2025 Yishunbike G1055 Base

	490/XS	520/S	540/M	560/L	580/XL
Stack	537.7mm	556.6mm	568mm	588.9mm	605.9mm
Reach	375mm	375.4mm	376.2mm	380mm	384mm
Stack to Reach Ratio	1.43:1	1.48:1	1.51:1	1.55:1	1.58:1
Seat Tube Length, C-T	490mm	520mm	540mm	560mm	580mm
Top Tube Length, Effective/Horizontal Center	525mm	535.3mm	545mm	560.4mm	575mm
Top Tube Slope	7.4deg	6.2deg	5.5deg	5.6deg	5.4deg
Head Tube Angle	70.5deg	71deg	71.5deg	72deg	72deg
Seat Tube Angle	74.5deg	74deg	73deg	73deg	72.5deg
Head Tube Length	120mm	140mm	150mm	170mm	190mm
Bottom Bracket Drop	67mm	67mm	67mm	67mm	67mm
Bottom Bracket Height	294mm	294mm	294mm	294mm	294mm
Chainstay Length	435mm	435mm	435mm	435mm	435mm
Chainstay Length Horizontal	429.8mm	429.8mm	429.8mm	429.8mm	429.8mm
Front-Center	599.5mm	600.4mm	601.6mm	605.6mm	615.2mm
Front-Center Horizontal	595.7mm	596.7mm	597.9mm	601.9mm	611.5mm
Wheelbase	1025.5mm	1026.5mm	1027.7mm	1031.7mm	1041.3mm
Fork Offset/Rake	50.9mm	49.8mm	51.3mm	49.8mm	49.8mm
Fork Length (On-Axis)	395mm	395mm	395mm	395mm	395mm
Trail	73.8mm high	71.6mm high	66.7mm high	65mm mid/neutral	64.9mm mid/neutral
Mechanical Trail	69.6mm	67.7mm	63.3mm	61.8mm	61.7mm
Wheel Flop	23.2mm	22mm	20.1mm	19.1mm	19.1mm
Tire to Pedal Spindle	68.5mm 170 mm cranks	69.4mm 170 mm cranks	70.6mm 170 mm cranks	74.6mm 170 mm cranks	84.2mm 170 mm cranks
Pedal Spindle to Ground Clearance	124mm 170 mm cranks	124mm 170 mm cranks	124mm 170 mm cranks	124mm 170 mm cranks	124mm 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.yishunbike.com/frames/gravel/g1055

Geometry