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

Insights

Average stack and reach vs trend of performance road bikes

Design deviates from other sizes of Ridley Bikes Helium X

Stack	534.2mm	526mm -8.2mm
Reach	377.8mm	374mm -3.8mm
Stack to Reach Ratio	1.41:1	1.41:1
Seat Tube Length, C-T	—	480mm
Seat Tube Length, C-C	—	440mm
Seat Tube Length, Unknown	460mm	—
Top Tube Length, Effective/Horizontal Center	528.2mm	525mm -3.2mm
Top Tube Length, Actual C-C	—	509mm
Top Tube Slope	10.3deg	8.5deg -1.8deg
Head Tube Angle	72deg	72deg +0deg
Seat Tube Angle	74deg	74deg +0deg
Head Tube Length	130mm	127mm -3mm
Bottom Bracket Drop	68mm	68mm +0mm
Bottom Bracket Height	271mm	268mm -3mm
Chainstay Length	405mm	405mm +0mm
Chainstay Length Horizontal	399.3mm	399.3mm +0mm
Front-Center	577.7mm	573.8mm -3.9mm
Front-Center Horizontal	573.7mm	569.8mm -3.9mm
Wheelbase	972.9mm	969mm -3.9mm
Fork Offset/Rake	42.2mm	44.6mm +2.4mm
Fork Length, Unknown	375.4mm	—
Trail	65.8mm high	62.2mm -3.6mm mid/neutral
Mechanical Trail	62.6mm	59.2mm -3.4mm
Wheel Flop	19.3mm	18.3mm -1mm
Tire to Pedal Spindle	68.7mm 170 mm cranks	67.8mm -0.9mm 170 mm cranks
Pedal Spindle to Ground Clearance	101mm 170 mm cranks	98mm -3mm 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	1650.9mm	1641mm -9.9mm
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	M	XS
Category	Performance Road	Performance Road