Super Singles
Anybody running super singles on their class A??? For those of you unfamiliar with super singles they are a single WIDE tire/rim that replaces the duals on the rear axle(s) seen on some of the truc...
Forum Discussion
Hey everybody, I'm the person that has personally driven about 100,000 miles in my class a motorhome and super singles.
Why did I buy them? Well when I bought them I was on the quest for maximum fuel economy because at that time Fuell was over four dollars a gallon.
What were the benefits?
Lower rolling resistance, Wider track than duals. (Yes the mathematical width is wider than duals, even though the outer dual sticks out further), better rear brake drum cooling as its not completely engulfed in the inner rim, great traction, smoother ride...
Drawbacks?
You need to buy new rims.
The sale of my aluminum dual rim paid most of the single rim cost, and the super single was slightly less expensive than two rear tires.
Would I do it again?
Absolutely! I just purchased a 2009 Newmar Allstar that has 10 year old XRV's on it and they frankly are much worse on the snow than the super single was on my Winnebago that I just sold (with a new set of tires...)
So count all the pennies you want, I like them and will use them on my new coach.
At $2 a gallon it won't save me as much as it did back at $4, but I like them.
As for fuel economy - over the 9 years I had my Winnebago - I started out in the 7-7.5mog range and sold it on a 3 year running average of 8.89mpg.
Part of that was the tires, part was all the synthetic fluids, part was driving habits.
I would say that at least 0.5mpg was directly due to the tires, if not more.
On my Newmar - I will run my first trip with the old XRV's and then buy all new tires - so ill have another sample to share.
If you read up on MPG and your coach -- below 50mph the rolling resistance is the single largest contribution to fuel use, and above 50mph its wind resistance.
Why did I buy them? Well when I bought them I was on the quest for maximum fuel economy because at that time Fuell was over four dollars a gallon.
What were the benefits?
Lower rolling resistance, Wider track than duals. (Yes the mathematical width is wider than duals, even though the outer dual sticks out further), better rear brake drum cooling as its not completely engulfed in the inner rim, great traction, smoother ride...
Drawbacks?
You need to buy new rims.
The sale of my aluminum dual rim paid most of the single rim cost, and the super single was slightly less expensive than two rear tires.
Would I do it again?
Absolutely! I just purchased a 2009 Newmar Allstar that has 10 year old XRV's on it and they frankly are much worse on the snow than the super single was on my Winnebago that I just sold (with a new set of tires...)
So count all the pennies you want, I like them and will use them on my new coach.
At $2 a gallon it won't save me as much as it did back at $4, but I like them.
As for fuel economy - over the 9 years I had my Winnebago - I started out in the 7-7.5mog range and sold it on a 3 year running average of 8.89mpg.
Part of that was the tires, part was all the synthetic fluids, part was driving habits.
I would say that at least 0.5mpg was directly due to the tires, if not more.
On my Newmar - I will run my first trip with the old XRV's and then buy all new tires - so ill have another sample to share.
If you read up on MPG and your coach -- below 50mph the rolling resistance is the single largest contribution to fuel use, and above 50mph its wind resistance.
