2022 J.Laverack Bicycles R J.ACK Disc Classic Base

	48	50	52	54	56	58	60	62
Stack	509.6mm	520.7mm	541.4mm	560.4mm	569.9mm	586mm	600.3mm	611.7mm
Reach	358mm	364mm	370mm	376mm	382mm	388mm	394mm	400mm
Stack to Reach Ratio	1.42:1	1.43:1	1.46:1	1.49:1	1.49:1	1.51:1	1.52:1	1.53:1
Seat Tube Length, C-T	480mm	500mm	515mm	530mm	545mm	560mm	575mm	595mm
Top Tube Length, Effective/Horizontal Center	513.8mm	523.2mm	535.5mm	547.3mm	556.2mm	567.2mm	577.5mm	587mm
Top Tube Length, Actual C-C	499.6mm	510.4mm	521.1mm	532.1mm	541.9mm	552.2mm	562.5mm	573.2mm
Top Tube Slope	6.6deg	5.6deg	6.3deg	6.6deg	6deg	6.2deg	6.1deg	5.3deg
Head Tube Angle	70.5deg	71deg	71.5deg	71.5deg	71.5deg	72deg	72deg	72.5deg
Seat Tube Angle	73deg	73deg	73deg	73deg	73deg	73deg	73deg	73deg
Head Tube Length	110mm	120mm	140mm	160mm	170mm	185mm	200mm	210mm
Bottom Bracket Drop	68mm	68mm	68mm	68mm	68mm	68mm	68mm	68mm
Bottom Bracket Height	271mm	271mm	271mm	271mm	271mm	271mm	271mm	271mm
Chainstay Length	415mm	415mm	415mm	415mm	415mm	415mm	415mm	415mm
Chainstay Length Horizontal	409.4mm	409.4mm	409.4mm	409.4mm	409.4mm	409.4mm	409.4mm	409.4mm
Front-Center	566.2mm	571.5mm	579.9mm	592.1mm	601.2mm	607.4mm	618mm	622.3mm
Front-Center Horizontal	562.1mm	567.5mm	575.9mm	588.2mm	597.4mm	603.6mm	614.3mm	618.6mm
Wheelbase	971.5mm	976.9mm	985.3mm	997.6mm	1006.8mm	1013mm	1023.7mm	1028mm
Fork Offset/Rake	45mm	45mm	45mm	45mm	45mm	45mm	45mm	45mm
Trail	72.3mm high	69.1mm high	66mm high	66mm high	66mm high	62.8mm mid/neutral	62.8mm mid/neutral	59.7mm mid/neutral
Mechanical Trail	68.2mm	65.4mm	62.6mm	62.6mm	62.6mm	59.8mm	59.8mm	56.9mm
Wheel Flop	22.8mm	21.3mm	19.9mm	19.9mm	19.9mm	18.5mm	18.5mm	17.1mm
Standover Height	728.5mm	743mm	759.6mm	775mm	786.8mm	801.3mm	815.2mm	830.8mm
Tire to Pedal Spindle	57.2mm 170 mm cranks	62.5mm 170 mm cranks	70.9mm 170 mm cranks	83.1mm 170 mm cranks	92.2mm 170 mm cranks	98.4mm 170 mm cranks	109mm 170 mm cranks	113.3mm 170 mm cranks
Pedal Spindle to Ground Clearance	101mm 170 mm cranks	101mm 170 mm cranks	101mm 170 mm cranks	101mm 170 mm cranks	101mm 170 mm cranks	101mm 170 mm cranks	101mm 170 mm cranks	101mm 170 mm cranks

	48	50	52	54	56	58	60	62
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	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	28mm	28mm	28mm	28mm	28mm	28mm	28mm	28mm
Tire Width Max	32mm	32mm	32mm	32mm	32mm	32mm	32mm	32mm
Tire Outer Diameter	678mm	678mm	678mm	678mm	678mm	678mm	678mm	678mm
Bike Length with Tires	1649.5mm	1654.9mm	1663.3mm	1675.6mm	1684.8mm	1691mm	1701.7mm	1706mm

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.

Learn more about the Upright/Aggressive Scale

Category Trend

Endurance Road

Source:https://www.jlaverack.co.uk/r-jack-disc-titanium-frameset/#1513255300444-459684ae-ec90

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2022 J.Laverack Bicycles R J.ACK Disc Classic Base

Geometry

Base Build

Stack and Reach vs. Category Trend