2019 Norco Bicycles Threshold Aluminum Single Speed

	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
Head Tube Angle	70deg	70.5deg	71.25deg	72deg	72.25deg	72.5deg
Effective Seat Tube Angle, Unknown	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	274mm	274mm	274mm	274mm	275.5mm	275.5mm
Chainstay Length	427mm	427mm	429.5mm	429.5mm	432mm	432mm
Chainstay Length Horizontal	421.2mm	421.2mm	423.8mm	423.8mm	426.5mm	426.5mm
Front-Center	593mm	597mm	598mm	603mm	616mm	628mm
Front-Center Horizontal	588.8mm	592.8mm	593.2mm	599.2mm	612.5mm	624.5mm
Wheelbase	1010mm	1014mm	1017mm	1023mm	1039mm	1051mm
Fork Offset/Rake	50.7mm	50.3mm	47.6mm	48.3mm	48.7mm	48mm
Fork Length (On-Axis)	395mm	395mm	395mm	395mm	395mm	395mm
Trail	71.3mm high	68.4mm high	66.5mm high	61mm mid/neutral	58.9mm mid/neutral	58.1mm mid/neutral
Mechanical Trail	67mm	64.5mm	63mm	58mm	56.1mm	55.4mm
Wheel Flop	22.9mm	21.5mm	20.2mm	17.9mm	17.1mm	16.7mm
Standover Height	749mm	767mm	785mm	804mm	826mm	847mm
Tire to Pedal Spindle	79mm 170 mm cranks	83mm 170 mm cranks	81.5mm 172.5 mm cranks	86.5mm 172.5 mm cranks	97mm 175 mm cranks	109mm 175 mm cranks
Pedal Spindle to Ground Clearance	104mm 170 mm cranks	104mm 170 mm cranks	101.5mm 172.5 mm cranks	101.5mm 172.5 mm cranks	100.5mm 175 mm cranks	100.5mm 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	33mm	33mm	33mm	33mm	33mm	33mm
Tire Outer Diameter	688mm	688mm	688mm	688mm	688mm	688mm
Bike Length with Tires	1698mm	1702mm	1705mm	1711mm	1727mm	1739mm
Crank Length	170mm	170mm	172.5mm	172.5mm	175mm	175mm
Stem Length	90mm	90mm	100mm	100mm	110mm	110mm

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/2019/dirt-dropbar/cyclocross/threshold-aluminum/threshold-aluminum-single-speed/

Geometry