2023 Radon Bikes Spire Disc 8-10

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

Geometry

48
51
54
57
60
63
Stack
503mm
520mm
540mm
559mm
579mm
597mm
Reach
376mm
377mm
378mm
382mm
391mm
400mm
Stack to Reach Ratio
1.34:1
1.38:1
1.43:1
1.46:1
1.48:1
1.49:1
Seat Tube Length, C-T
440mm
470mm
500mm
530mm
560mm
590mm
Top Tube Length, Effective/Horizontal HT Top
505mm
515mm
530mm
545mm
565mm
585mm
Top Tube Slope
9deg
7.5deg
6.5deg
5.4deg
4.4deg
3.3deg
Head Tube Angle
72deg
72deg
72.3deg
72.8deg
73deg
73.3deg
Seat Tube Angle
75.6deg
75.1deg
74.25deg
73.8deg
73.3deg
72.8deg
Head Tube Length
100mm
120mm
140mm
160mm
180mm
200mm
Bottom Bracket Drop
75mm
73mm
73mm
71mm
71mm
69mm
Bottom Bracket Height
264mm
266mm
266mm
268mm
268mm
270mm
Chainstay Length
408mm
408mm
408mm
408mm
408mm
408mm
Chainstay Length Horizontal
401.1mm
401.4mm
401.4mm
401.8mm
401.8mm
402.1mm
Front-Center
566.9mm
574.2mm
579.2mm
585.6mm
597.5mm
609.8mm
Front-Center Horizontal
562mm
569.6mm
574.6mm
581.2mm
593.2mm
605.9mm
Wheelbase
963mm
971mm
976mm
983mm
995mm
1008mm
Fork Offset/Rake
44.6mm
45mm
45.3mm
46mm
44.9mm
45.5mm
Trail
63.3mm
mid/​neutral
62.8mm
mid/​neutral
60.6mm
mid/​neutral
56.8mm
mid/​neutral
56.7mm
mid/​neutral
54.2mm
mid/​neutral
Mechanical Trail
60.2mm
59.7mm
57.8mm
54.2mm
54.3mm
52mm
Wheel Flop
18.6mm
18.5mm
17.6mm
16mm
15.9mm
14.9mm
Standover Height
703.2mm
720.1mm
749.4mm
773mm
796.8mm
823.5mm
Tire to Pedal Spindle
57.9mm
170 mm cranks
63mm
172.2 mm cranks
68mm
172.2 mm cranks
74.4mm
172.2 mm cranks
83.5mm
175 mm cranks
95.8mm
175 mm cranks
Pedal Spindle to Ground Clearance
94mm
170 mm cranks
93.8mm
172.2 mm cranks
93.8mm
172.2 mm cranks
95.8mm
172.2 mm cranks
93mm
175 mm cranks
95mm
175 mm cranks

Disc 8-10 Build

48
51
54
57
60
63
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
28mm
28mm
28mm
28mm
28mm
28mm
Tire Outer Diameter
678mm
678mm
678mm
678mm
678mm
678mm
Bike Length with Tires
1641mm
1649mm
1654mm
1661mm
1673mm
1686mm
Crank Length
170mm
172.2mm
172.2mm
172.2mm
175mm
175mm
Handlebar Width
400mm
400mm
420mm
420mm
440mm
460mm
Stem Length
90mm
100mm
100mm
100mm
110mm
120mm

Published Sizing Recommendations

Height
158 cm
to
166 cm
166 cm
to
172 cm
172 cm
to
178 cm
178 cm
to
184 cm
184 cm
to
190 cm
190 cm
to
196 cm

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
Endurance Road
Source:https://www.radon-bikes.de/it/roadbike/carbon/spire-disc-carbon/spire-disc-100-2023/