2020 Ritchey Design Road Logic Disc Base

	49 cm	51 cm	53 cm	55 cm	57 cm	59 cm
Stack	515mm	531mm	551mm	570mm	589mm	610mm
Reach	380mm	385mm	390mm	394mm	400mm	409mm
Stack to Reach Ratio	1.36:1	1.38:1	1.41:1	1.45:1	1.47:1	1.49:1
Seat Tube Length, C-T	465mm	485mm	505mm	525mm	545mm	565mm
Top Tube Length, Effective/Horizontal Center	518mm	532mm	548mm	563mm	575mm	590mm
Top Tube Slope	7.5deg	7.1deg	7.1deg	7deg	6.8deg	6.8deg
Head Tube Angle	72deg	72.5deg	73deg	73.5deg	73.5deg	74deg
Seat Tube Angle	75deg	74.5deg	74deg	73.5deg	73.5deg	73.5deg
Head Tube Length	105mm	120mm	140mm	160mm	180mm	200mm
Bottom Bracket Drop	72mm	72mm	72mm	70mm	70mm	70mm
Bottom Bracket Height	267mm	267mm	267mm	269mm	269mm	269mm
Chainstay Length	410mm	410mm	415mm	415mm	415mm	415mm
Chainstay Length Horizontal	403.6mm	403.6mm	408.7mm	409.1mm	409.1mm	409.1mm
Front-Center	576.9mm	581.8mm	588.7mm	594.1mm	606mm	615.9mm
Front-Center Horizontal	572.4mm	577.4mm	584.3mm	590mm	602mm	612mm
Wheelbase	976mm	981mm	993mm	999mm	1011mm	1021mm
Fork Offset/Rake	46mm	46mm	46mm	46mm	46mm	46mm
Fork Length (On-Axis)	369mm	369mm	369mm	369mm	369mm	369mm
Trail	61.8mm mid/neutral	58.7mm mid/neutral	55.5mm mid/neutral	52.4mm mid/neutral	52.4mm mid/neutral	49.4mm mid/neutral
Mechanical Trail	58.8mm	55.9mm	53.1mm	50.3mm	50.3mm	47.4mm
Wheel Flop	18.2mm	16.8mm	15.5mm	14.3mm	14.3mm	13.1mm
Standover Height	740mm	757mm	777mm	797mm	816mm	836mm
Tire to Pedal Spindle	67.9mm 170 mm cranks	72.8mm 170 mm cranks	79.7mm 170 mm cranks	85.1mm 170 mm cranks	97mm 170 mm cranks	106.9mm 170 mm cranks
Pedal Spindle to Ground Clearance	97mm 170 mm cranks	97mm 170 mm cranks	97mm 170 mm cranks	99mm 170 mm cranks	99mm 170 mm cranks	99mm 170 mm cranks

	49 cm	51 cm	53 cm	55 cm	57 cm	59 cm
Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	28mm	28mm	28mm	28mm	28mm	28mm
Tire Width Max	30mm	30mm	30mm	30mm	30mm	30mm
Tire Outer Diameter	678mm	678mm	678mm	678mm	678mm	678mm
Bike Length with Tires	1654mm	1659mm	1671mm	1677mm	1689mm	1699mm

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://us.ritcheylogic.com/media/itm/magb1/Productfiles/97350008004/ritchey-road-logic-disc-my20-geometry-0420_1.pdf

Geometry