algin5109
Well-Known Member
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- 152
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- Richland N.J.
Looking at some duratecs. Either 305 70 16 or 315 75 16 on stock rims. 305 a little wider but 315 a hair taller. Anybody have this decision to make and what u end up with.
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Tire sizes
- Thread starter algin5109
- Start date
I went with 305/70R16 KM2's first with a 285/75R16 spare due to loss of ground clearance with the spare mounted under the bed on the H3T. I found that when I started doing trails with H4O that almost everybody was on 315/75R16's and I was the most ground clearance challenged one in the group. It is no fun being the one having trouble getting over obstacles and holding up the group. So, after I got the ThorParts rear bumper and spare gate I graduated to Cooper STT 315/75R16 and I have no regrets. The 35's look better and perform better off road, although they do rub the front anti-sway bar at the steering wheel stops.
algin5109
Well-Known Member
- Messages
- 152
- Location
- Richland N.J.
I knew the 305 was a little smallerbut I guess that could make a difference. Thanks for the info
Using the BFG KM2 as an example the 305/70R16 has a diameter of 33.1" and a section width of 12.2" whereas the 315/75R16 has a diameter of 34.8" and a section width of 12.3". So the 305's are almost the same width but 1.7" smaller diameter. So the 315/75R16 will increase your ground clearance by about 0.85". This doesn't sound like much but the stock H3 has 9.1" of ground clearance on 33" tires, so 35" tires provide almost a 10% increase in ground clearance.
algin5109
Well-Known Member
- Messages
- 152
- Location
- Richland N.J.
Just ordered 5 duratracs 315 75 16 . Can't wait
cbetts
NERD!!!
- Messages
- 3,188
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- Rancho Palos Verdes, CA
I had concerns running a larger tire than stock (33" on the adventure package) since I am running a manual transmission. I didn't want to burn clutches out on a regular bassis. but . . . I did find myslef hanging up on more obstacles than most since just about everyone in the SoCal group runs 35" tires. I bit the bullet and got 35" KM2s (315/75R16). I must say this was probably the best upgrade my truck got for wheeling! On the street, well . . . . my gas mileage dropped and I down shift more on hills. But still, I prefer the 35" tires.