2026 TanTan Cycling (Seraph) Gr209 Base 55
Build
700C/29 in × 45 mm
Insights
Somewhat aggressive stack and reach vs trend of all-road/gravel bikes
Stack and Reach vs. Category Trend
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Geometry
| Stack | 608mm |
| Reach | 404mm |
| Stack to Reach Ratio | 1.5:1 |
| Seat Tube Length, C-T | 550mm |
| Top Tube Length, Effective/Horizontal Center | 583mm |
| Top Tube Slope | 8.2deg |
| Head Tube Angle | 71.7deg |
| Seat Tube Angle | 73.5deg |
| Head Tube Length | 80mm |
| Bottom Bracket Drop | 80mm |
| Bottom Bracket Height | 276mm |
| Chainstay Length | 426mm |
| Chainstay Length Horizontal | 418.4mm |
| Front-Center | 638mm |
| Front-Center Horizontal | 633.6mm |
| Wheelbase | 1052mm |
| Fork Offset/Rake | 55mm |
| Fork Length, Unknown | 397mm |
| Trail | 59.8mm mid/neutral |
| Mechanical Trail | 56.8mm |
| Wheel Flop | 17.8mm |
| Tire to Pedal Spindle Distance With 172.5 mm cranks | 109.5mm |
| Pedal Spindle to Ground Clearance With 172.5 mm cranks | 103.5mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 45mm |
| Tire Outer Diameter | 712mm |
| Bike Length with Tires | 1764mm |
| Crank Length | 172.5mm |
| Handlebar Width | 440mm |
| Stem Length | 80mm |
| Suspension Type | Rigid, suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Carbon/Composite |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Source:https://tantanbikes.com/Carbon-Frame-Disc-Brake-Gravel-Bike-Full-Hidden-Cable-Bicycle-Part-Carbon-Fiber-T1000-T47-Max-Tire-70050C-UDH-46T-GR209-p6970685.html