2021 Jamis Bicycles Beatnik Base

	48	51	54	56	58	61
Stack	527mm	538mm	553mm	569mm	592mm	623mm
Reach	389mm	391mm	391mm	390mm	397mm	394mm
Stack to Reach Ratio	1.35:1	1.38:1	1.41:1	1.46:1	1.49:1	1.58:1
Seat Tube Length, Unknown	480mm	510mm	540mm	560mm	580mm	610mm
Top Tube Length, Effective/Horizontal Center	525mm	540mm	555mm	564mm	578mm	596mm
Top Tube Slope	7deg	5deg	3.7deg	3.5deg	3.8deg	4.2deg
Head Tube Angle	71.5deg	72deg	72deg	72.5deg	73.5deg	74deg
Seat Tube Angle	75.5deg	74.5deg	73.5deg	73deg	73deg	72deg
Head Tube Length	95mm	105mm	120mm	135mm	155mm	185mm
Bottom Bracket Drop	65mm	65mm	65mm	65mm	65mm	65mm
Bottom Bracket Height	278mm	278mm	278mm	278mm	278mm	278mm
Chainstay Length	421mm	421mm	421mm	421mm	421mm	421mm
Chainstay Length Horizontal	416mm	416mm	416mm	416mm	416mm	416mm
Front-Center	592.6mm	595.6mm	595.6mm	594.6mm	598.6mm	598.6mm
Front-Center Horizontal	589.1mm	592.1mm	592.1mm	591.1mm	595.1mm	595.1mm
Wheelbase	1005mm	1008mm	1008mm	1007mm	1011mm	1011mm
Fork Offset/Rake	45mm	45mm	40mm	40mm	40mm	40mm
Trail	67.3mm high	64.1mm mid/neutral	69.4mm high	66.2mm high	59.9mm mid/neutral	56.7mm mid/neutral
Mechanical Trail	63.8mm	61mm	66mm	63.1mm	57.4mm	54.5mm
Wheel Flop	20.3mm	18.9mm	20.4mm	19mm	16.3mm	15mm
Standover Height	774mm	791mm	813mm	830mm	859mm	879mm
Tire to Pedal Spindle	79.6mm 170 mm cranks	82.6mm 170 mm cranks	82.6mm 170 mm cranks	81.6mm 170 mm cranks	85.6mm 170 mm cranks	85.6mm 170 mm cranks
Pedal Spindle to Ground Clearance	108mm 170 mm cranks	108mm 170 mm cranks	108mm 170 mm cranks	108mm 170 mm cranks	108mm 170 mm cranks	108mm 170 mm cranks

	48	51	54	56	58	61
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	32mm	32mm	32mm	32mm	32mm	32mm
Tire Outer Diameter	686mm	686mm	686mm	686mm	686mm	686mm
Bike Length with Tires	1691mm	1694mm	1694mm	1693mm	1697mm	1697mm
Crank Length	170mm	170mm	170mm	170mm	170mm	170mm
Handlebar Width	540mm	540mm	540mm	540mm	540mm	540mm

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.jamisbikes.com/new_pdf/21_beatnik.pdf

Geometry