ANyone here driving on a set of 255/85/16??
- Thread starter Duane
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siringo
Member
Bump bump...
Anyone running this size?? They're about the height of 33's but as wide as the stock size, 255.
Pro's, con's, otherwise, effect on fuel consumption and so on.
Thanks.
Anyone running this size?? They're about the height of 33's but as wide as the stock size, 255.
Pro's, con's, otherwise, effect on fuel consumption and so on.
Thanks.
The circumference (which equals the distance needed for one complete rotation of the wheel) is 2638.62mm, compared to the original 255/70R16 tyre's 2398.29. That makes it 10% larger - your odometer will read 10% under and your speedo will probably read lower than your actual speed (makes the vehicle unroadworthy).
Because the distance from axle-to-road is greater, the lever is longer - the axle needs more force to turn it over. Your car will feel less powerful, it will accelerate slower and use more fuel.
Because the distance from axle-to-road is greater, the lever is longer - the axle needs more force to turn it over. Your car will feel less powerful, it will accelerate slower and use more fuel.
siringo
Member
Thanks for the info Old.Tony. from info at 1010tire.com they say that the 255/70/16 rotates 692.1 times per mile, whereas the 255/85/16 rotates 629.1 times per mile, so that should mean less wear on your tyres.
A larger diameter tyre also menas that once you're up to speed you shouldn't need to push the motor as hard to sit on 100kmh because your gearing is slightly different.
As an example, if you sit on 100k's with stock tyres doing 2100 rpm, let's pretend you burn 10 litres of fuel.
With larger diameter tyres, your gearing is taller so you may only be sitting on 1900 revs to sit on 100k's which should mean you'd use less fuel.
Does that sound right / make sense, or am I completely wrong???
A larger diameter tyre also menas that once you're up to speed you shouldn't need to push the motor as hard to sit on 100kmh because your gearing is slightly different.
As an example, if you sit on 100k's with stock tyres doing 2100 rpm, let's pretend you burn 10 litres of fuel.
With larger diameter tyres, your gearing is taller so you may only be sitting on 1900 revs to sit on 100k's which should mean you'd use less fuel.
Does that sound right / make sense, or am I completely wrong???
