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    questions about landrover tyres :-)

    thanx for answering my questions about my car tyres, as i got a good responce from that i desided that i'd ask a few questions about my landrover

    i have a landrover defender td5 which i use for my job as a forester, i had the standard tyres (205/70/r16 i think), but desided to replace them with bigger tyres, i put on 234/85 r16 tyres and my fuel consumpion has gone through the roof....can anyone tell me what the best type of tyre would be best to replace it with as it was a second hand pair i bought, it looks like the tread is between all terrain and mud tyres,

    i just want big tyres to get me through fiends and not be large on the old fuel bill


    any help would be great

    6 Comments

    Original Poster

    thanx will post this up there too

    You may have typo'd but I'll try. If you originally had 205/70/r16 and you replaced only the tyres, then it is more likely you have 235 width followed by 65 profile followed by 16" rim. As the width of the tyre increases, 205-235 then the profile comes down 70 to 65 or 60. You say it increased to 85, and i think this is a typo. You must remember that each of the 4 tyres at 235 width has just put an extra 30mm of drag in each corner and will reduce your economy.

    Original Poster

    kyalion;4322445

    You may have typo'd but I'll try. If you originally had 205/70/r16 and … You may have typo'd but I'll try. If you originally had 205/70/r16 and you replaced only the tyres, then it is more likely you have 235 width followed by 65 profile followed by 16" rim. As the width of the tyre increases, 205-235 then the profile comes down 70 to 65 or 60. You say it increased to 85, and i think this is a typo. You must remember that each of the 4 tyres at 235 width has just put an extra 30mm of drag in each corner and will reduce your economy.



    sorry i did typo



    original was 205/80/r16

    ones i have on now are 235/85/r16

    spannerz;4322672

    sorry i did typooriginal was 205/80/r16ones i have on now are 230/85/r16



    Well, in that case you have just increased the rolling distance of the wheels. What that means is that each wheel will travel a bit further to complete one full revolution. This will have an impact on your economy. Why is the question to putting this spec tyre on. How do you calculate your mpg? Is it the on board computer?

    Original Poster

    kyalion;4322869

    Well, in that case you have just increased the rolling distance of the … Well, in that case you have just increased the rolling distance of the wheels. What that means is that each wheel will travel a bit further to complete one full revolution. This will have an impact on your economy. Why is the question to putting this spec tyre on. How do you calculate your mpg? Is it the on board computer?



    i've not calculated mpg yet, i can see that it's costing more in fuel but i don't know actual figures
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