Name: 2025 Ritchey Design Ascent Base
Brand: Ritchey Design

	Large	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	— 170 mm cranks	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	— 170 mm cranks	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.

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Source:Www.ritcheylogic.com, ritcheylogic.com

2025 Ritchey Design Ascent Base

Geometry