I am going to get some new tires but am concerned which rating I should get.

265/70R17C 109Q BSW

or

265/70R17E 121/118Q BSW

These are for some Road Venture MT KL71

I was towing a 17' boat short distances, but it's for sale and that's no longer an issue. As I understand it, the C class are 6ply and the E are 10 (thus stiffer). Am i correct that the C will offer a better ride overall on the road, but the E are 'tougher' so stiffer on road but possibly more durable off? And is the 109Q rating sufficient for my jeep (unlimited X 4dr). I rarely get over 85 if that much, so the speed rating is the same as the craptacular SRAs.

 

More than likely the E's are fairly thicker than the C's. However the ride will be very harsh in comparison! I wish my Km2s were Cs and not Ds. No need to worry on the speed rating, you'll be just fine, i think Q is 100mph

 

Am I okay with the 109 load rating on the C series?

 

109 = 2271 lbs per tire at max pressure
118 = 2910 lbs per tire at max pressure

If you aren't hauling a few tons of gravel in your back seat, I wouldn't worry about the load rating...

 

Ive got those in the c rating and they are great! The e's may ride pretty hard.

 

If this is a DD Jeep, than yes for the "C" rating, the "E" will be too hard.
If this is mostly a offroad Jeep, than a "D" or "E" rating would be fine. IMHO

 

I don't drive much at all in fact and want to get to wheeling this coming spring after the dust settles from moving and my divorce and the house and all. If I put 6K on it a year that's a lot really; just grocery getting and a little about town, once a year I drive from NJ to IL and back for the holidays. I went with the E's.

Now I just need to finish armoring up underneath, move my exhaust and get the front leveling teraflex lift in and 'phase 1' will be done! Got all the baseline gear I need onboard (hi-lift, compressor, cb, straps, etc), some rubi armor cast off's, lights, etc. Might do a bit of basic upgrading to the shocks and springs, but for now no major lift or bigger tires/rims.

 

You might find this usefull

Most radial passenger tires have one or two body plies, and light truck tires, even those with heavy duty ratings (10-, 12- or 14-ply rated), actually have only two or three fabric body plies, or one steel ply.

So remember that tires are PLY rated..This doesn't mean that they actually have that many plys..The C, D and E ratings refer to the tires load carrying capacity base on the amount of Air pressue they can maintain..
The E rated tire will hold a higher air pressure and accordingly it will hold more weight.

So don't afraid of the E-rated tires..Just don't run them at maximum air pressure.

 

This is a fine solution for ride quality, but then you start having to deal with uneven tread wear and short tire life from running pressures too low on the road.

I'd say get the "C" tire.