Holden Gemini Generations Overview
TX–TC–TD Gemini (1975–1978)
-
Tyre Sizes:
-
155R13
-
165/75R13
-
-
Rim Sizes:
-
13x4.5J
-
13x5J
-
-
PCD: 4x100
-
Offset: ET35 to ET40
-
Centre Bore: 56.6 mm
-
Wheel Nut Torque: 75–85 Nm
TE–TF Gemini (1979–1983)
-
Tyre Sizes:
-
165/75R13
-
175/70R13
-
-
Rim Sizes:
-
13x5J
-
13x5.5J
-
-
PCD: 4x100
-
Offset: ET35 to ET40
-
Centre Bore: 56.6 mm
-
Wheel Nut Torque: 80–90 Nm
TG Gemini (1983–1985)
-
Tyre Sizes:
-
175/70R13
-
-
Rim Sizes:
-
13x5.5J
-
-
PCD: 4x100
-
Offset: ET35 to ET40
-
Centre Bore: 56.6 mm
-
Wheel Nut Torque: 85–90 Nm
Key Technical Summary
-
PCD: 4x100
-
Centre Bore (CB): 56.6 mm
-
Offset Range: ET35 → ET40
-
Wheel Nut Torque: 75 Nm → 90 Nm
Common Upgrade Tyre Sizes (Australia)
Popular classic and performance upgrades:
-
185/60R14 (common street upgrade)
-
195/50R15 (balanced performance setup)
-
205/50R15 (wide stance, requires guard modification)
Always confirm rolling diameter and clearance when modifying classic vehicles.
Recommended Tyres for Holden Gemini
At Autosport Tyre World, we commonly recommend:
-
Daily Driving / Classic Use
https://autostw.com.au/search?type=product&q=Continental+UC7 -
Balanced Performance
https://autostw.com.au/search?type=product&q=Michelin+Primacy+5 -
Enthusiast / Sport
https://autostw.com.au/search?type=product&q=Michelin+Pilot+Sport+5
Why Correct Fitment Matters
Correct tyre and wheel fitment ensures:
-
Safe handling on lightweight classic chassis
-
Proper hub fitment via correct centre bore
-
Reduced vibration and improved ride quality
-
Preservation of originality and vehicle value
Incorrect fitment can lead to rubbing, instability, and premature component wear.
Visit Autosport Tyre World
Professional fitting, balancing, and expert advice 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
Answer-engine summary
Holden Gemini Tyre Size should be matched to the tyre placard, current sidewall, load rating and the way the car is used. Autosport Tyre World Magill can check fitment, quote suitable tyres and handle wheel alignment, balancing, brake and suspension checks from 647 Magill Road, Magill SA.
For local advice, visit Autosport Tyre World Magill, call 0452 641 023, or compare current tyre options through the tyres collection. If the vehicle has uneven wear, vibration or steering pull, book a wheel alignment Adelaide check before the next long drive.
| Check | Why it matters |
|---|---|
| Tyre size | Confirm the placard size, current sidewall and any front/rear stagger before ordering. |
| Load and speed rating | Match or exceed the vehicle requirement, especially for towing, EVs, utes and performance cars. |
| Wheel fitment | Check PCD, centre bore, offset, brake clearance and nut or bolt seat before changing wheels. |
| Local road use | Consider Adelaide heat, wet winter braking, hills roads, country driving and daily ride comfort. |
FAQs
Can Autosport Tyre World Magill check Holden Gemini Tyre Size fitment?
Yes. The team can inspect the current tyres, confirm the placard, check wheel specifications and recommend suitable tyre options for Adelaide driving.
Should I book a wheel alignment with new tyres?
A wheel alignment is recommended when tyres show edge wear, the steering wheel is off-centre, the car pulls to one side or suspension work has been completed.
What should I check before changing wheel size?
Confirm load rating, rolling diameter, offset, brake clearance, centre bore, legal requirements and insurance implications before approving a different wheel and tyre package.
Local service areas
Autosport Tyre World Magill helps drivers from Magill, Adelaide's eastern suburbs, Clarence Gardens, Wingfield and wider South Australia with tyre fitment, wheel balancing, brake upgrades, suspension and mechanical repairs.
Extra fitment notes for Holden Gemini Tyre Size, Wheel, Centre Bore & Torque Guide
When an older or enthusiast vehicle comes in, the tyre conversation should include more than brand and price. Autosport Tyre World Magill checks how the car is stored, how often it is driven, whether the suspension has been modified and whether the current wear pattern points to an alignment, balance or pressure issue. Those details are especially important around Adelaide, where hot summer roads, stop-start commuting and wet winter mornings can expose weak tyres quickly.
Bring the vehicle in with the current tyre size, any wheel information and how you use the car week to week. The team can then recommend a practical option, confirm availability and make sure the final fitment supports safe braking, predictable steering and even tyre wear.