2023 Radon Bikes Spire Disc 8-10 51
Build
700C/29 in × 28 mm
Insights
Somewhat aggressive stack and reach vs trend of endurance road bikes
Design deviates from other sizes of Radon Bikes Spire
Stack and Reach vs. Category Trend
View all sizes
Geometry
| Stack | 520mm |
| Reach | 377mm |
| Stack to Reach Ratio | 1.38:1 |
| Seat Tube Length, C-T | 470mm |
| Top Tube Length, Effective/Horizontal HT Top | 515mm |
| Top Tube Slope | 7.5deg |
| Head Tube Angle | 72deg |
| Seat Tube Angle | 75.1deg |
| Head Tube Length | 120mm |
| Bottom Bracket Drop | 73mm |
| Bottom Bracket Height | 266mm |
| Chainstay Length | 408mm |
| Chainstay Length Horizontal | 401.4mm |
| Front-Center | 574.2mm |
| Front-Center Horizontal | 569.6mm |
| Wheelbase | 971mm |
| Fork Offset/Rake | 45mm |
| Trail | 62.8mm mid/neutral |
| Mechanical Trail | 59.7mm |
| Wheel Flop | 18.5mm |
| Standover Height | 720.1mm |
| Tire to Pedal Spindle Distance With 172.2 mm cranks | 63mm |
| Pedal Spindle to Ground Clearance With 172.2 mm cranks | 93.8mm |
Disc 8-10 Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 28mm |
| Tire Outer Diameter | 678mm |
| Bike Length with Tires | 1649mm |
| Crank Length | 172.2mm |
| Handlebar Width | 400mm |
| Stem Length | 100mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Carbon/Composite |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Published Sizing Recommendations
| Height | 166 cm to 172 cm |
Source:https://www.radon-bikes.de/it/roadbike/carbon/spire-disc-carbon/spire-disc-100-2023/