Introduction
The Ferrari 275 GTB is one of Ferrari’s most iconic 1960s grand tourers, succeeding the 250 series and introducing key innovations such as independent rear suspension and improved weight distribution.
Available in multiple variants including:
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275 GTB (short nose / long nose)
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275 GTB/4
The 275 GTB combines classic Ferrari V12 performance with evolving tyre and wheel technology, including early adoption of radial tyres.
At AUTOSPORT TYREWORLD Adelaide, we provide expert advice for both modern performance vehicles and classic Ferrari restorations, ensuring correct fitment, safety, and authenticity.
This guide covers:
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Factory tyre sizes across variants
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OEM wheel specifications
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PCD, centre bore & hub systems
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Torque and fastening details
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Best modern tyre options
Ferrari 275 GTB Factory Tyre Sizes
The Ferrari 275 GTB transitioned from cross-ply to radial tyres, improving handling and stability.
Factory Sizes
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205VR14 (early models)
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205VR15 (most common setup)
Factory tyres included:
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Michelin XWX
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Pirelli Cinturato
These tyres provided:
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Improved high-speed stability
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Better grip vs earlier Ferrari models
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More predictable handling
Ferrari 275 GTB Wheel Specs
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Wheel Diameter: 14" / 15" (depending on model)
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Wheel Width: 6J – 7J
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Construction: Borrani wire wheels (standard)
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Optional: Alloy wheels (later variants)
Bolt Pattern (PCD)
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Non-standard / centre-lock system
No modern PCD specification applies.
Centre Bore
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Custom hub-centric design
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No standardised centre bore
Wheel Fastening System
Ferrari 275 GTB models typically used:
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Centre-lock knock-off hubs
Features:
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Single central spinner
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Hammer-tightened
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Designed for performance and racing heritage
Torque Specification
Modern torque values do not apply.
Instead:
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Tightened using mechanical locking force
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Correct seating is critical
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Requires specialist tools
Tyre Requirements (Modern Classic Use)
For restored Ferrari 275 GTB vehicles:
Key Requirements
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Period-correct appearance
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Modern safety standards
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Correct rolling diameter
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Suitable load rating
Recommended Tyres (Classic Ferrari 275 GTB)
Period-Correct Style
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Michelin XWX / Classic range
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Pirelli Cinturato (Collezione)
Benefits:
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Authentic vintage appearance
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Improved safety and grip
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Suitable for high-speed GT driving
Common Upgrade Considerations
At AUTOSPORT TYREWORLD, Ferrari 275 GTB owners often choose:
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Radial tyre upgrades (if still on cross-ply)
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Modern compounds with classic look
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Careful preservation of original Borrani wheels
Why Proper Fitment Matters (Classic Ferrari)
Incorrect fitment can result in:
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Damage to rare wheels
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Poor handling performance
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Safety risks
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Reduced collector value
We ensure:
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Authentic fitment guidance
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Safe modern equivalents
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Preservation of originality
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