Compare: 2025 OG-EVKIN LOONG Base XL vs 2017 Ridley Bikes Helium X Base M

Insights

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of Ridley Bikes Helium X

Stack	568.2mm	573mm +4.8mm
Reach	395.5mm	390mm -5.5mm
Stack to Reach Ratio	1.44:1	1.47:1
Seat Tube Length, C-T	—	540mm
Seat Tube Length, C-C	—	500mm
Seat Tube Length, Unknown	500mm	—
Top Tube Length, Effective/Horizontal Center	561.1mm	565mm +3.9mm
Top Tube Length, Actual C-C	—	548mm
Top Tube Slope	9.4deg	7.4deg -2deg
Head Tube Angle	72.5deg	73.5deg +1deg
Seat Tube Angle	73.5deg	73deg -0.5deg
Head Tube Length	163.8mm	172mm +8.2mm
Bottom Bracket Drop	68mm	66mm -2mm
Bottom Bracket Height	271mm	270mm -1mm
Chainstay Length	405mm	405mm +0mm
Chainstay Length Horizontal	399.3mm	399.6mm +0.3mm
Front-Center	600.5mm	590.1mm -10.4mm
Front-Center Horizontal	596.7mm	586.4mm -10.3mm
Wheelbase	995.9mm	986mm -9.9mm
Fork Offset/Rake	41.4mm	44.3mm +2.9mm
Fork Length, Unknown	375.4mm	—
Trail	63.5mm mid/neutral	53.3mm -10.2mm mid/neutral
Mechanical Trail	60.5mm	51.1mm -9.4mm
Wheel Flop	18.2mm	14.5mm -3.7mm
Tire to Pedal Spindle	91.5mm 170 mm cranks	84.1mm -7.4mm 170 mm cranks
Pedal Spindle to Ground Clearance	101mm 170 mm cranks	100mm -1mm 170 mm cranks

Wheel Size	700C/29 in 622 mm BSD	700C/29 in 622 mm BSD
Tire Width	28mm	25mm -3mm
Tire Outer Diameter	678mm	672mm -6mm
Bike Length with Tires	1673.9mm	1658mm -15.9mm
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	Disc	Rim

Actions	Collection I've Ridden	Collection I've Ridden
Source	https://ogevkinbike.com/products/loong-road-frame-disc-brake?variant=41145827000476	ridley
Brand	OG-EVKIN	Ridley Bikes
Bike	2025 LOONG Base	2017 Helium X Base
Size	XL	M
Category	Performance Road	Performance Road