my car has 275-45-20 on it
after readng this post i looked in the book, it says 255-50-20, hmmm
it seems from reading this that a Narrower tire with virtually the same wall Is a better ride
am i right RR 2005 4.4 petrol
Any spelling mistakes are the fault of spellchecker
Previous MG J2, CITROEN light 15 x 2 gone unfortunately
Present MERC 180e, RANGE ROVER L322, JAGUAR XJS, MERC 280SE, MG F, JAGUAR S-Type 6v 2003, jaguar s-type 8v 2004, Ford Cougar

these qotes are from google
Tires with a smaller diameter have a higher rolling resistance with the same inflation pressure, because tire deformation is proportionally greater. The tire is flattened more and is “less round”. Wider tires roll better than narrower tires.


And the wider the tire the higher the rolling resistance is and the harder the engine has to work to move the tire, thus decreasing the car's fuel efficiency. ... Larger tires can in fact, increase a vehicle's gas mileage if the vehicle is regularly traveling with consistent speeds over 60 miles per hour. RR 2005 4.4 petrol
Any spelling mistakes are the fault of spellchecker
Previous MG J2, CITROEN light 15 x 2 gone unfortunately
Present MERC 180e, RANGE ROVER L322, JAGUAR XJS, MERC 280SE, MG F, JAGUAR S-Type 6v 2003, jaguar s-type 8v 2004, Ford Cougar