2025 4BRO BIKES Gravel Bike Steel

	S*	S	M	L	XL
Stack	569mm	569mm	587mm	606mm	625mm
Reach	390mm	390mm	414mm	438mm	45mm
Stack to Reach Ratio	1.46:1	1.46:1	1.42:1	1.38:1	13.89:1
Seat Tube Length, Unknown	450mm	450mm	480mm	510mm	540mm
Top Tube Length, Effective/Horizontal Unknown	535mm	535mm	565mm	595mm	615mm
Top Tube Slope	14.9deg	14.9deg	13deg	11.3deg	28.7deg
Head Tube Angle	70deg	70deg	70deg	70deg	70deg
Seat Tube Angle	74deg	74deg	74deg	74deg	74deg
Effective Seat Tube Angle, Seat Tube Top	77deg	—	—	—	—
Head Tube Length	150mm	150mm	170mm	190mm	210mm
Bottom Bracket Drop	72mm	72mm	72mm	72mm	72mm
Bottom Bracket Height	272mm	291mm	291mm	291mm	291mm
Chainstay Length	430mm	430mm	430mm	430mm	430mm
Chainstay Length Horizontal	423.9mm	423.9mm	423.9mm	423.9mm	423.9mm
Front-Center	624mm	624mm	655mm	687mm	708mm
Front-Center Horizontal	620.1mm	620.1mm	651.1mm	683.1mm	704.1mm
Wheelbase	1044mm	1044mm	1075mm	1107mm	1128mm
Fork Offset/Rake	50mm	50mm	50mm	50mm	50mm
Fork Length, Unknown	400mm	400mm	400mm	400mm	400mm
Trail	72mm high	78.9mm high	78.9mm high	78.9mm high	78.9mm high
Mechanical Trail	67.7mm	74.2mm	74.2mm	74.2mm	74.2mm
Wheel Flop	23.1mm	25.4mm	25.4mm	25.4mm	25.4mm
Standover Height	757mm	775mm	800mm	824mm	847mm
Tire to Pedal Spindle	115mm 165 mm cranks	91mm 170 mm cranks	122mm 170 mm cranks	149mm 175 mm cranks	170mm 175 mm cranks
Pedal Spindle to Ground Clearance	107mm 165 mm cranks	121mm 170 mm cranks	121mm 170 mm cranks	116mm 175 mm cranks	116mm 175 mm cranks

Published Sizing Recommendations

Height

5 ft 4 in

5 ft 7 in

5 ft 6 in

5 ft 9 in

5 ft 8 in

5 ft 11 in

6 ft 2 in

6 ft 5 in

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.

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Source:https://4brobikes.vn/