2025 J Guillem 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-T	490mm	510mm	530mm	550mm	570mm
Top Tube Length, Effective/Horizontal Center	535mm	550mm	565mm	590mm	600mm
Top Tube Slope	7.4deg	7.7deg	8.4deg	8deg	8deg
Head Tube Angle	70deg	71deg	72deg	72deg	72.5deg
Seat Tube Angle	74deg	73.5deg	73.5deg	73.5deg	73deg
Head Tube Length	130mm	150mm	175mm	195mm	215mm
Bottom Bracket Drop	70mm	70mm	70mm	70mm	70mm
Bottom Bracket Height	291mm	291mm	291mm	291mm	291mm
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	77.9mm high	71.2mm high	65.8mm high	65mm mid/neutral	56.3mm mid/neutral
Mechanical Trail	73.2mm	67.3mm	62.6mm	61.8mm	53.7mm
Wheel Flop	25.1mm	21.9mm	19.3mm	19.1mm	16.2mm
Standover Height	763mm	783mm	806mm	825mm	847mm
Tire to Pedal Spindle	77mm 170 mm cranks	78mm 170 mm cranks	85mm 170 mm cranks	110mm 170 mm cranks	115mm 170 mm cranks
Pedal Spindle to Ground Clearance	121mm 170 mm cranks	121mm 170 mm cranks	121mm 170 mm cranks	121mm 170 mm cranks	121mm 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