3.92 gears with 33” or 34” Tires

[ColoradoCub]

Has anyone with 3.92 gears that has gone with taller tires seen a significant change in highway RPMS’s?

 

[James1414d]

Speedo will be off, but not much else. I have 35's on mine and it performs quite well. I'm probably 50-75 rpm lower then stock at 65mph I'd guess. Plenty of HP/torque to handle it.

 

[ColoradoCub]

Thanks for responding, theoretically by increasing the tire size you are bringing the gear ratio down too. I just wondered how much anyone had actually noticed it. I’m not really concerned with the speedo being off just the change in RPMS.

 

[Brisoup1]

Can you have a speedo re-flash for it to read correctly when using larger tires?