2017 MASH Alleycat AC-1

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

Geometry

50 X-Small
52 Small
54 Medium
56 Large
58 X-Large
61 XX-Large
Stack
472.1mm
493.8mm
514.4mm
536.1mm
555.4mm
584.4mm
Reach
351.2mm
373.7mm
392.8mm
416.4mm
431.2mm
453.4mm
Stack to Reach Ratio
1.34:1
1.32:1
1.31:1
1.29:1
1.29:1
1.29:1
Seat Tube Length, C-T
500mm
520mm
540mm
560mm
580mm
610mm
Seat Tube Length, C-C
460mm
480mm
500mm
520mm
540mm
570mm
Top Tube Length, Effective/Horizontal Center
500mm
520mm
540mm
560mm
580mm
610mm
Top Tube Length, Actual C-C
500mm
520mm
540mm
560mm
580mm
610mm
Top Tube Slope
0deg
0deg
0deg
0deg
0deg
0deg
Head Tube Angle
72.5deg
73.5deg
74.5deg
75deg
75deg
75deg
Seat Tube Angle
72.5deg
73.5deg
74deg
75deg
75deg
75deg
Head Tube Length
100mm
110mm
125mm
145mm
160mm
190mm
Bottom Bracket Drop
54mm
54mm
54mm
54mm
54mm
54mm
Bottom Bracket Height
285mm
285mm
285mm
285mm
285mm
285mm
Chainstay Length
389mm
389mm
389mm
389mm
389mm
389mm
Chainstay Length Horizontal
385.2mm
385.2mm
385.2mm
385.2mm
385.2mm
385.2mm
Front-Center
517.3mm
538mm
554.3mm
579.1mm
599mm
628.9mm
Front-Center Horizontal
514.4mm
535.3mm
551.6mm
576.6mm
596.6mm
626.6mm
Wheelbase
899.7mm
920.5mm
936.9mm
961.8mm
981.8mm
1011.8mm
Fork Offset/Rake
30mm
30mm
30mm
30mm
30mm
30mm
Fork Length (On-Axis)
368mm
368mm
368mm
368mm
368mm
368mm
Trail
75.4mm
high
69.1mm
high
62.9mm
mid/​neutral
59.8mm
mid/​neutral
59.8mm
mid/​neutral
59.8mm
mid/​neutral
Mechanical Trail
71.9mm
66.3mm
60.6mm
57.7mm
57.7mm
57.7mm
Wheel Flop
21.6mm
18.8mm
16.2mm
14.9mm
14.9mm
14.9mm
Tire to Pedal Spindle
8.3mm
170 mm cranks
29mm
170 mm cranks
45.3mm
170 mm cranks
70.1mm
170 mm cranks
90mm
170 mm cranks
119.9mm
170 mm cranks
Pedal Spindle to Ground Clearance
115mm
170 mm cranks
115mm
170 mm cranks
115mm
170 mm cranks
115mm
170 mm cranks
115mm
170 mm cranks
115mm
170 mm cranks

AC-1 Build

50 X-Small
52 Small
54 Medium
56 Large
58 X-Large
61 XX-Large
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
28mm
28mm
28mm
28mm
28mm
28mm
Tire Outer Diameter
678mm
678mm
678mm
678mm
678mm
678mm
Bike Length with Tires
1577.7mm
1598.5mm
1614.9mm
1639.8mm
1659.8mm
1689.8mm

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://static.shoplightspeed.com/shops/616120/files/009240957/mash-ac-1-frameset-gamma.jpg