HK1837 wrote:Where are you getting your km travelled from? It will change with the bigger tyres. The 265/70’s are about 3.5% larger in diameter so your km covered decreases by the same.
TOYZX wrote:It's simple the diameter and the fact that it requires more force to rotate them hence more fuel. I think you need to read up on how to read tyre sizes, 285 may on be the width but the profile represents a percentage of that width meaning a larger diameter.
Sent from my SM-G955F using Tapatalk
Blocklayer wrote:HK1837 wrote:Where are you getting your km travelled from? It will change with the bigger tyres. The 265/70’s are about 3.5% larger in diameter so your km covered decreases by the same.
You can calculate the differences in tyre sizes for Speedometer and Odometer pretty easily here:
https://www.blocklayer.com/tire-size-calculator.aspx
.
HK1837 wrote:It is pretty simple once you stand back and think about it. If you want to fit larger tyres and want it to perform similarly to how it does as delivered you need to change the axle ratios and fit larger rotors for the same reason. As TOYZX says the radius of the tyre affects the force required to turn them as you are basically changing the gearing of the vehicle. Almost identically the force required to stop the vehicle also needs to increase. You overcome the engine versus tyre diameter by changing the gearing. You don't have this gearing option with braking so you change the rotor diameter.
You've already cottoned onto the transmission temperature, this is essentially all generated by the torque converter being unlocked. You will probably find that what you think is 6th to 5th transition is actually the converter unlocking. You can only fix this by changing gearing, but by fitting another inline air to oil cooler you'll alleviate it. Wholesale Autos sell a decent cooler that is a bolt in, but they also sell a good lockup kit for the converter if you want to go down that path. I have a full manual kit, but I don't use it that much. I find knocking it back to 4th (from 5th as I have an A750F 5spd auto) when towing drops the trans temperature quickly. I have a Wholesale Autos cooler too.
Stiff1 wrote:Sorry fellas just edited couple of grammar errors in my original post.
Yep both good points, my speedo reads slightly under my actual speed with the factory issued Geolandars (65 profile) on (checked against GPS, Dash Cam and Speedometer App)
Interestingly, the higher profile Mickey Thompson’s (70 profile) make the speedo read spot on accurate.
gaspergartner wrote:Stiff1 wrote:Sorry fellas just edited couple of grammar errors in my original post.
Yep both good points, my speedo reads slightly under my actual speed with the factory issued Geolandars (65 profile) on (checked against GPS, Dash Cam and Speedometer App)
Interestingly, the higher profile Mickey Thompson’s (70 profile) make the speedo read spot on accurate.
Note that ODO and speedo are not synchronised, speedo shows you higher speed, but distance on ODO is accurate with stock tyres.
gaspergartner wrote:Stiff1 wrote:Sorry fellas just edited couple of grammar errors in my original post.
Yep both good points, my speedo reads slightly under my actual speed with the factory issued Geolandars (65 profile) on (checked against GPS, Dash Cam and Speedometer App)
Interestingly, the higher profile Mickey Thompson’s (70 profile) make the speedo read spot on accurate.
Note that ODO and speedo are not synchronised, speedo shows you higher speed, but distance on ODO is accurate with stock tyres.
HK1837 wrote:gaspergartner wrote:Stiff1 wrote:Sorry fellas just edited couple of grammar errors in my original post.
Yep both good points, my speedo reads slightly under my actual speed with the factory issued Geolandars (65 profile) on (checked against GPS, Dash Cam and Speedometer App)
Interestingly, the higher profile Mickey Thompson’s (70 profile) make the speedo read spot on accurate.
Note that ODO and speedo are not synchronised, speedo shows you higher speed, but distance on ODO is accurate with stock tyres.
Really? Where do the two different signals come from? I can tell you that on my 2011 the odometer changed between standard 255/70/15 tyres and 265/65/17 tyres. As Measured against the 5 x 1km signs along the M1 motorway it ended up close to correct with the bigger tyres but was way off with the smaller tyres. It had an Eclipse AVN726EA fitted when it was new and the speedo was almost corrected against the satnav with the bigger tyres.
Users browsing this forum: No registered users and 19 guests