2025 4.0 Fairlight Cycles Strael Base

	51R	51T	54R	54T	56R	56T	58R	58T	61R	61T
Stack	530mm	560mm	548mm	580mm	566mm	600mm	584mm	620mm	602mm	640mm
Reach	380mm	370mm	386mm	378mm	394mm	386mm	402mm	394mm	410mm	402mm
Stack to Reach Ratio	1.39:1	1.51:1	1.42:1	1.53:1	1.44:1	1.55:1	1.45:1	1.57:1	1.47:1	1.59:1
Seat Tube Length, C-T	510mm	514mm	532mm	536mm	545mm	557mm	564mm	575mm	583mm	592mm
Top Tube Length, Effective/Horizontal Unknown	533mm	532mm	546mm	548mm	562mm	564mm	575mm	578mm	588mm	592mm
Top Tube Slope	4.4deg	7.3deg	4deg	7.1deg	4.5deg	6.9deg	4.4deg	7deg	4.3deg	7.2deg
Head Tube Angle	71.5deg	71.5deg	72.25deg	72.25deg	73deg	73deg	73.25deg	73.25deg	73.25deg	73.25deg
Seat Tube Angle	74deg	74deg	73.75deg	73.75deg	73.5deg	73.5deg	73.5deg	73.5deg	73.5deg	73.5deg
Head Tube Length	106mm	137mm	124mm	157mm	140mm	176mm	158mm	195mm	177mm	216mm
Bottom Bracket Drop	74mm	74mm	72mm	72mm	72mm	72mm	72mm	72mm	72mm	72mm
Bottom Bracket Height	265mm	265mm	267mm	267mm	267mm	267mm	267mm	267mm	267mm	267mm
Chainstay Length	419mm	419mm	419mm	419mm	419mm	419mm	419mm	419mm	419mm	419mm
Chainstay Length Horizontal	412.4mm	412.4mm	412.8mm	412.8mm	412.8mm	412.8mm	412.8mm	412.8mm	412.8mm	412.8mm
Front-Center	584.3mm	584.3mm	589.6mm	592.6mm	596.6mm	598.6mm	607.5mm	610.5mm	620.4mm	624.4mm
Front-Center Horizontal	585mm	585mm	590mm	592mm	596mm	599mm	607mm	610mm	621mm	624mm
Wheelbase	992mm	992mm	998mm	1001mm	1005mm	1007mm	1016mm	1019mm	1029mm	1033mm
Fork Offset/Rake	45mm	45mm	45mm	45mm	45mm	45mm	45mm	45mm	45mm	45mm
Fork Length (Axle-To-Crown)	381mm	381mm	381mm	381mm	381mm	381mm	381mm	381mm	381mm	381mm
Trail	66mm high	66mm high	61.3mm mid/neutral	61.3mm mid/neutral	56.6mm mid/neutral	56.6mm mid/neutral	55mm mid/neutral	55mm mid/neutral	55mm mid/neutral	55mm mid/neutral
Mechanical Trail	62.6mm	62.6mm	58.4mm	58.4mm	54.1mm	54.1mm	52.7mm	52.7mm	52.7mm	52.7mm
Wheel Flop	19.9mm	19.9mm	17.8mm	17.8mm	15.8mm	15.8mm	15.2mm	15.2mm	15.2mm	15.2mm
Standover Height	766mm	783mm	787mm	805mm	802mm	825mm	820mm	844mm	838mm	862mm
Tire to Pedal Spindle	75.3mm 170 mm cranks	75.3mm 170 mm cranks	80.6mm 170 mm cranks	83.6mm 170 mm cranks	87.6mm 170 mm cranks	89.6mm 170 mm cranks	98.5mm 170 mm cranks	101.5mm 170 mm cranks	111.4mm 170 mm cranks	115.4mm 170 mm cranks
Pedal Spindle to Ground Clearance	95mm 170 mm cranks	95mm 170 mm cranks	97mm 170 mm cranks	97mm 170 mm cranks	97mm 170 mm cranks	97mm 170 mm cranks	97mm 170 mm cranks	97mm 170 mm cranks	97mm 170 mm cranks	97mm 170 mm cranks

	51R	51T	54R	54T	56R	56T	58R	58T	61R	61T
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	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	28mm	28mm	28mm	28mm	28mm	28mm	28mm	28mm	28mm	28mm
Tire Width Max	39mm	39mm	39mm	39mm	39mm	39mm	39mm	39mm	39mm	39mm
Tire Outer Diameter	678mm	678mm	678mm	678mm	678mm	678mm	678mm	678mm	678mm	678mm
Bike Length with Tires	1670mm	1670mm	1676mm	1679mm	1683mm	1685mm	1694mm	1697mm	1707mm	1711mm

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://fairlightcycles.com/wp-content/uploads/2025/01/Fairlight-Strael-4.0-Design-Notes-v1.pdf

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2025 4.0 Fairlight Cycles Strael Base

Geometry

Base Build

Stack and Reach vs. Category Trend