1989toy4wd

I have a 2 in torsion bar crank and blocks out back (which are going to be replaced with shackles and bj spacers) I know I can fit 33 10.5s on there stock but with the extra 2 inches, could I fit 12.50s??

MudHippy

The size difference would be 2" of extra width. So on the same size rims the tire will stick out approx. 1" wider on each side of the rim.

Extra lift isn't going to help, or hinder, you concerning the width of the tires you can fit on your truck. Though, due to the wider stance and higher load handling ability you'll gain if you add tread width, wider tires can be a stabilizing factor to aid against rollover and improve cornering. Something to consider when lifted, or not. Also, there are some other ways to widen just your stance (track width) w/o wide tires. Chiefly, rims or wheel spacers.

The width of tire you want to go with should depend on 3 things, really. Looks/Terrain/Handling. Looks is self explanatory. Terrain that requires wider tires include mud, sand, snow. You can benefit from the floatation effect produced by wide tires there. Handling will also be better on-road with wider tires. More traction and lateral stability, period.(Or on any hard flat surface like rock, concrete, etc., extra width will be beneficial for grip and keeping the vehicle upright).

1989toy4wd

Do you think that i should just go with the 10.50s then!? Cause i like the look of the 12.5s but, if its going to put more strain on my drivetrain, then I am goign to wait, cause i am not going to regear untill i get enough money for the regear and both lockers!

MudHippy

If the only downside your worried about by adding 2" of tread width is the extra strain on your drivetrain, I would say go wider. The sturdiness of the Toyota 4wd drivetrain, even the IFS components, won't be overburdened by the grip of a wider tire. The possible reduction of wheelspin would provide less stress actually.

Regearing would not be needed for a wider tire, only taller. The tire is essentially a GEAR that contacts the earth. If you alter it's height size up you need to gear down(higher numerically) to compensate, if go smaller in height you need to gear up(lower numerically). To keep it nearest to stock gearing, if that's your goal.