1
1.41:1
1.41:1
1.47:1
1.51:1
1.55:1
Seat Tube Length, C-T
450mm
480mm
510mm
540mm
570mm
600mm
Seat Tube Length, C-C
410mm
440mm
470mm
500mm
530mm
560mm
Top Tube Length, Effective/Horizontal Center
515mm
525mm
545mm
565mm
585mm
600mm
Top Tube Length, Actual C-C
501mm
509mm
529mm
548mm
567mm
582mm
Top Tube Slope
8.2deg
8.5deg
7.6deg
7.4deg
7.2deg
7deg
Head Tube Angle
71.8deg
72deg
73deg
73.5deg
73.5deg
74deg
Seat Tube Angle
75deg
74deg
73.5deg
73deg
72.5deg
72.5deg
Head Tube Length
107mm
127mm
142mm
172mm
202mm
227mm
Bottom Bracket Drop
68mm
68mm
66mm
66mm
63mm
63mm
Bottom Bracket Height
268mm
268mm
270mm
270mm
273mm
273mm
Chainstay Length
405mm
405mm
405mm
405mm
408mm
408mm
Chainstay Length Horizontal
399.3mm
399.3mm
399.6mm
399.6mm
403.1mm
403.1mm
Front-Center
574.8mm
573.8mm
581.2mm
590.1mm
605.2mm
614.1mm
Front-Center Horizontal
570.8mm
569.8mm
577.4mm
586.4mm
601.9mm
610.9mm
Wheelbase
970mm
969mm
977mm
986mm
1005mm
1014mm
Fork Offset/Rake
45mm
44.6mm
45.8mm
44.3mm
45.2mm
44.9mm
Trail
63.1mm
mid/​neutral
62.2mm
mid/​neutral
54.8mm
mid/​neutral
53.3mm
mid/​neutral
52.4mm
mid/​neutral
49.6mm
mid/​neutral
Mechanical Trail
59.9mm
59.2mm
52.4mm
51.1mm
50.3mm
47.7mm
Wheel Flop
18.7mm
18.3mm
15.3mm
14.5mm
14.3mm
13.1mm
Tire to Pedal Spindle
68.8mm
170 mm cranks
67.8mm
170 mm cranks
75.2mm
170 mm cranks
84.1mm
170 mm cranks
99.2mm
170 mm cranks
108.1mm
170 mm cranks
Pedal Spindle to Ground Clearance
98mm
170 mm cranks
98mm
170 mm cranks
100mm
170 mm cranks
100mm
170 mm cranks
103mm
170 mm cranks
103mm
170 mm cranks

Base Build

XXS
XS
S
M
L
XL
Wheel Size
700C/29 in
622 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
700C/29 in
622 mm BSD
Tire Width
25mm
25mm
25mm
25mm
25mm
25mm
Tire Outer Diameter
672mm
672mm
672mm
672mm
672mm
672mm
Bike Length with Tires
1642mm
1641mm
1649mm
1658mm
1677mm
1686mm

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
Performance Road
Source:ridley