Tire size
#1
Tire size
Right now I got 235/75r15 with atock ride height, I'm thinking about going up to a 31/10.5r15, I did do some searching online and I believe they should fit without any adjustments is this correct, will I lose a bunch of power, my truck is mainly used for highway driving, just want a bigger more aggressive tire if I ever need it. The truck is a 1984 pickup
#2
Registered User
iTrader: (-1)
Fit yes, allow stock turn radius and up travel probably not.
Jack up the wheel under the control arm untill the bump stops touch and measure. Clearance of the tire centerline and the pinch seam, then crank the steering fully to each side and measure clearence at the side to the frame and along the pinch.
Further verify your current tire size isn't already oversized, my badge says 225 not 235 if my memory serves me right. You might already be a half inch over if so.
I don't know the width off hand but going from 225(28.5) to 265(31.5) looks like it fits without any modifications other than adjusting the stops. Based on the clearance I see on my 4runner, but this is an assumption since my previous owners installed spacers and flattened the pinch aswell as clearenced the firewall corners for larger tires than I have now. I estimate it will accept tires over 33" now.
Jack up the wheel under the control arm untill the bump stops touch and measure. Clearance of the tire centerline and the pinch seam, then crank the steering fully to each side and measure clearence at the side to the frame and along the pinch.
Further verify your current tire size isn't already oversized, my badge says 225 not 235 if my memory serves me right. You might already be a half inch over if so.
I don't know the width off hand but going from 225(28.5) to 265(31.5) looks like it fits without any modifications other than adjusting the stops. Based on the clearance I see on my 4runner, but this is an assumption since my previous owners installed spacers and flattened the pinch aswell as clearenced the firewall corners for larger tires than I have now. I estimate it will accept tires over 33" now.
#3
Appears these should fit after the measurements you gave me, but they might rub around sharp corners.
The next question is: will I lose a bunch of power by increasing the tire to a 31x10.5
The next question is: will I lose a bunch of power by increasing the tire to a 31x10.5
#4
Registered User
#5
Registered User
iTrader: (1)
Because you have a 84-85 your turning and everything should be unaffected. There is a slight power difference but usually only on certain long shallow hills where you may need to down shift at freeway speeds. If you go wider than a 10.5 tire you could end up with rubbing and such but that can also be solved with different back spacing on your new wheels. You should get new wheels if you go wider than a 10.5 tire.
I run 31/10.5/15 BFG A/T on my stock 85 4Runner and have zero issues.
Good luck hope this helps.
I run 31/10.5/15 BFG A/T on my stock 85 4Runner and have zero issues.
Good luck hope this helps.
Last edited by thefishguy77; 01-27-2017 at 12:58 PM.