2020 Norco Bicycles Threshold A1

	48	50.5	53	55.5	58	60.5
Stack	523mm	537mm	553mm	570mm	588mm	608mm
Reach	370mm	374mm	379mm	386mm	395mm	404mm
Stack to Reach Ratio	1.41:1	1.44:1	1.46:1	1.48:1	1.49:1	1.5:1
Seat Tube Length, C-T	480mm	505mm	530mm	555mm	580mm	605mm
Top Tube Length, Effective/Horizontal HT Top	510mm	522.5mm	537.5mm	555mm	572.5mm	590mm
Top Tube Slope	6.9deg	5.7deg	4.7deg	4deg	3.3deg	2.9deg
Head Tube Angle	70deg	70.5deg	71.25deg	72deg	72.25deg	72.5deg
Seat Tube Angle	75deg	74.5deg	74deg	73.5deg	73.25deg	73deg
Head Tube Length	105mm	117.5mm	130mm	145mm	165mm	185mm
Bottom Bracket Drop	70mm	70mm	70mm	70mm	68.5mm	68.5mm
Bottom Bracket Height	276mm	276mm	276mm	276mm	277.5mm	277.5mm
Chainstay Length	420mm	420mm	422.5mm	422.5mm	425mm	425mm
Chainstay Length Horizontal	414.1mm	414.1mm	416.7mm	416.7mm	419.4mm	419.4mm
Front-Center	593mm	597mm	597.5mm	603.4mm	616.4mm	628.3mm
Front-Center Horizontal	588.9mm	592.9mm	593.3mm	599.3mm	612.6mm	624.6mm
Wheelbase	1003mm	1007mm	1010mm	1016mm	1032mm	1044mm
Fork Offset/Rake	51mm	51mm	48mm	48mm	48mm	48mm
Fork Length (On-Axis)	395mm	395mm	395mm	395mm	395mm	395mm
Trail	71.7mm high	68.4mm high	66.8mm high	62mm mid/neutral	60.4mm mid/neutral	58.8mm mid/neutral
Mechanical Trail	67.3mm	64.5mm	63.2mm	58.9mm	57.5mm	56mm
Wheel Flop	23mm	21.5mm	20.3mm	18.2mm	17.5mm	16.9mm
Standover Height	701mm	724mm	746mm	769mm	794mm	817mm
Tire to Pedal Spindle	77mm 170 mm cranks	81mm 170 mm cranks	79mm 172.5 mm cranks	84.9mm 172.5 mm cranks	95.4mm 175 mm cranks	107.3mm 175 mm cranks
Pedal Spindle to Ground Clearance	106mm 170 mm cranks	106mm 170 mm cranks	103.5mm 172.5 mm cranks	103.5mm 172.5 mm cranks	102.5mm 175 mm cranks	102.5mm 175 mm cranks

	48	50.5	53	55.5	58	60.5
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	35mm	35mm	35mm	35mm	35mm	35mm
Tire Outer Diameter	692mm	692mm	692mm	692mm	692mm	692mm
Bike Length with Tires	1695mm	1699mm	1702mm	1708mm	1724mm	1736mm
Crank Length	170mm	170mm	172.5mm	172.5mm	175mm	175mm
Stem Length	90mm	90mm	100mm	100mm	110mm	110mm

Published Sizing Recommendations

Height

5 ft 0 in

5 ft 3.5 in

5 ft 2.5 in

5 ft 6 in

5 ft 5 in

5 ft 8.5 in

5 ft 7.5 in

5 ft 11 in

5 ft 10 in

6 ft 1.5 in

6 ft 0.5 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://www.norco.com/bikes/2020/road/cyclocross/threshold-aluminum/threshold-a1/