20" to 17" wheel swap on 2019 Ram Classic 4x4
- Thread starter tcheesie
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Wild one
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Depending on body style yes.If your 19 is a Classic with 5 bolt wheels yes,if you have a 5th gen with 6 bolt wheels no
RamDiver
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I plan to replace my summer 20" alloy rims with a set of 17" alloys whenever it's time to replace the tires.
The 17" rims with a larger profile tire provide better comfort from my experience.
You might want to consult with an online tire comparison calculator before choosing your new tires to match the circumference within 4% unless you use AlfaOBD to program the tire size.
My summer and winter tires are a different size which I correct with AlfaOBD.
When I entered 265/70R17, the difference was more than 4%.
Tire Size Comparison
Tire size comparison the easy way. Use our tire size comparison calculator to compare diameter, width, sidewall, circumference and revolutions per mile.
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GTyankee
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I am not sure about tire sizes, so i asked Discount Tire how my Michelin tires would be different from the OEM Tires.
I was told that there would be a difference of 3 Miles in a 100 miles on the Odometer.
I could only guess that that would be the same when it comes to MPH on the Speedometer ?
I was told that there would be a difference of 3 Miles in a 100 miles on the Odometer.
I could only guess that that would be the same when it comes to MPH on the Speedometer ?
RamDiver
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Using the tire calculator I linked above, you can tweak the tire sizes and it will display both the % difference in circumference and the speedo error at various speeds.
And yes, this % of error will impact the odometer and speedometer.
There are several apps that will allow you to correct this error. AlfaOBD is my preferred because of other available tweaks.
AlfaOBD can be used on several vehicles whereas a jscan license is per vehicle. AlfaOBD is not VIN locked like a jscan license.
AlfaOBD is $55, AFAIK, jscan is $24, at least that's the last price I found.
The jscan app is easier to use for wheel size adjustments and basic lighting tweaks.
It also has a more user friendly GUI, online self help and IOS or Android support.
I've no experience using jscan, only read about it.
Jscan - better than AlfaOBD?
I had never heard of Jscan before but I bought a Jeep recently (still have the Ram, both 2015 models) and needed to adjust tire size. I was introduced to Jscan which works awesome on the Jeep - it looks like it has most of the stuff that AlfaOBD has but in an easier format. And it looks like...
www.ramforum.com
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