2023 GT Bicycles Grade Expert Base 55
Build
700C/29 in × 37 mm
Insights
Average stack and reach vs trend of all-road/gravel bikes
Stack and Reach vs. Category Trend
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Geometry
| Stack | 590mm |
| Reach | 394mm |
| Stack to Reach Ratio | 1.5:1 |
| Seat Tube Length, Unknown | 531mm |
| Top Tube Length, Effective/Horizontal Unknown | 574mm |
| Top Tube Slope | 8.3deg |
| Head Tube Angle | 72.3deg |
| Seat Tube Angle | 74.5deg |
| Head Tube Length | 16mm |
| Bottom Bracket Drop | 73mm |
| Bottom Bracket Height | 275mm |
| Chainstay Length | 445mm |
| Chainstay Length Horizontal | 439mm |
| Front-Center | 62.1mm |
| Fork Offset/Rake | 55mm |
| Trail | 53.3mm mid/neutral |
| Mechanical Trail | 50.8mm |
| Wheel Flop | 15.5mm |
| Standover Height | 791mm |
| Tire to Pedal Spindle Distance With 170 mm cranks | -455.9mm |
| Pedal Spindle to Ground Clearance With 170 mm cranks | 105mm |
Base Build
| Wheel Size | 700C, 29 inch (622mm BSD) |
| Tire Width | 37mm |
| Tire Outer Diameter | 696mm |
| Suspension Type | Rigid, non-suspension corrected |
| Bar Type | Drop Bar |
| Frame Material | Aluminum |
| Fork Material | Carbon/Composite |
| Brake Type | Disc |
Source:https://www.gtbicycles.com/media/catalog/product/g/2/g21_geo_grade.jpg