Triumph Spitfire 1500 Mk IV 71hp Roadster FH (1970-1980) Wheel Offset Calculator | Fitment Stance
Compare wheel and tire dimensions for the Triumph Spitfire 1500 Mk IV 71hp Roadster (FH (1970-1980)) against the recorded OEM baseline: 4.5x13 ET28, 155/80R13, 4x101.6.
Recorded OEM baseline
Verification pending. Recorded values are provisional; confirm the exact vehicle baseline before calculations or purchases.
| Years | FH (1970-1980) |
|---|---|
| Market | unspecified |
| Front wheel | 4.5x13 ET28 |
| Front tire | 155/80R13 |
| Rear wheel / tire | 4.5x13 ET28; 155/80R13 |
| Bolt pattern | 4x101.6 |
| Center bore | Not verified |
| Thread size | Not verified |
| Fastener / seat | Not verified |
How to use this record
The calculator compares nominal wheel and tire position with this OEM baseline. It does not calculate fender, suspension, brake, steering, or loaded clearance. Tires with the same printed size can differ by manufacturer. Confirm applicability for the exact year, market, trim, and package, then measure or test-fit before buying.
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