2021 All-City Cycles Big Block Base

Design
Flat Bar, Rigid, non-suspension corrected
Frame
Steel
Fork
Steel
Features
Rim brake, Single-speed capable
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category
Average stack and reachvs category

Geometry

46cm
49cm
52cm
55cm
58cm
61cm
Stack
509mm
525mm
546mm
567mm
591mm
616mm
Reach
382mm
393mm
398mm
408mm
421mm
434mm
Stack to Reach Ratio
1.33:1
1.34:1
1.37:1
1.39:1
1.4:1
1.42:1
Seat Tube Length, C-TTT
460mm
490mm
520mm
550mm
580mm
610mm
Top Tube Length, Effective/Horizontal HT Top
520mm
535mm
550mm
565mm
585mm
605mm
Top Tube Slope
5.1deg
3.5deg
2.7deg
1.8deg
1.3deg
0.9deg
Head Tube Angle
73deg
73.5deg
74deg
74.5deg
74.5deg
75deg
Seat Tube Angle
75deg
75deg
74.5deg
74.5deg
74.5deg
74.5deg
Head Tube Length
95mm
110mm
130mm
150mm
175mm
200mm
Bottom Bracket Drop
58mm
58mm
58mm
58mm
58mm
58mm
Bottom Bracket Height
285mm
285mm
285mm
285mm
285mm
285mm
Chainstay Length
396mm
396mm
396mm
396mm
396mm
396mm
Chainstay Length Horizontal
391.7mm
391.7mm
391.7mm
391.7mm
391.7mm
391.7mm
Front-Center
556.3mm
568.2mm
574.2mm
585.2mm
605.1mm
620mm
Front-Center Horizontal
553.3mm
565.3mm
571.3mm
582.3mm
602.3mm
617.3mm
Wheelbase
945mm
957mm
963mm
974mm
994mm
1009mm
Fork Offset/Rake
32mm
32mm
32mm
32mm
32mm
32mm
Fork Length (Axle-To-Crown)
375mm
375mm
375mm
375mm
375mm
375mm
Trail
71.4mm
high
68.2mm
high
65.1mm
high
61.9mm
mid/​neutral
61.9mm
mid/​neutral
58.8mm
mid/​neutral
Mechanical Trail
68.3mm
65.4mm
62.5mm
59.7mm
59.7mm
56.8mm
Wheel Flop
20mm
18.6mm
17.2mm
15.9mm
15.9mm
14.7mm
Standover Height
743mm
767mm
793mm
821mm
846mm
874mm
Tire to Pedal Spindle
48.3mm
165 mm cranks
60.2mm
165 mm cranks
66.2mm
165 mm cranks
77.2mm
165 mm cranks
97.1mm
165 mm cranks
112mm
165 mm cranks
Pedal Spindle to Ground Clearance
120mm
165 mm cranks
120mm
165 mm cranks
120mm
165 mm cranks
120mm
165 mm cranks
120mm
165 mm cranks
120mm
165 mm cranks

Base Build

46cm
49cm
52cm
55cm
58cm
61cm
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
32mm
32mm
32mm
32mm
32mm
32mm
Tire Width Max
32mm
32mm
32mm
32mm
32mm
32mm
Tire Outer Diameter
686mm
686mm
686mm
686mm
686mm
686mm
Bike Length with Tires
1631mm
1643mm
1649mm
1660mm
1680mm
1695mm
Crank Length
165mm
165mm
165mm
165mm
165mm
165mm
Handlebar Width
720mm
720mm
720mm
720mm
720mm
720mm
Stem Length
80mm
90mm
100mm
100mm
110mm
110mm

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
Track/Fixed-gear
Source:https://allcitycycles.com/bikes/big_block