I got the wrong tires on the new truck

[Mike]

I was digging through the spec sheet this week, and realized that I totally overlooked what model of Michelin's I got for my drives, and found out that it is too late to change.

The tire I wanted was the X-Line Energy D, though they now have a D+ which is supposed to be even more fuel-efficient. Being a brand new tire model, not sure I want to risk it, so best to let others test that tire and go with the D.

Instead, the tires were the XDN2. These have a little higher rolling resistance. On the plus side, they have a higher life expectancy and better traction in bad weather.

In the end, factoring in a slightly higher cost for the X-Line Energy D, and higher life for the XDN, it looks like I am potentially losing just over $600/year with the XDN2's. That said, a decent portion of that rolling resistance is caused by the deeper tread on the XDN2, so that cost should drop over time as the tires wear down. I get that latter part from other's experiences with the tires, stating they ended up with virtually the same MPG as they had with the Energy D's after running the tires for a while.

I guess time will tell, because it is doubtful I will be making a change. To do so, I have to see what the local tire dealer will do in regards of buying takeoffs (which will cost me money) and the labor of mounting a new set of tires.

The XDN2 is not a smartway verified tire, but if I am reading the CARB communist manifesto properly, you only need smartway tires on the tractor if it is something like 2014 or older.

Anyhow, from Michelins calculator for the two tires, I am attaching a PDF

 

[Mike]

As for tire pressure on the XDN2, looks to be right in line with the X-Line Energy D, calling for 75-80 PSI. I'm still on the fence about running pressures that low, but the folks at Michelin seem to stand behind it as well.

Find the right tire for your business | MICHELIN COMMERCIAL TIRES

Michelin offers a wide range of tires and solutions adapted for your business or fleet needs.

www.michelintruck.com

 

[Hammer166]

Isn't the XDN the winter tread? Lots of siping?

 

[Duck]

That doesn't make any sense.

A tire is basically a donut shaped bag of compressed air, supporting a shitload of weight on it's outer edge. It's the air pressure that makes it hard.

Freight trains can move a ton of freight 400 miles on a single gallon of diesel fuel partly because their wheels are solid steel and therefore harder than any rubber tire can be.

So how can they get LESS rolling resistance with a truck tire by using less air, therefore making them softer at the bottom?

 

[gearjammer]

As for tire pressure on the XDN2, looks to be right in line with the X-Line Energy D, calling for 75-80 PSI. I'm still on the fence about running pressures that low, but the folks at Michelin seem to stand behind it as well.

Find the right tire for your business | MICHELIN COMMERCIAL TIRES

Michelin offers a wide range of tires and solutions adapted for your business or fleet needs.

www.michelintruck.com

being michelin screwing me over on their warranty years ago I would wish any of them on anyone

 

[Mike]

That doesn't make any sense.

A tire is basically a donut shaped bag of compressed air, supporting a shitload of weight on it's outer edge. It's the air pressure that makes it hard.

Freight trains can move a ton of freight 400 miles on a single gallon of diesel fuel partly because their wheels are solid steel and therefore harder than any rubber tire can be.

So how can they get LESS rolling resistance with a truck tire by using less air, therefore making them softer at the bottom?

The air pressure recommendations isn't saying they get less rolling resistance due to the air pressure. It's simply the recommended air pressure for specific weights. It's a common thought that if you inflate them higher, you will help fuel economy, but the concern is whether it comes at the cost of tire life and ride quality.

 

[Electric Chicken]

I have XDN2 recaps. Not sure if I'll buy them again but they do have more meat and wider lug gaps than the CARB slicks.

If I never get stuck the way I did on those Goodyear whatevers Pumpky ran, they'll be worth it.

 

[Rigjockey]

I was digging through the spec sheet this week, and realized that I totally overlooked what model of Michelin's I got for my drives, and found out that it is too late to change.

The tire I wanted was the X-Line Energy D, though they now have a D+ which is supposed to be even more fuel-efficient.

Is there a difference in price between the two tires?
I can understand them not wanting to exchange well used tires but, If there is a difference in price they should at least be willing to refund you the difference.

 

[Mike]

Is there a difference in price between the two tires?
I can understand them not wanting to exchange well used tires but, If there is a difference in price they should at least be willing to refund you the difference.

They will be take offs, which means they can't sell them as new, so there will be a ding there for sure. I'm waiting to see what the cost to me will be for this so I can make my final decision.

 

[Mike]

Are they 24 or 22?

22

 

[Electric Chicken]

22

Hmm.

 

[Rigjockey]

They will be take offs, which means they can't sell them as new, so there will be a ding there for sure. I'm waiting to see what the cost to me will be for this so I can make my final decision.

Well, I hope they do right by you.
There is a pretty good market out there for GOOD used tires.
One place I worked for we were told to ask the tire shop for a good matching good used tires.

 

[Electric Chicken]

I mean I could probably use some 11/R22.5 XDN2s.

I'm in PA where we have potential traction issues.

 

[Mike]

I mean I could probably use some 11/R22.5 XDN2s.

I'm in PA where we have potential traction issues.

These are low pros. Traction issues are why I am looking closely at the difference in overall cost to be sure what I want to do.

 

[Electric Chicken]

These are low pros. Traction issues are why I am looking closely at the difference in overall cost to be sure what I want to do.

Oh you have 295/75s?

 

[Mike]

Oh you have 295/75s?

275/80

 

[mndriver]

They matter

 

[Electric Chicken]

275/80

10-4.

 

[mndriver]

Running mine at 90 psi and with these winter conditions I’m still at 7.0 mpg.

I was mid 5’s a week ago when I ran roadmaster POS tires and opted to go back to the energy D tires.

In the 28 estimated months the roadmaster tires would have lasted, it would have cost me $17,000 in extra fuel.

I’m seeing 60-62 dB with these tires vs 62-64 dB with roadmaster tires.

The ride is night and day different in smooth etc.

Near as I can tell it’s a compound difference and the. The energy’s have closed shoulders.

 

[Mike]

Running mine at 90 psi and with these winter conditions I’m still at 7.0 mpg.

I was mid 5’s a week ago when I ran roadmaster POS tires and opted to go back to the energy D tires.

In the 28 estimated months the roadmaster tires would have lasted, it would have cost me $17,000 in extra fuel.

I’m seeing 60-62 dB with these tires vs 62-64 dB with roadmaster tires.

The ride is night and day different in smooth etc.

Near as I can tell it’s a compound difference and the. The energy’s have closed shoulders.


View attachment 75514

Tempted to try 80, which is still more than recommended. Actually trying to speak with someone at Michelin specifically about this.