2018 Crust Bikes Bombora Base

	XS	S	M	L	XL	XXL
Stack	540mm	553mm	576mm	599mm	628mm	660mm
Reach	365mm	378mm	382mm	395mm	406mm	416mm
Stack to Reach Ratio	1.48:1	1.46:1	1.51:1	1.52:1	1.55:1	1.59:1
Seat Tube Length, C-T	456mm	502mm	543mm	574mm	629mm	670mm
Seat Tube Length, C-C	408mm	455mm	494mm	529mm	581mm	622mm
Top Tube Length, Effective/Horizontal Center	520mm	540mm	560mm	580mm	600mm	620mm
Top Tube Length, Actual C-C	502mm	525mm	545mm	569mm	594mm	616mm
Top Tube Slope	11.5deg	7.4deg	5.7deg	4.3deg	2.1deg	1.2deg
Head Tube Angle	69.5deg	70deg	71deg	71deg	71deg	71deg
Seat Tube Angle	74.5deg	74deg	73deg	73deg	73deg	73deg
Head Tube Length	121mm	132mm	153mm	177mm	208mm	241mm
Bottom Bracket Drop	64mm	64mm	64mm	64mm	64mm	64mm
Bottom Bracket Height	286.4mm	286.4mm	286.4mm	286.4mm	286.4mm	286.4mm
Chainstay Length	425mm	425mm	425mm	425mm	425mm	425mm
Chainstay Length Horizontal	420.2mm	420.2mm	420.2mm	420.2mm	420.2mm	420.2mm
Front-Center	591.3mm	603.3mm	606.2mm	626.1mm	647mm	667.9mm
Front-Center Horizontal	587.9mm	599.9mm	602.9mm	622.9mm	643.9mm	664.9mm
Wheelbase	1008mm	1020mm	1023mm	1043mm	1064mm	1085mm
Fork Offset/Rake	48mm	48mm	48mm	48mm	48mm	48mm
Trail	79.8mm high	76.5mm high	69.9mm high	69.9mm high	69.9mm high	69.9mm high
Mechanical Trail	74.7mm	71.9mm	66.1mm	66.1mm	66.1mm	66.1mm
Wheel Flop	26.2mm	24.6mm	21.5mm	21.5mm	21.5mm	21.5mm
Standover Height	747mm	775mm	804mm	832mm	872mm	907mm
Tire to Pedal Spindle	70.9mm 170 mm cranks	82.8mm 170 mm cranks	85.8mm 170 mm cranks	105.7mm 170 mm cranks	126.6mm 170 mm cranks	147.5mm 170 mm cranks
Pedal Spindle to Ground Clearance	116.4mm 170 mm cranks	116.4mm 170 mm cranks	116.4mm 170 mm cranks	116.4mm 170 mm cranks	116.4mm 170 mm cranks	116.4mm 170 mm cranks

	XS	S	M	L	XL	XXL
Wheel Size	650B/27.5 in 584 mm BSD	650B/27.5 in 584 mm BSD	650B/27.5 in 584 mm BSD	650B/27.5 in 584 mm BSD	650B/27.5 in 584 mm BSD	650B/27.5 in 584 mm BSD
Tire Width	2.3in	2.3in	2.3in	2.3in	2.3in	2.3in
Tire Width Max	2.3in	2.3in	2.3in	2.3in	2.3in	2.3in
Tire Outer Diameter	700.8mm	700.8mm	700.8mm	700.8mm	700.8mm	700.8mm
Bike Length with Tires	1708.8mm	1720.8mm	1723.8mm	1743.8mm	1764.8mm	1785.8mm

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:https://crustbikes.com/products/bombora/

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2018 Crust Bikes Bombora Base

Geometry

Base Build

Stack and Reach vs. Category Trend