2021 MASH Alleycat AC-2

Average stack and reachvs category

Somewhat aggressive stack and reachvs category

Very aggressive stack and reachvs category

	50 X-Small	52 Small	54 Medium	56 Large	58 X-Large	61 XX-Large
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 Unknown	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	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	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 (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
Standover Height	777mm	789mm	806mm	827mm	842mm	870mm
Tire to Pedal Spindle	50.2mm 170 mm cranks	53.2mm 170 mm cranks	59.2mm 170 mm cranks	70.3mm 170 mm cranks	90.3mm 170 mm cranks	114.7mm 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

	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 Width Max	28mm	28mm	28mm	28mm	28mm	28mm
Tire Outer Diameter	678mm	678mm	678mm	678mm	678mm	678mm
Bike Length with Tires	1619.8mm	1622.8mm	1628.9mm	1640.1mm	1660.1mm	1684.6mm

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://cdn.shoplightspeed.com/shops/616120/files/22564848/mash-ac-1-frameset-gamma.jpg

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2021 MASH Alleycat AC-2

Geometry

AC-2 Build

Stack and Reach vs. Category Trend