2021 GT Bicycles Grade Al Expert 2021
- Category
- All-road/Gravel
- Design
- Drop Bar, Rigid, non-suspension corrected
- Frame
- Aluminum
- Fork
- Carbon/Composite
- Features
- Disc brake
Geometry
44 | 48 | 51 | 55 | 58 | 61 | |
Stack | 52.4mm | 54.6mm | 56.8mm | 59mm | 61.2mm | 63.4mm |
Reach | 37mm | 37.8mm | 38.5mm | 39.4mm | 40mm | 40.8mm |
Stack to Reach Ratio | 1.42:1 | 1.44:1 | 1.48:1 | 1.5:1 | 1.53:1 | 1.55:1 |
Seat Tube Length, C-T | 42mm | 45.7mm | 49.4mm | 53.1mm | 56.8mm | 60.5mm |
Top Tube Length, Effective/Horizontal Unknown | 53.1mm | 54.5mm | 55.9mm | 57.4mm | 58.7mm | 60.2mm |
Top Tube Slope | 13.9deg | 11.9deg | 10.1deg | 8.3deg | 6.7deg | 5.1deg |
Head Tube Angle | 69deg | 70.5deg | 70.5deg | 72.3deg | 72.3deg | 72.3deg |
Seat Tube Angle | 74.5deg | 74.5deg | 74.5deg | 74.5deg | 74.5deg | 74.5deg |
Head Tube Length | 10.2mm | 11.9mm | 14.5mm | 16mm | 18.7mm | 21mm |
Bottom Bracket Drop | 7.5mm | 7.5mm | 7.3mm | 7.3mm | 7mm | 7mm |
Bottom Bracket Height | 340.5mm | 340.5mm | 340.7mm | 340.7mm | 341mm | 341mm |
Chainstay Length | 44.5mm | 44.5mm | 44.5mm | 44.5mm | 44.5mm | 44.5mm |
Chainstay Length Horizontal | 43.9mm | 43.9mm | 43.9mm | 43.9mm | 44mm | 44mm |
Front-Center | 60.6mm | 60.8mm | 62.3mm | 62.1mm | 63.4mm | 65mm |
Front-Center Horizontal | 60.1mm | 60.3mm | 61.8mm | 61.6mm | 63.1mm | 64.6mm |
Wheelbase | 104mm | 104.2mm | 105.7mm | 105.5mm | 107mm | 108.5mm |
Fork Offset/Rake | 5.5mm | 5.5mm | 5.5mm | 5.5mm | 5.5mm | 5.5mm |
Trail | 127.7mm very high | 117.4mm very high | 117.4mm very high | 105.3mm very high | 105.3mm very high | 105.3mm very high |
Mechanical Trail | 119.2mm | 110.7mm | 110.7mm | 100.3mm | 100.3mm | 100.3mm |
Wheel Flop | 42.7mm | 36.9mm | 36.9mm | 30.5mm | 30.5mm | 30.5mm |
Standover Height | 70mm | 73.1mm | 76mm | 79.1mm | 82.4mm | 85.1mm |
Tire to Pedal Spindle | -457.4mm 170 mm cranks | -457.2mm 170 mm cranks | -455.7mm 170 mm cranks | -455.9mm 170 mm cranks | -454.6mm 170 mm cranks | -453mm 170 mm cranks |
Pedal Spindle to Ground Clearance | 170.5mm 170 mm cranks | 170.5mm 170 mm cranks | 170.7mm 170 mm cranks | 170.7mm 170 mm cranks | 171mm 170 mm cranks | 171mm 170 mm cranks |
Al Expert 2021 Build
44 | 48 | 51 | 55 | 58 | 61 | |
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 | 37mm | 37mm | 37mm | 37mm | 37mm | 37mm |
Tire Width Max | 42mm | 42mm | 42mm | 42mm | 42mm | 42mm |
Tire Outer Diameter | 696mm | 696mm | 696mm | 696mm | 696mm | 696mm |
Bike Length with Tires | 800mm | 800.2mm | 801.7mm | 801.5mm | 803mm | 804.5mm |
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 ScaleCategory Trend
All-road/GravelSource:https://www.gtbicycles.sk/bicykle/2021-gravel-bike/grade-expert