Good Sam Club Open Roads Forum: Tow Vehicles: SRW vs DRW
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 > SRW vs DRW

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wing_zealot

East of the Mississippi

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Posted: 05/15/21 06:05am Link  |  Quote  |  Print  |  Notify Moderator

All else being equal - Until the tires lose traction, braking is solely controlled by the area of the pad and the pressure applied by the caliper

fj12ryder

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Posted: 05/15/21 07:42am Link  |  Quote  |  Print  |  Notify Moderator

If you have more contact surface, you'll have more friction/braking. That's why race cars have very wide tires: bigger tires=better grip.


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Mike134

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Posted: 05/15/21 07:48am Link  |  Quote  |  Print  |  Notify Moderator

fj12ryder wrote:

If you have more contact surface, you'll have more friction/braking. That's why race cars have very wide tires: bigger tires=better grip.


Yep!! I can tell you paid attention in your HS physics class.


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brandon

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Posted: 05/15/21 08:15am Link  |  Quote  |  Print  |  Notify Moderator

I cant say that I can compare SRW to DRW braking characteristics as ive only ever towed heavy with a dually or our semi for the business. I can say that my 2015 cummins pulled and stopped night and day compared to our 07 but that's to be expected. I can also attest that our cummins pulled and handled our rigs better than my 2015 gmc dually. Id use our Kenworth but that's REALLY not family friendly.

Essentially just keeping an eye out for a lower KM ram 3500 srw, mega cab would be nice but I also haven't towed with a short box I understand that has his own set of issues. With the cost of new trucks now-a-days I wont ever buy a brand new one off the lot again. At 93,000$ for our 2015 I just about puked. My father inlaw just dropped that SAME number last week on a 2021 GMC AT4 3/4 ton.... you cant be serious.


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Grit dog

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Posted: 05/15/21 10:21am Link  |  Quote  |  Print  |  Notify Moderator

Now that we’ve established that, the Reason for the Ops truck selection should not be braking power.
If he really has that light of pin weight , that is also not part of the equation.
If the setup tows nice and steady then a srw will do fine.
Of all things, the sheer length and the fact it’s doubles, the stability of a dually I have to believe would be welcome. Whether it’s necessary, is subjective.


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Cummins12V98

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Posted: 05/15/21 10:52am Link  |  Quote  |  Print  |  Notify Moderator

fj12ryder wrote:

If you have more contact surface, you'll have more friction/braking. That's why race cars have very wide tires: bigger tires=better grip.


The contact patch width of my skinny rear tires combined is not much wider than modern 3500 srw tires.


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Cummins12V98

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Posted: 05/15/21 10:55am Link  |  Quote  |  Print  |  Notify Moderator

"At 93,000$ for our 2015 I just about puked."

Are you in Canada??? CUZ My fully loaded Longhorn was 63k in 2015.

Flashman

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Posted: 05/15/21 01:05pm Link  |  Quote  |  Print  |  Notify Moderator

Mike134 wrote:

fj12ryder wrote:

If you have more contact surface, you'll have more friction/braking. That's why race cars have very wide tires: bigger tires=better grip.


Yep!! I can tell you paid attention in your HS physics class.


Consider a train - very small contact surface and pulling more than any RV. It is psi on the contact patch - the larger the patch the less PSI if the weight is the same.

fj12ryder

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Posted: 05/15/21 03:04pm Link  |  Quote  |  Print  |  Notify Moderator

Flashman wrote:

Mike134 wrote:

fj12ryder wrote:

If you have more contact surface, you'll have more friction/braking. That's why race cars have very wide tires: bigger tires=better grip.


Yep!! I can tell you paid attention in your HS physics class.


Consider a train - very small contact surface and pulling more than any RV. It is psi on the contact patch - the larger the patch the less PSI if the weight is the same.
Now if that were true, race cars and dragsters would have very skinny tires. But they don't, why do you suppose that is?

Flashman

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Posted: 05/15/21 03:11pm Link  |  Quote  |  Print  |  Notify Moderator

fj12ryder wrote:

Flashman wrote:

Mike134 wrote:

fj12ryder wrote:

If you have more contact surface, you'll have more friction/braking. That's why race cars have very wide tires: bigger tires=better grip.


Yep!! I can tell you paid attention in your HS physics class.


Consider a train - very small contact surface and pulling more than any RV. It is psi on the contact patch - the larger the patch the less PSI if the weight is the same.
Now if that were true, race cars and dragsters would have very skinny tires. But they don't, why do you suppose that is?


Don't know.

But when trying for traction off road a skinny tire is better in many situations. If one wants to float as opposed to digging in then wide tires are better. If one wants to dig down to traction the thin tire is better.

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