Rolling diameter
#1
Rolling diameter
For those tech savvy folk out there
So the xk cones fitted with 3.31 diff ratio and 285-30-20 rears
Now the questions is if I fit up 295-25-20 tyres on the rear the rolling diameter will be reduced from 26.73" to 25.81" will this improve my acceleration as technically I have now shorten my final Ratio
So the xk cones fitted with 3.31 diff ratio and 285-30-20 rears
Now the questions is if I fit up 295-25-20 tyres on the rear the rolling diameter will be reduced from 26.73" to 25.81" will this improve my acceleration as technically I have now shorten my final Ratio
#2
Out-the hole acceleration will be quicker, with upshifts occurring at the same engine RPM, which will again help the acceleration.
Thing is, 3.56% isn't a whole heck of a lot of a difference. While it would be measurable with the right equipment, the actual performance won't change much.
If you go with an even smaller diameter tire it would make a larger difference, but how small can it get with wheels big enough to fit the brakes and also have a small tire fit that smaller wheel, all while keeping the car from scraping the ground...
It would basically make your 3.31:1 into a3.42:1 with no differential mechanical work.
Not much change there.
Thing is, 3.56% isn't a whole heck of a lot of a difference. While it would be measurable with the right equipment, the actual performance won't change much.
If you go with an even smaller diameter tire it would make a larger difference, but how small can it get with wheels big enough to fit the brakes and also have a small tire fit that smaller wheel, all while keeping the car from scraping the ground...
It would basically make your 3.31:1 into a3.42:1 with no differential mechanical work.
Not much change there.
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#9
For those tech savvy folk out there
So the xk cones fitted with 3.31 diff ratio and 285-30-20 rears
Now the questions is if I fit up 295-25-20 tyres on the rear the rolling diameter will be reduced from 26.73" to 25.81" will this improve my acceleration as technically I have now shorten my final Ratio
So the xk cones fitted with 3.31 diff ratio and 285-30-20 rears
Now the questions is if I fit up 295-25-20 tyres on the rear the rolling diameter will be reduced from 26.73" to 25.81" will this improve my acceleration as technically I have now shorten my final Ratio
#10
The short answer is no. It will only affect your speedometer which will run faster because of the smaller diameter. Tirerack has a chart that will tell you your speedometer error. The higher the rear gears the quicker off the line or different gears in the transmission for better low end and last more torque will do the trick.
#11
The short answer is no. It will only affect your speedometer which will run faster because of the smaller diameter. Tirerack has a chart that will tell you your speedometer error. The higher the rear gears the quicker off the line or different gears in the transmission for better low end and last more torque will do the trick.
#12
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