Compare: 2017 Ridley Bikes Helium X Base L vs 2023 BXT BX-Road-145 Pro-145 58

Insights

Somewhat upright stack and reach vs trend of performance road bikes

Design deviates from other sizes of Ridley Bikes Helium X

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of BXT BX-Road-145

Stack	599mm	582mm -17mm
Reach	396mm	396.1mm +0.1mm
Stack to Reach Ratio	1.51:1	1.47:1
Seat Tube Length, C-T	570mm	540mm -30mm
Seat Tube Length, C-C	530mm	—
Top Tube Length, Effective/Horizontal Center	585mm	574mm -11mm
Top Tube Length, Actual C-C	567mm	—
Top Tube Slope	7.2deg	6.8deg -0.4deg
Head Tube Angle	73.5deg	73.8deg +0.3deg
Seat Tube Angle	72.5deg	73deg +0.5deg
Head Tube Length	202mm	171mm -31mm
Bottom Bracket Drop	63mm	70mm +7mm
Bottom Bracket Height	273mm	269mm -4mm
Chainstay Length	408mm	410mm +2mm
Chainstay Length Horizontal	403.1mm	404mm +0.9mm
Front-Center	605.2mm	595.8mm -9.4mm
Front-Center Horizontal	601.9mm	591.7mm -10.2mm
Wheelbase	1005mm	995.7mm -9.3mm
Fork Offset/Rake	45.2mm	45mm -0.2mm
Fork Length (Axle-To-Crown)	—	375mm
Trail	52.4mm mid/neutral	51.6mm -0.8mm mid/neutral
Mechanical Trail	50.3mm	49.6mm -0.7mm
Wheel Flop	14.3mm	13.8mm -0.5mm
Tire to Pedal Spindle	99.2mm 170 mm cranks	86.8mm -12.4mm 170 mm cranks
Pedal Spindle to Ground Clearance	103mm 170 mm cranks	99mm -4mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	25mm	28mm +3mm
Tire Outer Diameter	672mm	678mm +6mm
Bike Length with Tires	1677mm	1673.7mm -3.3mm
Suspension Type	Rigid, non-suspension corrected	Rigid, non-suspension corrected
Bar Type	Drop Bar	Drop Bar
Frame Material	Carbon/Composite	Carbon/Composite
Fork Material	Carbon/Composite	Carbon/Composite
Brake Type	Rim	Disc

Actions	Collection I've Ridden	Collection I've Ridden
Source	ridley	https://www.bxtcycle.com/bxt-road-145_p75.html
Brand	Ridley Bikes	BXT
Bike	2017 Helium X Base	2023 BX-Road-145 Pro-145
Size	L	58
Category	Performance Road	Performance Road