[rishibravo]

I upsized the tyres in my palio 1.2 from stock 13 inches to 14 inch ones ( 185/60 R-14 Goodyear Eagle NCT 5s ) after getting nice rims for the car. I wanted to know if my Odometer and speedo need to be recaliberated after this.

My Apologies in advance if the same query has been done before and there is a thread already going on on the same topic

[nitrous]

185/60/R14 seems to be the correct upsize.
There used to be an issue with the odos in the first cars.How old is ur car?

[rishibravo]

Its 2006 model and I guess the 1.6 with OEM alloys comes with the same size, But I still wanted to confirm.

[iraghava]

Palio 1.6 OEM size was 175/65 R14

[moralfibre]

The Palio odometer is electronic, i.e. there is a sensor at the wheel which relays information to the ECU and which in turn conveys information to the speedometer. I doubt whether any recalibration is possible.

[xinome]

OK guys understandable, but what about in the case of altos, zen , swift and the indica, these are the cars i own hence the list.

but i want to know more about the alto
the OEM 12 inch rims 100 pcd and 145/80 R12 jktyre

i wanted to know will i be needing recalibration
for 14 inch alloys, i haven't decided on the tyres till now

ADVICE!

[nitrous]

Upsize correctly and dont let the OD difference go beyond 3%.
U should be doing fine.

[xinome]

Originally Posted by nitrous

Upsize correctly and dont let the OD difference go beyond 3%.
U should be doing fine.

i am totally new to this, can u elaborate
1. whats upsize
and where is beyond 3%

please explain thanks

[nitrous]

http://www.team-bhp.com/forum/tyre-a...alculator.html

[rishibravo]

Originally Posted by iraghava

Palio 1.6 OEM size was 175/65 R14

I crosschecked and ishan you are right about the 1.6 OEM size , its 175/65 R-14 . Now my question - Is 185/60 R-14 lies in the correct upsize zone or have I made a mistake. If the ODO error is within (+/-) 3-4% then I have no issues but If its more than that then something should be done about it right?

Originally Posted by moralfibre

The Palio odometer is electronic, i.e. there is a sensor at the wheel which relays information to the ECU and which in turn conveys information to the speedometer. I doubt whether any recalibration is possible.

Does that mean theres nothing I can do if there is an error

[moralfibre]

Originally Posted by rishibravo

Does that mean theres nothing I can do if there is an error

As I said, "I doubt" you can. Let me check with some people who live with these cars.

[nitrous]

I just learnt that for a lot of cars, the speedo reading is taken from the Gearbox.
Eg. Baleno!

[rishibravo]

Even if it is taken from the gearbox it must be calliberated once wrt to the OEM tyre size if I am not wrong. If you are taking the reading from a part which is not variable(gear or the wheel ) but the parameter for which you are taking the reading (speed in this case) depends upon something which can be varied (the radius of tyres in this case) then one has to caliberate the non variable part wrt to the variable part.... But i am not sure..It has been years Now I studied the basic Engineering course

[hemanthisgreat]

hi

i read in the forum that when the tires are changed from oem to modified, there occurs a speedo and odo error. can this be adjusted in the odometer.

my getz came with 155/80/r13 and i changed it to tubeless 185/60/r14
on alloys.

also since i have changed the tires, does the factory recommended psi change too.

[goandude]

IMO odos cannot be adjusted. Unless you change the gearing of the gear/worm drive driving your odo