2021 Mason Cycles Aspect Ultegra DI2 Hydro

	50CM	52CM	54CM	56CM	58CM	60CM
Stack	552.8mm	567mm	579.7mm	594mm	605.4mm	613.4mm
Reach	377.5mm	377.8mm	378.2mm	385.5mm	390mm	392.2mm
Stack to Reach Ratio	1.46:1	1.5:1	1.53:1	1.54:1	1.55:1	1.56:1
Seat Tube Length, C-T	500mm	520mm	540mm	560mm	580mm	600mm
Seat Tube Length, C-C	452.6mm	472.8mm	493.2mm	513.4mm	533.8mm	554.1mm
Top Tube Length, Effective/Horizontal Center	532.6mm	536.8mm	551.2mm	560.7mm	581.2mm	585.9mm
Top Tube Length, Actual C-C	516mm	520.8mm	534.2mm	544.5mm	564.7mm	571.8mm
Top Tube Slope	9.6deg	8.8deg	8.1deg	7.4deg	6.5deg	5.3deg
Head Tube Angle	71.5deg	71.5deg	71.5deg	71.5deg	72deg	72deg
Seat Tube Angle	74.5deg	74.5deg	73.5deg	73.5deg	72.5deg	72.5deg
Head Tube Length	140mm	155mm	170mm	185mm	195mm	205mm
Bottom Bracket Drop	73mm	73mm	71.5mm	71.5mm	71.5mm	70mm
Bottom Bracket Height	268mm	268mm	269.5mm	269.5mm	269.5mm	271mm
Chainstay Length	425mm	425mm	425mm	425mm	425mm	425mm
Chainstay Length Horizontal	418.7mm	418.7mm	418.9mm	418.9mm	418.9mm	419.2mm
Front-Center	590mm	595mm	600mm	610mm	615mm	620mm
Front-Center Horizontal	585.5mm	590.5mm	595.8mm	605.8mm	610.8mm	616mm
Wheelbase	1004.2mm	1009.2mm	1014.7mm	1024.7mm	1029.7mm	1035.2mm
Fork Offset/Rake	45mm	45mm	45mm	45mm	45mm	45mm
Fork Length (On-Axis)	380mm	380mm	380mm	380mm	380mm	380mm
Trail	66.6mm high	66.6mm high	66.6mm high	66.6mm high	63.5mm mid/neutral	63.5mm mid/neutral
Mechanical Trail	63.2mm	63.2mm	63.2mm	63.2mm	60.4mm	60.4mm
Wheel Flop	20.1mm	20.1mm	20.1mm	20.1mm	18.7mm	18.7mm
Standover Height	758.9mm	775.7mm	792.1mm	808.8mm	822.9mm	837.9mm
Tire to Pedal Spindle	79mm 170 mm cranks	84mm 170 mm cranks	86.5mm 172.5 mm cranks	96.5mm 172.5 mm cranks	99mm 175 mm cranks	104mm 175 mm cranks
Pedal Spindle to Ground Clearance	98mm 170 mm cranks	98mm 170 mm cranks	97mm 172.5 mm cranks	97mm 172.5 mm cranks	94.5mm 175 mm cranks	96mm 175 mm cranks

	50CM	52CM	54CM	56CM	58CM	60CM
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	35mm	35mm	35mm	35mm	35mm	35mm
Tire Outer Diameter	682mm	682mm	682mm	682mm	682mm	682mm
Bike Length with Tires	1686.2mm	1691.2mm	1696.7mm	1706.7mm	1711.7mm	1717.2mm
Crank Length	170mm	170mm	172.5mm	172.5mm	175mm	175mm
Handlebar Width	42cm	42cm	44cm	44cm	46cm	46cm
Stem Length	90mm	90mm	100mm	110mm	110mm	120mm

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

Endurance Road

Source:https://masoncycles.cc/products/aspect-dura-ace-di2-hydro

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2021 Mason Cycles Aspect Ultegra DI2 Hydro

Geometry

Ultegra DI2 Hydro Build

Stack and Reach vs. Category Trend