	48CM	50CM	52CM	54CM	56CM	58CM	60CM	62CM
Stack	524.9mm	540.9mm	555mm	569.1mm	580.5mm	589.9mm	608.9mm	634.7mm
Reach	364.1mm	363.7mm	374.7mm	378.7mm	383.5mm	398mm	402.7mm	400.7mm
Stack to Reach Ratio	1.44:1	1.49:1	1.48:1	1.5:1	1.51:1	1.48:1	1.51:1	1.58:1
Seat Tube Length, C-T	480mm	500mm	520mm	540mm	560mm	580mm	600mm	620mm
Seat Tube Length, C-C	432.6mm	452.8mm	473.1mm	493.5mm	511.8mm	534.1mm	554.5mm	574.3mm
Top Tube Length, Effective/Horizontal Center	512.2mm	520.8mm	535.9mm	554mm	562.1mm	584.6mm	595.2mm	601.1mm
Top Tube Slope	7.2deg	6.9deg	6.1deg	5.6deg	4.7deg	3.7deg	3.6deg	4.2deg
Head Tube Angle	69.5deg	70deg	70deg	70.5deg	71deg	71.5deg	71.5deg	72deg
Seat Tube Angle	74.5deg	74deg	74deg	73deg	73deg	72.5deg	72.5deg	72.5deg
Head Tube Length	100mm	115mm	130mm	145mm	155mm	165mm	185mm	210mm
Bottom Bracket Drop	77mm	77mm	77mm	75mm	75mm	73mm	73mm	73mm
Bottom Bracket Height	277mm	277mm	277mm	279mm	279mm	281mm	281mm	281mm
Chainstay Length	435mm	435mm	435mm	435mm	435mm	440mm	440mm	440mm
Chainstay Length Horizontal	428.1mm	428.1mm	428.1mm	428.5mm	428.5mm	433.9mm	433.9mm	433.9mm
Front-Center	590mm	590.8mm	602mm	611.3mm	615mm	628mm	638.9mm	640mm
Front-Center Horizontal	585mm	585.8mm	593.7mm	606.7mm	610.4mm	623.1mm	634.1mm	636.1mm
Wheelbase	1013.1mm	1013.9mm	1021.8mm	1035.2mm	1038.9mm	1057mm	1068mm	1070mm
Fork Offset/Rake	50mm	50mm	50mm	50mm	50mm	50mm	50mm	50mm
Trail	79mm high	75.6mm high	75.6mm high	72.3mm high	69mm high	65.7mm high	65.7mm high	62.5mm mid/neutral
Mechanical Trail	74mm	71.1mm	71.1mm	68.2mm	65.3mm	62.3mm	62.3mm	59.4mm
Wheel Flop	25.9mm	24.3mm	24.3mm	22.8mm	21.2mm	19.8mm	19.8mm	18.4mm
Standover Height	734.8mm	761mm	777.6mm	795.3mm	810.7mm	826.4mm	845.6mm	868.1mm
Tire to Pedal Spindle	71mm 165 mm cranks	66.8mm 170 mm cranks	78mm 170 mm cranks	84.8mm 172.5 mm cranks	88.5mm 172.5 mm cranks	99mm 175 mm cranks	109.9mm 175 mm cranks	111mm 175 mm cranks
Pedal Spindle to Ground Clearance	112mm 165 mm cranks	107mm 170 mm cranks	107mm 170 mm cranks	106.5mm 172.5 mm cranks	106.5mm 172.5 mm cranks	106mm 175 mm cranks	106mm 175 mm cranks	106mm 175 mm cranks

	48CM	50CM	52CM	54CM	56CM	58CM	60CM	62CM
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	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	43mm	43mm	43mm	43mm	43mm	43mm	43mm	43mm
Tire Outer Diameter	708mm	708mm	708mm	708mm	708mm	708mm	708mm	708mm
Bike Length with Tires	1721.1mm	1721.9mm	1729.8mm	1743.2mm	1746.9mm	1765mm	1776mm	1778mm
Crank Length	165mm	170mm	170mm	172.5mm	172.5mm	175mm	175mm	175mm
Handlebar Width	40mm	42mm	42mm	44mm	44mm	46mm	46mm	46mm
Stem Length	70mm	80mm	90mm	100mm	110mm	110mm	120mm	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

All-road/Gravel

Source:masoncycles.cc

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2026 Mason Cycles Bokeh 3.5 Sram

Geometry

3.5 Sram Build

Stack and Reach vs. Category Trend