Compare: 2025 OG-EVKIN LOONG Base L vs 2017 Ridley Bikes Helium X Base S

Insights

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of Ridley Bikes Helium X

Stack	555mm	542mm -13mm
Reach	387.9mm	384mm -3.9mm
Stack to Reach Ratio	1.43:1	1.41:1
Seat Tube Length, C-T	—	510mm
Seat Tube Length, C-C	—	470mm
Seat Tube Length, Unknown	480mm	—
Top Tube Length, Effective/Horizontal Center	546.4mm	545mm -1.4mm
Top Tube Length, Actual C-C	—	529mm
Top Tube Slope	10.2deg	7.6deg -2.6deg
Head Tube Angle	72.5deg	73deg +0.5deg
Seat Tube Angle	73.8deg	73.5deg -0.3deg
Head Tube Length	150mm	142mm -8mm
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	588.7mm	581.2mm -7.5mm
Front-Center Horizontal	584.9mm	577.4mm -7.5mm
Wheelbase	984.1mm	977mm -7.1mm
Fork Offset/Rake	41.4mm	45.8mm +4.4mm
Fork Length, Unknown	375.4mm	—
Trail	63.5mm mid/neutral	54.8mm -8.7mm mid/neutral
Mechanical Trail	60.6mm	52.4mm -8.2mm
Wheel Flop	18.2mm	15.3mm -2.9mm
Tire to Pedal Spindle	79.7mm 170 mm cranks	75.2mm -4.5mm 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	1662.1mm	1649mm -13.1mm
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	L	S
Category	Performance Road	Performance Road