Puma/D3 Speedo

[Rick Fischer]

Finally got rid of the 265 70s MTZs. I can now listen to radio at 100kph.

However, going back to 245 75s rather than 235s I find that the speedo is now 10% too slow; ie 110 indicated for 100 actual (gps). (similar down at 60). The 265s were only a couple of percent slow. The OEM 235s must be outrageous if the speedo in my SVX hasn't been "adjusted".

Question - Can the Puma/D3 speedos be adjusted digitally with "dealer" box?

cheers

RF

[Psimpson7]

The OEM 235s must be outrageous if the speedo in my SVX hasn't been "adjusted".




Why? the standard 235's are an 85 profile.....

they measure up theoretically at 31.75" in diamater

265/75's are nigh on the same overall height too at 31.65".

Your 245/75's are the ones that are miles out... they are only theoretically a 30.5" tyre.. No wonder the speedo is out...

As for adjusting the speedo, ask the dealer.

[Tombie]

What the heck did you go to that size for?

You've wrecked your:
Gearing
Speed
Ground clearance..

[Rick Fischer]

Ahhh! had four STs - didn't check rolling dia.

Looks like an "assume" moment.

265 70 was TOO big, was rubbing on rear spring towers around town, as well as making too much MTZ noise.