2025 J.Guillem Bicycles Atalaya Base

	52CM	54CM	56CM	58CM	60CM
Stack	538mm	560mm	588mm	607mm	626mm
Reach	380mm	384mm	391mm	410mm	409mm
Stack to Reach Ratio	1.42:1	1.46:1	1.5:1	1.48:1	1.53:1
Seat Tube Length, C-TTT	490mm	510mm	530mm	550mm	570mm
Seat Tube Length, C-C	445mm	465mm	485mm	505mm	525mm
Top Tube Length, Effective/Horizontal Center	535mm	550mm	565mm	590mm	600mm
Top Tube Length, Actual C-C	518mm	530mm	544mm	568mm	577mm
Top Tube Slope	9.1deg	10.8deg	11.3deg	11.4deg	11deg
Head Tube Angle	70deg	71deg	72deg	72deg	72.5deg
Seat Tube Angle	74deg	73.5deg	73.5deg	73.5deg	73deg
Head Tube Length	120mm	140mm	165mm	185mm	205mm
Bottom Bracket Drop	70mm	70mm	70mm	70mm	70mm
Bottom Bracket Height	286mm	286mm	286mm	286mm	286mm
Chainstay Length	425mm	425mm	425mm	425mm	425mm
Chainstay Length Horizontal	419.2mm	419.2mm	419.2mm	419.2mm	419.2mm
Front-Center	608mm	609mm	616mm	641mm	646mm
Front-Center Horizontal	603.8mm	605.8mm	610.8mm	636.8mm	641.8mm
Wheelbase	1023mm	1025mm	1030mm	1056mm	1061mm
Fork Offset/Rake	50.2mm	50.2mm	49mm	49.8mm	54.8mm
Trail	76.1mm high	69.5mm high	64.2mm mid/neutral	63.4mm mid/neutral	54.8mm mid/neutral
Mechanical Trail	71.5mm	65.7mm	61mm	60.3mm	52.2mm
Wheel Flop	24.5mm	21.4mm	18.9mm	18.6mm	15.7mm
Standover Height	763mm	783mm	806mm	825mm	847mm
Tire to Pedal Spindle	82mm 170 mm cranks	83mm 170 mm cranks	90mm 170 mm cranks	115mm 170 mm cranks	120mm 170 mm cranks
Pedal Spindle to Ground Clearance	116mm 170 mm cranks	116mm 170 mm cranks	116mm 170 mm cranks	116mm 170 mm cranks	116mm 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://jguillem.com/bike/atalaya-gravel

Geometry