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

Insights

Average 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	526mm	534.2mm +8.2mm
Reach	374mm	377.8mm +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	525mm	528.2mm +3.2mm
Top Tube Length, Actual C-C	509mm	—
Top Tube Slope	8.5deg	10.3deg +1.8deg
Head Tube Angle	72deg	72deg +0deg
Seat Tube Angle	74deg	74deg +0deg
Head Tube Length	127mm	130mm +3mm
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	573.8mm	577.7mm +3.9mm
Front-Center Horizontal	569.8mm	573.7mm +3.9mm
Wheelbase	969mm	972.9mm +3.9mm
Fork Offset/Rake	44.6mm	42.2mm -2.4mm
Fork Length, Unknown	—	375.4mm
Trail	62.2mm mid/neutral	65.8mm +3.6mm high
Mechanical Trail	59.2mm	62.6mm +3.4mm
Wheel Flop	18.3mm	19.3mm +1mm
Tire to Pedal Spindle	67.8mm 170 mm cranks	68.7mm +0.9mm 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	1641mm	1650.9mm +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	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	XS	M
Category	Performance Road	Performance Road