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Changing to super singles

I am thinking of changing to super singles from lopro 24.5. I have a C-12 ten speed 3.73. I rarely run over 60. 58 = 1300 rpm.

Local dealer quoted a price of $4840 after $960 alcoa rebate and buy my wheels $600.

Is that a decent price?

Dealer recommened the 455/55 22.5.

Is there a reason I should not consider the 445/50 22.5?

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That is for XOne XDA energy

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I think that's a reasonable price but I'd run the numbers versus the M710 Ecopias. I know personally, I get such a large discount on tires through SNI that the XOne's will never pay for themselves.

Not sure on the tire size question, I'd ask the dealer why they made the recommendation.

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What super singles are you getting? A lot of the wide-based singles have horrible rolling resistance. The only ones I've seen worth switching to are the Michelin XDA XOne.

The new Bridgestone M710 Ecopia tires have a very close rolling resistance to the XOne tires. I ran them through Michelin's savings calculator and going to the XOne only has an $800 savings based on 7.4 mpg @ 120k miles a year.

I know that's still $800 but considering the cost difference, especially for me since I get Schneider pricing on tires, it doesn't make sense to me to convert.

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The dealer is suggesting the 455s over the 445s probably because they're taller and won't raise your rpm as much. Keep in mind that the 455 is a much less popular size and you might be in trouble if you blew one. Plus the 445 has lower rolling resistance.

Without doing any math I think you'll be around 1400-1450rpm with the 445s.

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Michelin doesn't make the 455 model anymore just the 445

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I agree, don't get the 455s, I don't know where you run, but in rural areas like South Dakota, I could only find 1 tire, a 445 Bridgestone trailer wide single tire in a 100 mile radius last time I had tire trouble there. A 455 is non existant in some areas. With your engine, gears, and driving speed, the 445 is the perfect choice! I went back to duals because of my 50% South Dakota mileage. I gave up .2 mpg but tires are much less expensive, and more available where I run.

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With the rear ratio you have, I am not sure going to low pro wide based is going to be any benefit. As was stated, your engine rpms are going to go up somewhat. At 60 you would be at 1400 rpm, at 58 you would be at 1350 rpm. Now, that may not be that bad, in that you are running a C12 and not a C15. The C12 does better at a higher rpm compared to a C15. One thing for certain, it may be an expensive test to find out if it works, and even if it is beneficial, there may be a long ROI on that.

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I'm needing tires anyway and I want to loose the 24.5's

My math shows about a 45 rpm increase.

thanks for the input. Going to talk to the tire dealer Monday

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Michelin was offering a rebate that made the wheels free when you purchased 4 new XOne tires. They also were offering a payment plan to do it. Michelin advantage price for XOne tires are around $1100/each.

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Ordered them 12/10 getting the 445's Dealer called today 12/11 says they will be shipping 12/19. Thanks for all the info

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I have a 10 speed with 3.73's and run wide singles on it! I too rarely cruise above 60MPH This setup has hit 9.0 MPG on paper (not IFTA). I don't have a C-12 rather a Detroit 12.7 in a 99 KW. Get Michelin XONE XDA ENERGY tires! Awesome ride.

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Glad to hear. Next goal is 8mpg. Right now at 7.2 lifetime.

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Ken will be eternally grateful.
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