dxbjeep

I was wondering whether installing larger diameter tires would require stronger drivshafts?

I have an 09 sahara and just put 33" cooper stt's on. I was just wondering whether the extra stress could cause driveshaft failure? I know the stock ones are fairly strong, but couldnt find an answer when searching.


cheers

alabamaslinger

i dont think so brother, i run 33 inch TSL's and really dog on it, never had any problems

jeepnick

Correct me if I'm wrong but I think it depends on how much lift u have and if it's an automatic

HappyCurmudgeon

I ran 33x12.5 Cooper STT's on my stock shafts for a bit over 2 years, no issues at all. So at that tire size, I would say nope. ...Now, if you went to 40's....

My 33 Coopers measure out height wise at 32.5" installed on the stock rims at street pressure. the stock Goodyear SRA's that came on it where 32.1".

0.4 of an inch doesnt mean much in this case.

Alf1096

No you will be fine...some come from the factroy with 33's

dxbjeep

Thanks guys, just the answers I was hoping for, I thought the little difference in overall diameter between 32" and 33" shouldnt make that much difference, but the overall weight of the new tires is much greater.

robin

all of the above.

spinlock

If you are referring to the numerous driveshaft threads, bigger tires usually require a lift kit. The lift kit changes the driveshaft angle sometimes to the point where the driveshaft rubs on something like a skidplate or the DS is so large it causes binding in the stock shafts so a new shaft with CV joints is required.

Bigger tires directly stress the brakes, differential and bearings more than the DS.

rubious

x2 since u save money on drive shafts get some

dxbjeep

Not refering to the lift kit or DS angles. Im refering to the additional stresses that you mention and whether I need to upgrade any other parts, or will the stock JK differential and bearings be ok?