2023 Chumba Cycles Yaupon All Terrain

	SM	MD	LG	XL
Stack	628mm	646mm	656mm	674mm
Reach	393mm	406mm	423mm	438mm
Stack to Reach Ratio	1.6:1	1.59:1	1.55:1	1.54:1
Seat Tube Length, C-T	381mm	412.8mm	463.5mm	514.4mm
Top Tube Length, Effective/Horizontal Center	575mm	600mm	620mm	640mm
Top Tube Slope	27.7deg	25.6deg	20.9deg	17.2deg
Head Tube Angle	68deg	68deg	68deg	68deg
Seat Tube Angle	74deg	73.5deg	73.5deg	73.5deg
Head Tube Length	90mm	110mm	120mm	140mm
Bottom Bracket Drop	60mm	60mm	60mm	60mm
Bottom Bracket Height	308.2mm	308.2mm	308.2mm	308.2mm
Chainstay Length	440mm	440mm	440mm	440mm
Chainstay Length Max	460mm	460mm	460mm	460mm
Chainstay Length Horizontal	435.9mm	435.9mm	435.9mm	435.9mm
Chainstay Length Horizontal Max	456.1mm	456.1mm	456.1mm	456.1mm
Front-Center	672.8mm	692.7mm	713.6mm	735.6mm
Front-Center Horizontal	670.1mm	690.1mm	711.1mm	733.1mm
Wheelbase	1106mm	1126mm	1147mm	1169mm
Wheelbase Max	1125mm	1146mm	1167mm	1189mm
Fork Offset/Rake	44mm	44mm	44mm	44mm
Fork Length (Axle-To-Crown)	530mm	530mm	530mm	530mm
Trail	101.3mm very high	101.3mm very high	101.3mm very high	101.3mm very high
Mechanical Trail	93.9mm	93.9mm	93.9mm	93.9mm
Wheel Flop	35.2mm	35.2mm	35.2mm	35.2mm
Standover Height	749.3mm	772.2mm	807.7mm	848.4mm
Tire to Pedal Spindle	139.6mm 165 mm cranks	154.6mm 170 mm cranks	175.5mm 170 mm cranks	192.4mm 175 mm cranks
Pedal Spindle to Ground Clearance	143.2mm 165 mm cranks	138.2mm 170 mm cranks	138.2mm 170 mm cranks	133.2mm 175 mm cranks

Published Sizing Recommendations

Height

5 ft 2 in

5 ft 6.5 in

5 ft 7 in

5 ft 10.5 in

5 ft 11 in

6 ft 1.5 in

6 ft 2 in

6 ft 4.5 in

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://chumbausa.com/yaupon-steel-mountain-bike-29er-27plus