2021 Author Ronin SL

	500	520	540	560	580
Stack	548mm	569mm	587mm	607mm	628mm
Reach	378mm	382mm	386mm	395mm	397mm
Stack to Reach Ratio	1.45:1	1.49:1	1.52:1	1.54:1	1.58:1
Seat Tube Length, C-T	500mm	520mm	540mm	560mm	580mm
Seat Tube Length, C-C	460mm	480mm	500mm	520mm	540mm
Top Tube Length, Effective/Horizontal HT Top	530mm	545mm	560mm	580mm	595mm
Top Tube Length, Actual C-C	517mm	530mm	544mm	562mm	575mm
Top Tube Slope	7.4deg	7.5deg	7.3deg	7.3deg	7.5deg
Head Tube Angle	70.5deg	71deg	71deg	71.5deg	72deg
Seat Tube Angle	74.5deg	74deg	73.5deg	73deg	72.5deg
Head Tube Length	120mm	140mm	160mm	180mm	200mm
Bottom Bracket Drop	70mm	70mm	69mm	68mm	68mm
Bottom Bracket Height	279mm	279mm	280mm	281mm	281mm
Chainstay Length	425mm	425mm	425mm	425mm	425mm
Chainstay Length Horizontal	419.2mm	419.2mm	419.4mm	419.5mm	419.5mm
Front-Center	604.9mm	610.8mm	621.5mm	631.2mm	635.1mm
Front-Center Horizontal	600.8mm	606.8mm	617.6mm	627.5mm	631.5mm
Wheelbase	1020mm	1026mm	1037mm	1047mm	1051mm
Fork Offset/Rake	50mm	50mm	50mm	50mm	50mm
Fork Length (Axle-To-Crown)	404mm	404mm	404mm	404mm	404mm
Trail	70.5mm high	67.3mm high	67.3mm high	64.1mm mid/neutral	60.8mm mid/neutral
Mechanical Trail	66.5mm	63.6mm	63.6mm	60.7mm	57.9mm
Wheel Flop	22.2mm	20.7mm	20.7mm	19.3mm	17.9mm
Tire to Pedal Spindle	85.9mm 170 mm cranks	91.8mm 170 mm cranks	102.5mm 170 mm cranks	112.2mm 170 mm cranks	116.1mm 170 mm cranks
Pedal Spindle to Ground Clearance	109mm 170 mm cranks	109mm 170 mm cranks	110mm 170 mm cranks	111mm 170 mm cranks	111mm 170 mm cranks

Published Sizing Recommendations

Height

160 cm

170 cm

168 cm

178 cm

176 cm

188 cm

186 cm

195 cm

193 cm

205 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://en.author.eu/adventure/gravel-bike/author-ronin-sl-2020-ua42930602