2021 MASH Alleycat AC-3

	50cm	52cm	54cm	56cm	58cm	61cm
Stack	492mm	504mm	521mm	542mm	557mm	585mm
Reach	387mm	395mm	405mm	415mm	431mm	448mm
Stack to Reach Ratio	1.27:1	1.28:1	1.29:1	1.31:1	1.29:1	1.31:1
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	510mm	525mm	540mm	560mm	580mm	610mm
Top Tube Slope	0.8deg	0.1deg	-0.2deg	0.1deg	-0.3deg	-0.3deg
Head Tube Angle	72.5deg	73.5deg	74.5deg	75deg	75deg	75deg
Seat Tube Angle	76deg	75.5deg	75.5deg	75deg	75deg	74.5deg
Head Tube Length	100mm	110mm	125mm	145mm	160mm	190mm
Bottom Bracket Drop	54mm	54mm	54mm	54mm	54mm	54mm
Bottom Bracket Height	287mm	287mm	287mm	287mm	287mm	287mm
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	559.2mm	562.2mm	568.2mm	579.3mm	599.3mm	623.7mm
Front-Center Horizontal	556.6mm	559.6mm	565.6mm	576.8mm	596.8mm	621.3mm
Wheelbase	941.8mm	944.8mm	950.9mm	962.1mm	982.1mm	1006.6mm
Fork Offset/Rake	30mm	30mm	30mm	30mm	30mm	30mm
Fork Length, Unknown	368mm	368mm	368mm	368mm	368mm	368mm
Trail	76.1mm high	69.7mm high	63.4mm mid/neutral	60.3mm mid/neutral	60.3mm mid/neutral	60.3mm mid/neutral
Mechanical Trail	72.5mm	66.9mm	61.1mm	58.3mm	58.3mm	58.3mm
Wheel Flop	21.8mm	19mm	16.3mm	15.1mm	15.1mm	15.1mm
Standover Height	777mm	789mm	806mm	827mm	842mm	870mm
Tire to Pedal Spindle	48.2mm 170 mm cranks	51.2mm 170 mm cranks	57.2mm 170 mm cranks	68.3mm 170 mm cranks	88.3mm 170 mm cranks	112.7mm 170 mm cranks
Pedal Spindle to Ground Clearance	117mm 170 mm cranks	117mm 170 mm cranks	117mm 170 mm cranks	117mm 170 mm cranks	117mm 170 mm cranks	117mm 170 mm cranks

	50cm	52cm	54cm	56cm	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	30mm	30mm	30mm	30mm	30mm	30mm
Tire Width Max	30mm	30mm	30mm	30mm	30mm	30mm
Tire Outer Diameter	682mm	682mm	682mm	682mm	682mm	682mm
Bike Length with Tires	1623.8mm	1626.8mm	1632.9mm	1644.1mm	1664.1mm	1688.6mm

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://shop.mashsf.com/mash-ac-3-frameset-scopes.html

Suggest Bike Edit

2021 MASH Alleycat AC-3

Geometry

AC-3 Build

Stack and Reach vs. Category Trend