2026 Specialized Bicycles Aethos 2 Expert 54
Build
700C/29 in × 28 mm
Insights
Average stack and reach vs trend of performance road bikes
Stack and Reach vs. Category Trend
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Geometry
| Stack | 559mm |
| Reach | 384mm |
| Stack to Reach Ratio | 1.46:1 |
| Seat Tube Length, C-T | 490mm |
| Top Tube Length, Effective/Horizontal HT Top | 544mm |
| Top Tube Slope | 9.6deg |
| Head Tube Angle | 72.5deg |
| Seat Tube Angle | 74deg |
| Head Tube Length | 150mm |
| Bottom Bracket Drop | 75mm |
| Bottom Bracket Height | 264mm |
| Chainstay Length | 410mm |
| Chainstay Length Horizontal | 403.1mm |
| Front-Center | 594mm |
| Front-Center Horizontal | 588.9mm |
| Wheelbase | 992mm |
| Fork Offset/Rake | 50mm |
| Fork Length (Axle-To-Crown) | 372mm |
| Trail | 54.5mm mid/neutral |
| Mechanical Trail | 51.9mm |
| Wheel Flop | 15.6mm |
| Standover Height | 759mm |
| Tire to Pedal Spindle Distance With 172.5 mm cranks | 82.5mm |
| Pedal Spindle to Ground Clearance With 172.5 mm cranks | 91.5mm |
2 Expert Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 28mm |
| Tire Outer Diameter | 678mm |
| Bike Length with Tires | 1670mm |
| Crank Length | 172.5mm |
| 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 |
Source:https://www.specialized.com/us/en/aethos-2-expert-shimano-ultegra-di2/p/4221565?color=5446311-4221565