2025 Ritchey Design Ascent Base

	S	M	L	XL
Stack	572mm	589mm	607mm	628mm
Reach	370mm	381mm	388mm	397mm
Stack to Reach Ratio	1.55:1	1.55:1	1.56:1	1.58:1
Seat Tube Length, C-T	430mm	465mm	500mm	535mm
Top Tube Length, Effective/Horizontal Unknown	541mm	556mm	575mm	590mm
Top Tube Slope	18deg	15.6deg	13.6deg	11.9deg
Head Tube Angle	70deg	70.5deg	70.5deg	71deg
Seat Tube Angle	73.5deg	73.5deg	73deg	73deg
Head Tube Length	115mm	130mm	150mm	170mm
Bottom Bracket Drop	68mm	68mm	68mm	68mm
Bottom Bracket Height	309mm	309mm	309mm	309mm
Chainstay Length	463mm	463mm	463mm	463mm
Chainstay Length Horizontal	458mm	458mm	458mm	458mm
Front-Center	612.8mm	623.7mm	637.7mm	648.6mm
Front-Center Horizontal	609mm	620mm	634mm	645mm
Wheelbase	1067mm	1078mm	1092mm	1103mm
Fork Offset/Rake	52mm	52mm	52mm	52mm
Fork Length (Axle-To-Crown)	435mm	435mm	435mm	435mm
Trail	81.9mm very high	78.4mm high	78.4mm high	74.8mm high
Mechanical Trail	77mm	73.9mm	73.9mm	70.8mm
Wheel Flop	26.3mm	24.7mm	24.7mm	23mm
Tire to Pedal Spindle	65.8mm 170 mm cranks	76.7mm 170 mm cranks	90.6mm 170 mm cranks	101.6mm 170 mm cranks
Pedal Spindle to Ground Clearance	139mm 170 mm cranks	139mm 170 mm cranks	139mm 170 mm cranks	139mm 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://ritcheylogic.com/bike/frames/ascent-frameset

Geometry