david lewis Posted November 15, 2015 Report Share Posted November 15, 2015 hi all, how can i find the width of my wheels without taking the tyres off,i am not sure if i have 3.5 or 4.5 wheeels fitted-is there a code etched on them anywhere?. cheers Link to comment Share on other sites More sharing options...
Pete Lewis Posted November 15, 2015 Report Share Posted November 15, 2015 just tape measure the rim through a cooling slot or any rough means , two sticks and a tape , youre looking for an inch , it should show up quite easy. and you will have a good clue , knock off 3/4" for the bead rim rim Pete Link to comment Share on other sites More sharing options...
david lewis Posted November 15, 2015 Author Report Share Posted November 15, 2015 thanks pete,i will give it a try before i order new tyres. Link to comment Share on other sites More sharing options...
Pete Lewis Posted November 15, 2015 Report Share Posted November 15, 2015 What car is this for ..? Link to comment Share on other sites More sharing options...
david lewis Posted November 16, 2015 Author Report Share Posted November 16, 2015 hi pete its for a 13/60 but it has a spitfire engine and 4 syncro box and so i am not sure if the wheels are original. cheers Link to comment Share on other sites More sharing options...
Clive Posted November 17, 2015 Report Share Posted November 17, 2015 155 80 will fit either rim, and be the standard size. Likewise 145 80's. If you want larger is 165/70 you will need the 4.5j size. I did think it was stamped on the rims, under the hubcap somewhere. Link to comment Share on other sites More sharing options...
JohnD Posted November 17, 2015 Report Share Posted November 17, 2015 The most accurate way would be to use a pair of calipers. A pair as big as required would be hard to find, but it's fairly easy to make up a pair from wood laths. See pic. Nails glued on to the arms act as the pointers. Attach a piece of card at the pivot and calibrate it before use, as you will have to disturb the setting to get it off and over the tyre. Or, just mark the card when on the rims, reposition it off the wheel and measure. John Link to comment Share on other sites More sharing options...
david lewis Posted November 17, 2015 Author Report Share Posted November 17, 2015 thanks for your advice guys--i think i will go for the155 size. cheers Link to comment Share on other sites More sharing options...
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