2021 Giant Bicycles FastRoad SL 1

Category
Fitness
Design
Flat Bar, Rigid, non-suspension corrected
Frame
Aluminum
Fork
Carbon/Composite
Features
Disc brake
Average stack and reachvs category
Somewhat upright stack and reachvs category
Somewhat upright stack and reachvs category
Somewhat upright stack and reachvs category
Average stack and reachvs category

Geometry

S
M
M-L
L
XL
Stack
537mm
563mm
586mm
607mm
631mm
Reach
386mm
388mm
395mm
403mm
416mm
Stack to Reach Ratio
1.39:1
1.45:1
1.48:1
1.51:1
1.52:1
Seat Tube Length, C-T
445mm
460mm
490mm
520mm
550mm
Top Tube Length, Effective/Horizontal Unknown
545mm
560mm
575mm
595mm
615mm
Top Tube Slope
12.2deg
13.3deg
12.3deg
11.2deg
10.4deg
Head Tube Angle
71.5deg
72deg
72deg
72.5deg
72.5deg
Seat Tube Angle
73.3deg
73deg
73deg
72.5deg
72.5deg
Head Tube Length
130mm
155mm
180mm
200mm
225mm
Bottom Bracket Drop
70mm
70mm
70mm
70mm
70mm
Bottom Bracket Height
273mm
273mm
273mm
273mm
273mm
Chainstay Length
425mm
425mm
425mm
425mm
425mm
Chainstay Length Horizontal
419.2mm
419.2mm
419.2mm
419.2mm
419.2mm
Front-Center
598.9mm
604.9mm
619.8mm
629.7mm
649.6mm
Front-Center Horizontal
594.8mm
600.8mm
615.8mm
625.8mm
645.8mm
Wheelbase
1014mm
1020mm
1035mm
1045mm
1065mm
Fork Offset/Rake
50mm
50mm
50mm
50mm
50mm
Trail
62mm
mid/​neutral
58.9mm
mid/​neutral
58.9mm
mid/​neutral
55.7mm
mid/​neutral
55.7mm
mid/​neutral
Mechanical Trail
58.8mm
56mm
56mm
53.1mm
53.1mm
Wheel Flop
18.7mm
17.3mm
17.3mm
16mm
16mm
Standover Height
697mm
719mm
741mm
767mm
795mm
Tire to Pedal Spindle
85.9mm
170 mm cranks
91.9mm
170 mm cranks
106.8mm
170 mm cranks
111.7mm
175 mm cranks
131.6mm
175 mm cranks
Pedal Spindle to Ground Clearance
103mm
170 mm cranks
103mm
170 mm cranks
103mm
170 mm cranks
98mm
175 mm cranks
98mm
175 mm cranks

SL 1 Build

S
M
M-L
L
XL
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
Tire Width
32mm
32mm
32mm
32mm
32mm
Tire Width Max
32mm
32mm
32mm
32mm
32mm
Tire Outer Diameter
686mm
686mm
686mm
686mm
686mm
Bike Length with Tires
1700mm
1706mm
1721mm
1731mm
1751mm
Crank Length
170mm
170mm
170mm
175mm
175mm
Handlebar Width
580mm
620mm
620mm
620mm
620mm
Stem Length
90mm
100mm
100mm
110mm
110mm

Published Sizing Recommendations

Height
5 ft 5 in
to
5 ft 8 in
5 ft 8 in
to
6 ft 0 in
5 ft 11 in
to
6 ft 1 in
6 ft 1 in
to
6 ft 3 in
6 ft 4 in
to
6 ft 5 in
PBH
27 in
to
32 in
30 in
to
34 in
30 in
to
34 in
31 in
to
36 in
33 in
to
37 in

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
Fitness
Source:https://www.giant-bicycles.com/gb/fastroad-sl-1-2021