2021 GT Bicycles Grade Al Expert 2021

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 Scale
Category Trend
All-road/Gravel
Source:https://www.gtbicycles.sk/bicykle/2021-gravel-bike/grade-expert