Bigger tyres , by how much does it effect speedo accuracy ?

[Bloodyaussie]

My speedo is spot on with 33's on but with the 265's its out by 5 kmh at 60kmh and 10kmh at a 100kmh

[Limmy]

i just downloaded an app for android mobile called SPEEDVIEW . uses GPS for speedometer . I will test it later

[threedogs]

Larger tyres will also affect acceleration, braking and fuel usage

[Winnie]

Larger tyres will also affect acceleration, braking and fuel usage

By how much?

[threedogs]

Bigger rolling diameter will affect your take off and that depends on heaps of thing motor, diff ratios etc.
Heavier rolling diameter will affect your braking ability too,
You should know this cause if you put 31 back on, your GQ would fly

[Winnie]

Yeah I know was just having a laugh..... huge difference between my 265s and the 33s.

[Clunk]

Yeah I know was just having a laugh..... huge difference between my 265s and the 33s.

Must be a diesel thing coz I didn't notice the difference in my petty........ But then again that's probably due to me driving Miss Daisy

[Winnie]

I don't know what it is really, the 33s that came on the car were bugger all different to my 265s but my Silverstones really suck the power from the car.

[janderson]

This should help

http://www.csgnetwork.com/speedocalibcalc.html

[mandrake]

Can the speedos be calibrated?