Introduction
The Ferrari 125 S is the very first Ferrari ever built, debuting in 1947 and marking the beginning of Ferrari’s legendary history.
As a historic race car, the 125 S differs significantly from modern vehicles — with bespoke wheels, tyres, and engineering that do not follow modern sizing standards.
At AUTOSPORT TYREWORLD Adelaide, we specialise not only in modern performance vehicles but also understand the importance of classic and heritage vehicle fitment, restoration support, and tyre knowledge.
This guide covers:
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Historical tyre sizing references
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Early wheel specifications
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PCD, centre bore considerations
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Torque and fastening notes
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Modern interpretation for collectors and restorations
Ferrari 125 S Historical Tyre Sizes
The Ferrari 125 S used period-correct cross-ply tyres, not modern radial sizes.
Original Fitment (Period Correct)
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Approx. 5.50 – 16 (Front & Rear)
These tyres were:
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Cross-ply construction
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Narrow profile
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Designed for lightweight racing conditions
Ferrari 125 S Wheel Specifications
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Wheel Diameter: 16"
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Wheel Width: Approx. 4.5J – 5J (varies by build)
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Construction: Wire wheels / early steel racing wheels
Bolt Pattern (PCD)
Due to its early bespoke construction:
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Non-standard / custom hub design
Modern PCD references (like 5x114.3) do not apply.
Centre Bore
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Custom hub-centric design
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No standardised centre bore measurement
Wheel Bolt / Fastening System
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Typically centre-lock knock-off hubs (period racing design)
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Not modern bolt/nut systems
Torque Specification
Traditional torque specifications do not apply in the modern sense.
Instead:
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Tightened using knock-off hammer tools
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Torque depends on proper seating and mechanical locking
Tyre Requirements (Modern Perspective)
For restored or replica Ferrari 125 S vehicles:
Key Requirements
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Period-correct appearance
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Safe modern rubber compounds
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Compatible load rating
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Correct rolling diameter
Recommended Tyres (Modern Classic Use)
Period-Correct Style
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Michelin Classic range
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Pirelli Collezione series
Key Focus
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Maintain authenticity
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Improve safety with modern compounds
Important Notes for Owners
The Ferrari 125 S is:
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A collector-level historic vehicle
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Typically not driven on public roads regularly
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Maintained under specialist restoration conditions
Any tyre or wheel work should be handled with extreme care and expertise.
Why Proper Fitment Matters (Classic Ferrari)
Incorrect fitment can result in:
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Damage to rare components
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Unsafe driving conditions
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Loss of historical authenticity
At AUTOSPORT TYREWORLD Adelaide, we can assist with:
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Classic tyre sourcing guidance
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Fitment advice
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Modern equivalents for safe operation
Visit AUTOSPORT TYREWORLD Adelaide
Specialist tyre advice and fitment support available at:
Magill
647 Magill Road, Magill SA 5072
0452 641 023
Wingfield
411 Grand Junction Road, Wingfield SA 5013
0433 645 411
Clarence Gardens
911 South Road, Clarence Gardens SA 5039
0420 299 911