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

Insights

Somewhat aggressive 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

Stack	507mm	534.2mm +27.2mm
Reach	379mm	377.8mm -1.2mm
Stack to Reach Ratio	1.34:1	1.41:1
Seat Tube Length, C-T	450mm	—
Seat Tube Length, C-C	410mm	—
Seat Tube Length, Unknown	—	460mm
Top Tube Length, Effective/Horizontal Center	515mm	528.2mm +13.2mm
Top Tube Length, Actual C-C	501mm	—
Top Tube Slope	8.2deg	10.3deg +2.1deg
Head Tube Angle	71.8deg	72deg +0.2deg
Seat Tube Angle	75deg	74deg -1deg
Head Tube Length	107mm	130mm +23mm
Bottom Bracket Drop	68mm	68mm +0mm
Bottom Bracket Height	268mm	271mm +3mm
Chainstay Length	405mm	405mm +0mm
Chainstay Length Horizontal	399.3mm	399.3mm +0mm
Front-Center	574.8mm	577.7mm +2.9mm
Front-Center Horizontal	570.8mm	573.7mm +2.9mm
Wheelbase	970mm	972.9mm +2.9mm
Fork Offset/Rake	45mm	42.2mm -2.8mm
Fork Length, Unknown	—	375.4mm
Trail	63.1mm mid/neutral	65.8mm +2.7mm high
Mechanical Trail	59.9mm	62.6mm +2.7mm
Wheel Flop	18.7mm	19.3mm +0.6mm
Tire to Pedal Spindle	68.8mm 170 mm cranks	68.7mm -0.1mm 170 mm cranks
Pedal Spindle to Ground Clearance	98mm 170 mm cranks	101mm +3mm 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	1642mm	1650.9mm +8.9mm
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	Rim	Disc

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