2020 All-City Cycles Thunderdome Base

	46cm	49cm	52cm	55cm	58cm	61cm
Stack	493mm	509mm	528mm	547mm	571mm	595mm
Reach	378mm	384mm	394mm	403mm	417mm	430mm
Stack to Reach Ratio	1.3:1	1.33:1	1.34:1	1.36:1	1.37:1	1.38:1
Seat Tube Length, C-TTT	460mm	490mm	520mm	550mm	580mm	610mm
Top Tube Length, Effective/Horizontal HT Top	510mm	520mm	540mm	555mm	575mm	595mm
Top Tube Slope	3.4deg	1.8deg	0.8deg	-0.2deg	-0.7deg	-1.2deg
Head Tube Angle	72deg	72.5deg	72.5deg	72.5deg	72.5deg	72.5deg
Seat Tube Angle	75deg	75deg	74.5deg	74.5deg	74.5deg	74.5deg
Head Tube Length	110mm	125mm	145mm	165mm	190mm	215mm
Bottom Bracket Drop	53mm	53mm	53mm	53mm	53mm	53mm
Bottom Bracket Height	283mm	283mm	283mm	283mm	283mm	283mm
Chainstay Length	396mm	396mm	396mm	396mm	396mm	396mm
Chainstay Length Horizontal	392.4mm	392.4mm	392.4mm	392.4mm	392.4mm	392.4mm
Front-Center	571mm	577mm	592.9mm	613.9mm	634.8mm	655.7mm
Front-Center Horizontal	568.6mm	574.6mm	590.6mm	611.6mm	632.6mm	653.6mm
Wheelbase	961mm	967mm	983mm	1004mm	1025mm	1046mm
Fork Offset/Rake	45mm	45mm	45mm	45mm	45mm	45mm
Fork Length (Axle-To-Crown)	367mm	367mm	367mm	367mm	367mm	367mm
Trail	61.9mm mid/neutral	58.8mm mid/neutral	58.8mm mid/neutral	58.8mm mid/neutral	58.8mm mid/neutral	58.8mm mid/neutral
Mechanical Trail	58.8mm	56mm	56mm	56mm	56mm	56mm
Wheel Flop	18.2mm	16.9mm	16.9mm	16.9mm	16.9mm	16.9mm
Standover Height	740mm	765mm	789mm	815mm	841mm	869mm
Tire to Pedal Spindle	70mm 165 mm cranks	76mm 165 mm cranks	91.9mm 165 mm cranks	112.9mm 165 mm cranks	133.8mm 165 mm cranks	154.7mm 165 mm cranks
Pedal Spindle to Ground Clearance	118mm 165 mm cranks	118mm 165 mm cranks	118mm 165 mm cranks	118mm 165 mm cranks	118mm 165 mm cranks	118mm 165 mm cranks

	46cm	49cm	52cm	55cm	58cm	61cm
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	25mm	25mm	25mm	25mm	25mm	25mm
Tire Width Max	25mm	25mm	25mm	25mm	25mm	25mm
Tire Outer Diameter	672mm	672mm	672mm	672mm	672mm	672mm
Bike Length with Tires	1633mm	1639mm	1655mm	1676mm	1697mm	1718mm
Crank Length	165mm	165mm	165mm	165mm	165mm	165mm
Handlebar Width	380mm	400mm	420mm	420mm	440mm	440mm
Stem Length	90mm	90mm	100mm	100mm	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

Track/Fixed-gear

Source:https://allcitycycles.com/bikes/thunderdome

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2020 All-City Cycles Thunderdome Base

Geometry

Base Build

Stack and Reach vs. Category Trend