2022 Diamondback Bicycles Union 1

	MD 5'7" - 5'10"	SM 5'4" -5'7"	LG 5'10" - 6'1"	XL 6'1"-6'4"
Stack	612mm	612mm	623mm	642mm
Reach	408mm	408mm	419mm	429mm
Stack to Reach Ratio	1.5:1	1.5:1	1.49:1	1.5:1
Seat Tube Length, C-T	430mm	380mm	480mm	530mm
Top Tube Length, Effective/Horizontal Center	595mm	595mm	610mm	625mm
Top Tube Slope	20.6deg	25.6deg	16.3deg	13deg
Head Tube Angle	70deg	70deg	70.5deg	70.5deg
Seat Tube Angle	73deg	73deg	73deg	73deg
Head Tube Length	160mm	160mm	170mm	190mm
Bottom Bracket Drop	65mm	65mm	65mm	65mm
Bottom Bracket Height	288mm	288mm	288mm	288mm
Chainstay Length	470mm	470mm	470mm	470mm
Chainstay Length Horizontal	465.5mm	465.5mm	465.5mm	465.5mm
Front-Center	662.7mm	662.7mm	672.7mm	688.6mm
Front-Center Horizontal	659.5mm	659.5mm	669.5mm	685.5mm
Wheelbase	1125mm	1125mm	1135mm	1151mm
Fork Offset/Rake	50mm	50mm	50mm	50mm
Fork Length, Unknown	440mm	440mm	440mm	440mm
Trail	75.3mm high	75.3mm high	72mm high	72mm high
Mechanical Trail	70.7mm	70.7mm	67.8mm	67.8mm
Wheel Flop	24.2mm	24.2mm	22.6mm	22.6mm
Standover Height	750mm	728mm	786mm	820mm
Tire to Pedal Spindle	139.8mm 170 mm cranks	139.8mm 170 mm cranks	149.7mm 170 mm cranks	165.6mm 170 mm cranks
Pedal Spindle to Ground Clearance	118mm 170 mm cranks	118mm 170 mm cranks	118mm 170 mm cranks	118mm 170 mm cranks

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.

Category Trend

Source:https://www.diamondback.com/bikes/road-gravel-bikes/ebike/union-1-4664

Geometry