sulzerman Posted May 7, 2023 Report Share Posted May 7, 2023 Hi all I am running a spitfire mk1V in standard form except for 1500 engine on 155x13 tyres. The handbook specifies 145 X 13. Should I be running on 145 X 13's as specified by triumph? Would the steering be lighter on 145's? Many thanks Link to comment Share on other sites More sharing options...
Josef Posted May 7, 2023 Report Share Posted May 7, 2023 Have a look at Courier 456, June 2018. Phil Wilson’s article on page 16 explains all you need to know about tyres on small chassis Triumphs! (Should be available via the club website) 1 Link to comment Share on other sites More sharing options...
DanMi Posted May 7, 2023 Report Share Posted May 7, 2023 I would put 155*13 on a mk4 the very early ones were fitted with 145 * 13 but post 72 was 155. They all have 4.5j so 155 is OK https://www.longstonetyres.co.uk/classic-car-tyres/triumph/spitfire.html 1 Link to comment Share on other sites More sharing options...
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