Jump to content

Recommended Posts

Posted

Evening all ,

Just picked up my 2020 2500 Duramax W/T and I’ve gotta get rid of the stock 17’’ wheels . Looking at 18 inch with 285/65-18 . I can’t get a straight answer from anyone if this will cause transmissions or Speedo issues ? Also clearance . 

Posted
53 minutes ago, Oliver15 said:

Evening all ,

Just picked up my 2020 2500 Duramax W/T and I’ve gotta get rid of the stock 17’’ wheels . Looking at 18 inch with 285/65-18 . I can’t get a straight answer from anyone if this will cause transmissions or Speedo issues ? Also clearance . 

Welcome to the site.

 

285 65 18 = 32.59 for diameter, with a 7.29 sidewall.

 

What size are your current 17's?

Posted
26 minutes ago, CamGTP said:

Plug you tire size information into here and you will have the answer to your question.

 

https://tiresize.com/calculator/

 

People change tire sizes all the time without doing anything to the computer.

Thanks! I was just looking at that actually. I didn’t want my tires sticking outside the body so determine offset will be next . I believe stock is 44mm

Posted
Just now, Oliver15 said:

Thanks! I was just looking at that actually. I didn’t want my tires sticking outside the body so determine offset will be next . I believe stock is 44mm

 

14 minutes ago, JimCost2014 said:

Welcome to the site.

 

 

285 65 18 = 32.59 for diameter, with a 7.29 sidewall.

 

What size are your current 17's?

245/75-17 sir 

Posted
9 minutes ago, Oliver15 said:

Thanks ! 245/75-17

You are very welcome.

 

245 75 17 = 31.47 diameter, with a 7.23 sidewall.

 

265 65 18  puts you at 31.56 diameter, and a 6.78 sidewall.

Posted
14 minutes ago, JimCost2014 said:

You are very welcome.

 

245 75 17 = 31.47 diameter, with a 7.23 sidewall.

 

265 65 18  puts you at 31.56 diameter, and a 6.78 sidewall.

New tire will be 285/65-18 .

Posted
2 minutes ago, Oliver15 said:

New tire will be 285/65-18 .

Now I’m establishing a good offset . I wanna bring the tires out just a tad . The stock 17s sit in a bit making the stance awful .

Posted
1 hour ago, Oliver15 said:

New tire will be 285/65-18 .

Dealer should be able to calibrate speedo, no idea on if the tires will rub, I am out of information. 

Posted

Spoke with my dealer this morning and they can reprogram for any size that was an option from factory. So I’ll be goin gin with 20 inch wheels I believe. Thanks for all the help . 

Posted
1 hour ago, Oliver15 said:

Spoke with my dealer this morning and they can reprogram for any size that was an option from factory. So I’ll be goin gin with 20 inch wheels I believe. Thanks for all the help . 

It's not just the wheel size but the tire size option.  It has to be an o.d. tire size that was an option on that vehicle and not just a 20" wheel with a big tire that wouldn't have come on that truck. You're not calibrating the wheel to speedo but overall diamater of the tire to speedo. 

Posted
20 minutes ago, mafd2 said:

It's not just the wheel size but the tire size option.  It has to be an o.d. tire size that was an option on that vehicle and not just a 20" wheel with a big tire that wouldn't have come on that truck. You're not calibrating the wheel to speedo but overall diamater of the tire to speedo. 

Yes . I’m choosing a stock tire option as well. 275/65-20

  • Like 1

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Latest Articles

  • Posts

    • Paid $2.72 for E85 today.
    • Welcome back! No, it definitely doesn't pass the sniff test. Even "ceasefire" needs an alternative definition these days.    $5.29 at Kroger today
    • That makes sense, and I think you are describing the real product problem. Capturing data is the easy part. If the owner or technician has to manually dig through five minutes of millisecond-level logs, the product has already failed. The device would be at the ECM harness, not at the OBD port, so I agree that data retrieval and event marking need to be thought through carefully. The way I am thinking about the architecture is: The recorder itself should not depend on a phone, app, Bluetooth, Wi-Fi, or cloud connection to capture the event. It should always keep a local rolling buffer and lock the event locally. A button, phone app, or small cabin device would only act as an event marker. If the driver feels a stumble and presses the button 10–30 seconds later, the pre-buffer has to already contain the useful data. For data retrieval, the practical options would be a sealed service USB lead, Wi-Fi download, or a phone/cabin companion device. I would not expect the owner to remove the ECM-side module or work with raw files directly. The cloud or AI side would be for interpretation, not for capturing the event. The truck may have no connection when the issue happens, so the evidence has to be saved locally first. After that, cloud processing could help decode the data, compare it against baselines, and generate a readable report. For the first version, I would keep the automatic triggers conservative and objective: driver event marker bus-off error passive voltage drop / brownout device reset FIFO or queue overflow a normally periodic message disappearing side-to-side communication mismatch, if the topology supports that For “learning normal,” I agree with your point, but I would not want to overclaim it as automatic root-cause diagnosis at first. A realistic first step would be learned baseline comparison for that specific vehicle and operating condition. For example, a value would only be compared against similar conditions: RPM range load / MAP throttle position gear / vehicle speed coolant and oil temperature battery voltage AFM/DFM state, if decoded and validated Then the report could flag things like: this periodic message disappeared compared with its normal timing this value deviated from this vehicle’s normal range under similar conditions the same abnormal pattern repeated after the same type of event the anomaly occurred together with voltage, oil-pressure, misfire, or communication changes But I would still call that “abnormal pattern detected,” not “replace this part,” unless there is enough validated repair data behind it. So the intended product would not be “here is a huge log.” It would need to be an event package: what triggered the capture how much pre/post data was preserved what changed before and after the event whether the device itself reset, overflowed, or saw a bus error selected graphs around the event raw data only as supporting evidence From your perspective, what would make this kind of report useful instead of just another datalog? For example: What are the top 5 parameters or events you would want highlighted first? Would you trust a learned baseline for that specific vehicle, or would you prefer fixed thresholds? How much false-positive flagging would be acceptable before you stopped looking at the reports? What would a one-page report need to show for an independent shop to take it seriously? For misfire, AFM/DFM, oil pressure, or U-code complaints, what would you want the tool to flag automatically?
    • 2024 Silverado 2500 HD LTZ grille no camera Parts list   84603331 84913656 84913657 84913654 84913655 84911567 84911568 85646092 85646093 85797921 85797922   11570637  x10-15   grille/bumper bolts 11546500  x10      grille clips 11571006  x10      push/retainer clips 11546454  x6       nut retainers 11611609  x6       M5 bolts 11610700  x6       molding/trim retainers
    • And use RA's 5% discount code if you buy from them.  google for the code, one is always available.
  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...