2019 Viathon Bicycles R.1 Base

	520	540	560	575	590
Stack	527mm	550mm	569mm	584mm	612mm
Reach	380mm	386mm	391mm	397mm	408mm
Stack to Reach Ratio	1.39:1	1.42:1	1.46:1	1.47:1	1.5:1
Seat Tube Length, C-T	520mm	540mm	560mm	575mm	590mm
Top Tube Length, Effective/Horizontal HT Top	534mm	550mm	565mm	576mm	602mm
Top Tube Slope	3deg	3.4deg	3.5deg	3.5deg	4.8deg
Head Tube Angle	72deg	72.8deg	73.2deg	73.7deg	74deg
Seat Tube Angle	73.7deg	73.4deg	73deg	73deg	72.4deg
Head Tube Length	124mm	146mm	164mm	178mm	211mm
Bottom Bracket Drop	72mm	72mm	72mm	72mm	67mm
Bottom Bracket Height	264mm	264mm	264mm	264mm	269mm
Chainstay Length	406mm	406mm	408mm	408mm	408mm
Chainstay Length Horizontal	399.6mm	399.6mm	401.6mm	401.6mm	402.5mm
Front-Center	578mm	583mm	590mm	596mm	613mm
Front-Center Horizontal	573.4mm	579.4mm	586.4mm	591.4mm	609.5mm
Wheelbase	973mm	979mm	988mm	993mm	1012mm
Fork Offset/Rake	43mm	43mm	43mm	43mm	43mm
Fork Length, Unknown	367mm	367mm	367mm	367mm	367mm
Trail	64mm mid/neutral	59mm mid/neutral	56.5mm mid/neutral	53.5mm mid/neutral	51.6mm mid/neutral
Mechanical Trail	60.8mm	56.4mm	54.1mm	51.3mm	49.6mm
Wheel Flop	18.8mm	16.7mm	15.6mm	14.4mm	13.7mm
Tire to Pedal Spindle	72mm 170 mm cranks	77mm 170 mm cranks	84mm 170 mm cranks	90mm 170 mm cranks	107mm 170 mm cranks
Pedal Spindle to Ground Clearance	94mm 170 mm cranks	94mm 170 mm cranks	94mm 170 mm cranks	94mm 170 mm cranks	99mm 170 mm cranks

Published Sizing Recommendations

Height

158 cm

170 cm

168 cm

177 cm

175 cm

185 cm

183 cm

190 cm

188 cm

198 cm

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://www.viathonbicycles.com/products/road-bike-r1-105