Speedo Gear change with 33s ?

[goofball mexdsk]

OK for those of you that have put 33s on your RAMs I have 2 questions:
1- Did you install a Lift to fit the 33s?
2- Did you change the spedometer gear so it reads correctly?

I have 2001 Qcab with 16" wheels, do not remember the tire size.
TIA

[redrider]

I have a 2001 Quadcab with 17in. alloys.
It has 275/70 17's. They are a little over 32 inches, so i doubt they would affect the speedo very much.

[Jeepstuff]

I have the 17" alloys with 33" Pro Comp M/T,s no lift with the offroad package, the speedo is right on the hieght of the stock tires being just a bit smaller about 1", But that is with 4.11 gears, I don't know what the standerd package trucks run for gears but that would make a differance...HTH..

[jestermebetter]

have the 01, off road but changed tires out to 35, bfg mtr and 16.5x12.5 wheels my speedo is off by 5-7mph at 60mph. less than the speed supposed to be.

[goofball mexdsk]

SO I should not have any trouble putting on the 305/70R16 (33s) BFG MTs then with out a lift.
How about 315/70R16 (35s) BFG MTs would I need a lift for those? If so how big would 2 inch be enough?

Thanks