new 20" Wheelset

[joeyvaz]

I've searched a bit, but haven't found an answer. I have a 2019 Rebel with stock suspension. No leveling kit or anything. I just upgraded the wheels to 20" Fuel Rogue with 33/12.5/20 Nitto Ridge Grapplers. No rubbing at all in case anyone was considering this setup.

My question is concerning tire pressure. My Ram door cards states 55F/45R PSI. The installer is adamant that I should run 40 PSI at all 4 corners. Tiresize.com recommends 74F/59R which confused me even more. Anyone running 33/12.5/20 or with more experience than me care to share your thoughts. I'm not towing, this is a daily drive. I just want to get the most even wear/life out of these expensive tires.

Thanks.

 

[Rick3478]

I've searched a bit, but haven't found an answer. I have a 2019 Rebel with stock suspension. No leveling kit or anything. I just upgraded the wheels to 20" Fuel Rogue with 33/12.5/20 Nitto Ridge Grapplers. No rubbing at all in case anyone was considering this setup.

My question is concerning tire pressure. My Ram door cards states 55F/45R PSI. The installer is adamant that I should run 40 PSI at all 4 corners. Tiresize.com recommends 80F/59R which confused me even more. Anyone running 33/12.5/20 or with more experience than me care to share your thoughts. I'm not towing, this is a daily drive. I just want to get the most even wear/life out of these expensive tires.

Thanks.

The screen captures you posted are for 31" tires and show 74 and 59 for two different load capacities. I don't know where you got the 80 from, but I think you are probably misusing and misreading the website. GIGO

 

[joeyvaz]

It's actually recommending 74, not 80 up front, as the screen shot shows. I've edited my original post. Thanks for pointing that out.

The first line is the type, the second line is the size 33, which is what I'm running. Last line in green is the exact size of my Nittos. So I believe I am reading the website correctly.

 

[Eighty]

Not sure where you get the idea that these are recommended pressures. These are load capacities at certain pressures (those pressures being higher than you would normally run unloaded).

 

[LaxDfns15]

Run 55/45, see how they feel. Do the chalk test to see wear at those pressures. If they feel harsh or wear in the center then lower the pressures by 5 and try again. The tires aren't going to explode the instant you set it to the "wrong" pressure. Unless of course you put them at like 10 or 100 PSI.

The website you're using is wrong about the OEM Duratracs. They're 125/122R and max load is 3640 at 80 PSI.

 

[joeyvaz]

Thanks Lax. I plan on doing that this weekend. I appreciate the info.