My tires make a lot of noise between 10 and 55 mph. They’re KO2s, and everyone says they’re great, but my experience hasn’t been the same. An online calculator says I should run them at 41 PSI, but that seems way too high. What do you all think?
I ran KO2s anywhere from 32 to 42 PSI, and they felt pretty much the same across that range. The real issue is they’re almost impossible to balance properly, so they’ll always feel rough on the highway. After two sets, I switched to Falken Wildpeak AT4s. They’re better in every way except snow. KO2s do better in powdery snow, but the Wildpeaks are great in thicker, wet snow.
@Harlan
KO2s aren’t loud at all! I’ve had three sets, one after another, and they don’t make any noise. I think you’re wrong!
I have load range E and keep them at 40 PSI. When I had load range F, I ran them at 35. I used to have BFGs on another truck and didn’t like them, so I switched to something else. Some people swear by them, but they’re not for me.
I run mine at 40 PSI, and I’m on my second set. The first set lasted around 80,000 miles.
Fin said:
I run mine at 40 PSI, and I’m on my second set. The first set lasted around 80,000 miles.
I’ll try 40 PSI today and see if it helps.
Fin said:
I run mine at 40 PSI, and I’m on my second set. The first set lasted around 80,000 miles.
I’ll try 40 PSI today and see if it helps.
Just keep in mind, they’re naturally loud. Not much you can do about it unless you switch them out.
I keep mine at 35 PSI for unloaded driving. They’re load range E.
If they’re true LT tires, you might need to go up to the high 40s. My LT Michelins need 50 PSI to match stock loading ratings. Lower pressures can help with comfort, but keep an eye on tread wear. The numbers on the door are for stock tires, so use a calculator for recommendations.
@Fallon
They are true LT. You can barely see it in the picture, but it’s there.
40 PSI for normal driving. If you’re carrying heavy loads over 7,500 lbs, go for 60–75 PSI.
Taryn said:
40 PSI for normal driving. If you’re carrying heavy loads over 7,500 lbs, go for 60–75 PSI.
I’ll try this today. Thanks for the advice!
You should try the chalk test.
I just got K3s in load range E. Discount Tire recommended 45 PSI in winter and 42 in summer because of the thicker tire walls.
The extra noise could be uneven wear. How many miles are on them? They look like they’re starting to step in the wear pattern.
Adley said:
The extra noise could be uneven wear. How many miles are on them? They look like they’re starting to step in the wear pattern.
They’ve been rotated and balanced regularly. They’re at about 20,000 miles now. I just bought the truck, and it sounds like I need to try a higher PSI.
@Vic
From the wear, it looks like they’ve been rolling unevenly. You should rotate them again. If you zoom in, you can see the lugs are slightly slanted.
Adley said:
@Vic
From the wear, it looks like they’ve been rolling unevenly. You should rotate them again. If you zoom in, you can see the lugs are slightly slanted.
I see what you mean. I’ll be ordering new tires next week and keeping these for light off-road use. I mostly drive on pavement and gravel, so I don’t need them often.
@Vic
I’m in the same situation. I switched to highway tires for comfort and less noise. They still handle light off-roading just fine.
I keep mine at 30 in the front and 32 in the back.