Forum Discussion

skimopow's avatar
skimopow
Explorer
Dec 17, 2018

New user, TC Tire questions

I'm new to the forums and eagerly awaiting delivery of my Arctic Fox 811 (my first TC). I have extensively read the forums here researching this purchase and have settled on the Arctic Fox mated to a SRW F350. I will install both upper and lower stable loads as my first suspension improvement to the stock truck with a sway bar and potentially Timbrens down the road.

When it comes to tires I feel like I have a few options. I will wait until I take delivery of the TC and get a chance to both drive it and weigh it before making a tire/wheel purchase.

I see 3 legitimate options to increase tire/wheel capacity of my stock truck. OEM wheels appear to be rated at 3615# based on a rear axle rating of 7230#, tires are 3640# per tire. My rear axle weighs 3180# unloaded. Based on others AF811 weights I am guessing 4200#+ wet which puts me above the OEM ratings.

The 3 options I am considering are:

Method HD wheels rated to 4500# each mated to:

A.) Nitto Ridge Grappler 305/65/18 F 128
This tire has an F load rating but a 128 (3960#) load index

B.) Nitto Ridge Grappler 295/70/18 E 129
This tire has an E load rating but a 129 (4080#) load index

C.) Vision 19.5" wheels rated at 4500# mated to:
Michelin XDS2 245/70/19.5 H 136 (4940#)

I have read tons of opinions on 19.5" vs 18" and talked to my local tire supplier regarding this choice. I drive on logging/forest roads frequently and in the snow. Wet roads are normal here 6+ months out of the year. I have never had a need to air down my tires with my previous truck, unlikely that will be an issue with the new truck.

My questions are:
1.) Is there a benefit to the F load rated tire over the E rated tire ? Obviously, the E rated has a higher weight capacity, but is there a stiffness or robustness advantage to the F rating?

2.) The un-sprung weight of 19.5 wheels/tires is unappealing (126# vs 100# per tire/wheel) BUT from my research it appears the increased sidewall stiffness of the 19.5 is a big advantage for hauling a truck camper. Is there a huge difference between these options? Will I regret not going 19.5?

3.) Traction with the wider 18" tires will be far superior to the narrower 19.5" tires. Because I am a skier and in the snow 6 months out of the year will the 19.5" tires be a major downgrade from the OEM 275/70/18 Goodyear Wrangler Adventure tires?

I have considered keeping the OEM tires if I go 19.5 to use in the winter.

4.) Because I am very close to the OEM ratings does it make sense for me to go to 19.5 with all the disadvantages (cost, unloaded ride, etc.) ?

This community seems amazing and I have found answers here no one else could provide, hoping to glean some insight from the experienced users here!

Thanks!