The AUSubaru.com.au Forums

gday.

um, yeah just speculating whether or not it COULD BE possible to have two speedometers:

one for normal tyres;
one for bigger tyres.

It'd be safer if i wanted to change from bigger tyres to normal tyres, ya know?

if not, who re-calibrates speedometers? how is it done? (not that I plan on doing it myself. Probably end up reading out 30km/h doin 80. thatd go down well)

If you were going to that much effort I think I'd get a speedo thats fed from an electronic pulse, attach a hall effect sensor to the end of your existing speedo cable and have 2 switchable configurations, not sure exactly how feasibale that is, i kinda just pulled it out of my...err..head

Jordan.

tis a point of discussion though, innit? Your idea could probably work.

Grab a GPS and see how much your acttualy out before spending money..

Just my 1.95c

Matt

There is (was?) a mob in Perth somehwere that made small gearboxes to adjust a speedo - they sat in line between the gearbox and the speedo head.

Bit too much hard work for me though - i just knock 10% off the speed im doing and that works for me.

wait... if your speedo says 110km/h... if you knocked off ten percent itd be 99km/h. you do more with larger tyres. do you mean you add ten percent, and thats what you're doing? so 100km/h is 110km/h?

Depends how you look at it.. but yeah...

ie

Actual 100kph = Speedo 90kph
Actual 80kph = Speedo 72kph

better still, I got a roadangel EVO which sits on the dash with inch high , highly accurate gps speedo - bonus being all the road sense software...red/speed/van speed detection locations, school zones, railway x ings , towns, keep points on licence and money in ya pocket if you obey it !! and if you can import the radar detctor that plugs in the back, well....

HOW MUCH and where?

Just get a gps and put new marks over the old ones with a red texta or something, so when you are using big tires follow the red marks.

Roadangel EVO

Never heard of them before, but look like a really cool idea. I'd probably buy one if they could be connected to a PDA with gps navigation software loaded in.

Marks 4WD have speedo adjustment devices. To suit mechanical and electronic units. I have the electric one on a Landcruiser and it works great. It has a switch on it so you can run two different size tyres and both are adjustable. I have mine set up to suit 33" and 37" tyres.

best deal for roadangel seems to be if nsw , nrma members 250 plus postage.

i found a nrma link at http://www.roadangel.com.au to see the offer but bought it at David Jones of all places to get their price match garrantee ( forgot to say i pissed off nrma ten years ago and say postage too) so got it for $250