AlfaOBD: Change Your Tire Size To Fix Your Speedometer After Installing Bigger Tires On Your Ram!
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- Опубликовано: 5 янв 2020
- If you've installed bigger (or smaller? Eww) tires on your Ram truck, you've probably noticed the speedometer is off. It says you're going 70 MPH? You might actually be going over 75 mph...Normally you'd need to pay a bunch of cash to your dealer (assuming they even reprogram tire size) and have someone else handle this for you, but not now! It's easy to reprogram your truck to display the accurate speed after installing bigger tires.
Don't Know what AlfaOBD is? • AlfaOBD: What Is It? I...
You'll need the OBDLink MX: amzn.to/2Cvb032
Alfaobd app: amzn.to/2LuO72m
Tire size calculator: tiresize.com/calculator/
With this easy to follow tutorial, you'll have your truck programmed quickly and enjoy more accurate mpg calculation, speedometer, odometer, and maybe even better driving (the transmission will know what's going on now). 
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Man, I'm so glad you made this. I went off some written instruction off a few of the Ram forums and they left me hanging. Your video cleared it all up and now my stuff works. Thanks brother!
Nice! It’s funny, although it isnt much different just seeing it without any skipping between screenshots makes all the difference!
This worked great for my 2014 ram 3500. At first I could not get the abs light to turn off. I apparently didn’t do something right as I tried a few different times. I then took it slow and made sure I followed to a tee and it worked flawlessly. Moral of the story is it work for my 14 and when the abs wouldn’t go out, it was because of my error. Great video and thank you for sharing
Finally got around to doing this to my 2018. I put the laptop in the front seat and just start /stopped you through this and TPMS reset. Easier than I imagined. Thanks for the videos.
Fantastic!
Never knew you’d have to make ABS corrections after tire size change. Gonna save this video 👍
Thank you so much for doing this. It helped me a lot. 👍😊
Charles great video easy to follow, I did get the 4wd not available, service trailer brake, no speedo, and heavy steering. This is nothing you did wrong after letting my truck sit for a half hour it cleared its self. I have had to fine tune the size and let it sit every time. Also if you’re not getting an abs fault there is no need to run the abs reset. Hope this helps people with similar problems and thanks again for this great video.
So glad I saw this - I was freaking out. Same exact thing happened but with “AutoPark Disabled” and “Service Air Ride”. Had the heavy steering and no speedo. Let it sit 30 mins and good to go. Had to clear one engine fault but all good. Thanks for this info.
Thanks, I was wondering why I had no faults when I did mine, so I figured I didn't need to do the abs reset. Thanks again for easing my mind
Thanks Charles. Your videos are always helpful.
Glad they help!
Great vid charles..a little fast for us newbies out here...a little more explaining what and why you chose those other steps like abs,rolls...what the hell is rolls?stuff like that...not all of us out are computer wiz bangs....I think i learned more from others commenting and some questions that were not answered by you would help a bunch.
Agreed, very fast for us old school guys as well.
Awesome video man! Very helpful
I don't comment on many videos, this saved me from making a trip to the dealer. I changed the tire size and all of a sudden no speedometer check engine light and abs light. I freaked out haha. Thank you so much for the video!!
I have RAM 1500 2015 hemi so today i was trying to change the tire size with the help of alfaobd and obdlink sanner all well good except speedo meter was off by 3 km so i reprogramed the tire size to get the actual speed reading but this time some thing happened and my speedometer is now not working also i got a message that says 4wd temporarily unavailable, also note that the steering is feeling heavy now + the gear changing is delayed ..can u help?
@@pirshah330same exact thing happened to me!!! Any luck with finding out what you did wrong?
Mine never seems to let me hit start whe you select abs initialization, but I follow through with the rest of the steps and can hit start on all of them
Phenomenal dude!!! Subscribed! Now can this thing handle my 2017 Ram Rebel?
Great video. Thanks Charles.
Hey charles, Thanks for all your videos, lots of help. question, if I do this I don't need the speedometer correction tool?
Thanks.
Thanks for this video. I just changed my tires on my '14 Jeep Grand Cherokee EcoDiesel 4x4 and went from 265/50/20 to 275/55/20 KO2's and was wondering if the AlphaOBD you have does this same thing you did for the Jeep Grand Cherokee's? Could you check on your AlphaOBD and let us know please. This will make my decision into buying it since there isn't an answer on their website for this question. Thanks a million.
Hey Charles, thanks for the video. I did all the steps on my 2016 Ram 2500. After I got everything done my check engine light is now on. I ran a code check and nothing was throwing a code. Any ideas on what I might have done wrong. Thanks!
Thank-you. Great video. Question. Cofiguration log never changes the Dynamic Tire Circumference? Seems to change speedo, but not log info?? Thanks
Hey man thanks for the video. I'm have abit of trouble getting the right setting for tire speed it seem to be off by 1.5mph. Everytime I try to lower the tire size in mm it doesn't accept it and throws errors with abs, air suspension, 4wd. I have a 35x12.5R17 Toyo A/T I I. They have a the 18 inch rim listed (2684mm) that works but like I said the speed is slightly off. And when I go to abs I can start the initialization bit can run the other two you show.
Awesome video. Thanks
Hey, I follow the procedure one time but the speedometer was still off. I did went through the process again to fine tune it but now the MIL is on and the speedometer does not work. Please help
Follow up.
While I research about how to fix this (some 40 minutes) the truck reset itself. I went and test drove it and is all good and speedometer is spot on.
Thanks
great video.
I updated the tire size for my 37” nittos but it didn’t let me press “start” for the abs initialization. No ABS lights have come on. Will this become a problem?
You saved me. Thanks.
So far this is great software but I was unable to make a backup to Google drive or even open in chrome. I have made changes and everything works so far and I know what I've changed anyways and the values of original. Any format help would be appreciated though
I selected one of the preprogrammed sizes because my winters are 275/55r20, I didn't have any lights come on. Did i do something wrong?
Please make a video on how to active DRL on factory projector head lights.
Once I hit next and start I received “failed. Request not supported by the unit”. 2010 ram 2500 st diesel. Any thoughts
If I were to install the michelin defender ltx m/s 275/65r18... what do I put down as the tire circumference? TireSize says it has a circumference at 100.7", which is 2557.78mm... how will I know if the system accepts that number/nearest number? Thank you!
To adjust tire size perfectly after the initial change, If I go UP in MM it will make my speedo slow down and if I go down in MM (tire size) it will make the speedo faster right? Also do I have to change everything again, I assume so because you are changing sizes again....Thank you!
Hi great video will this work on a 2020 1500.
First, your videos are awesome. Thank you for them! So I have some questions on the capability of AlfaOBD and options of changing some things. Any chance we can chat over email or PM? Thanks!
Can you program/calibrate the two axles differently? i.e. 325's (35.4") in the rear and 35's (actually 34.8") up front? I Put on a proper lift so the upgraded control arms etc. front and back will cover geometry, and wouldn't mind getting 3/10" of factory rake back from these lift kits that net -2" Rake change by using shorter rear springs vs. how much they lift the front. Put another way, how would I account for a lesser difference, say 1/3" between front and rear, If I put on new mudders on the back and nearly bald ones of same size in the front??
I have a 21 ram 1500 5th gen. A local shop told me a PCM unlock by the dealership is necessary for speedometer calibration. Have you ran into this issue?
I'm looking for bypass cable for 2022 ram 2500. Which one would work with alfaobd?
Hi there, what if i have the rear wheels are different than the front one? I have 285/30 r21 rear
245/35 zr21 front. Could you please advise
Is there something I am doing wrong? I have plugged in 2688 and 2730 for my tire size (276/65/20). And either way, it is about 2 mph faster than actual speed. Any thoughts? My tires are not in list.
Hi Charles. I just installed the OBD linkmx + with the adapter. I managed to change the tire size to the exact speed as my GPS. the issue I have now is I've gone from 19 to 20 litres per 100km to now at 28 litres per 100 km. shouldn't my gas mileage be better? would really appreciate if you could help me with this.
I am having trouble when entering the tire size. I have a 2018 ram eco diesel and just put 295/65/20 tires on it so 2799mm circumference. When I do the manual add tire size and hit start it shows me my old size and when I hit next it goes back to the tire selection page. I hit start again and it won't do anything for a while and when I keep hitting start it brings back my old tire size. What am I doing wrong?
Following this to a T and the ABS initialization won't load so I have to skip it and go to ECU initialization. It's crazy cause I had no issue changing to 35s. But now that I'm trying to update to 37s it's not working. I'm not sure why I'm having this issue. The ABS initialization page doesn't load to give me the function to click start, the buttons remain gray and don't load up to red to click.
Mine is doin the same stays gray. Did you figure it out?
So I have a 2013 ram 2500 bighorn on 35x12.5r17 and I can’t seem to find size and get to the next step with the ABS stuff.
Speedo 3 miles under gps. Allowed me to change once. Speedo now 2 miles higher than gps. Will not allow another change. Any ideas. Only thing I notice is that Abs Initial. (Start) doesn"t do anything (shows instr. screen). Everything else seems normal. Any ideas. Thanks
Could i use the alfa with my 2020 ram longhorn
I have RAM 1500 2015 hemi so today i was trying to change the tire size with the help of alfaobd and obdlink sanner all well good except speedo meter was off by 3 km so i reprogramed the tire size to get the actual speed reading but this time some thing happened and my speedometer is now not working also i got a message that says 4wd temporarily unavailable, also note that the steering is feeling heavy now + the gear changing is delayed
I let mine sit for five minutes and when I put key back in ignition I didn’t get any faults did I just get lucky with the abs stuff I have a 15 if that matters?
Hello,
I have a 2016 with 17’s and 37’s. How would you put that in?
Does this alpha odb device have to be left plugged in all the time or can it be removed once changed are made?
Where do I find the circumference of my tire to program??
Shift points on the transmission won't be affected by tire size, the transmission shifts on engine RPM no?
Do you have to disconnect security gate way before doing this?
Anybody know why clearing rolls infomation keeps failing procedure
Will this work on a 2010 Nissan Titan Pro-4x?
hello after i do everything in driving my steering is not same before and it is harder to drive and turn
How do I determine which body control module I have?
Does this work for a Fiat 500 Abarth? Is it even an option? I went from 16s to 17s, both factory sizes, and my speedo understates now.
2017 Ram 1500 . ECU INITIALISAtion "start" option is not available. Why do you think
I need help, this is not letting me start abs initialization
Hey thanks for the video, much appreciated. Couple questions. I didn't see where you adjusted the transmission/shift points, is this done by the programmer automatically when tire size is changed? It is a bit unnerving that all these codes happen to your brand new 70K plus vehicle 😳 Are you still using this system today, have you experienced anything that would want you to warn against using now?
The trans shift points and handled by the truck-it just needs to know what size tires are on!
I’m still using it today, there are really no downsides since you can always change things back if something is messed up.
Just don’t randomly change settings lol.
@@chazpages thanks, much appreciated
Do you know how many MM it is to change 1 MPH? trying to get it 100% acurate
Is this the same procedure for 2010 3500 ram
Tried this on my 15 ram 1500 everything was the same except ABS initialization didn’t give me a start button just a list of things to do to complete it.
Fuck man, I did this on my 2016 but it won’t let me start the ABS initialization. The start button is just grey and won’t let me click it.
Did you ever get this figured out? I'm getting the same issue on my Grand Cherokee.
@@mikenigrelli did you get this figured out I'm having the same issue
@@kbraulston I did! I don’t have it in front of me, but from what I remember the first screen is just an instruction page, go on to the next step of ABS initialization and it should work.
So what size is 2714mm? Okay I was able to get it my tire size is 275/70/18 so the circumference is 2644.
I tried to follow you instructions but you rushed through and I got lost and still can't change tire size on my 2017 2500 Ram...can you help me??
Thank you for posting this.
So.. something I'm curious about .
I have a 2021 Ram 1500 Classic.
I changed my tire size using AlfaOBD, and used your video as guidance.
I successfully changed my tire size, however I did not get any errors, and reconfirmed that the size saved, and it did.
Can I expect errors at a later time ?
Also, the ABS module you displayed is different from my Ram, I do not have the "ABS ATE/CONTINENTAL"
I gave ABS Bosch, just to test, when I selected it, I started getting a flashing ABS light, I disconnected from the truck, and it went away.
Any input on this?
I just changed my tire size on my 2021 ram classic and same thing I did not get any flashing lights on my dash. I’m thinking that is supposed to be this way since other guys have mentioned same experience. Have you had any lights come on since you changed your tire size?
2021 Ram Rebel. Changed tire size to 2760mm I'm running a 325/65R18 now my parking sensors are off and won't come back on. Anyone know why or how to correct this issue.
So I’m getting 34.3inch tires and online calculator shows circ of 2733. So how are your 35s smaller?
It's not letting me do the ABS step. Can you please help. I have a 2016 ram 3500
So when I attempt to do this it says The option is currently set as: The procedure is not relevant for the control unit.
I tried doing a demo for my tires size..why is mine 2765 and yours is 2714? Thats a big difference
Will it work at Dodge Durango as well?
Charles, how do I figure out which control unit I have for my Ram 1500 classic? thanks
I just pick 2019
Yeah I tried this today no luck the tires were switched but I can't get the ABS to reset it won't even allow me to hit the start button to do the update of the ABS I talked to a guy at Dodge and they said no one's allowed to do that anymore and I'm going to have to buy $200 module now from any Aev , I don't know if anybody has a fix I have 37-inch tires and I guess I'm not going to be able to drive my truck till I get the module let's supposed Plug & Play the EPA is not even allowing people to mess with their Tire in the truck anymore
Hey is there an option in the software to have power mirrors fold on ignition off
No, only active systems like Tazer can do this. 2023 is rumored to have it with a new towing mirror.
Great Videos!
I have a 2016 Ram PW with Toyo MT 35s and decided to use your setup to adjust tire pressure for off-roading. However, I can’t get any dealership in my area (Olympia, WA) to give me MY key code, even though I have the title and registration...
Is there another dealer you can swing by? It's annoying how inconsistent the dealers are about this...
Yeah I had to call around to a couple dealerships to get permission. Then go and get it with my license and registration
Once you get code what do you do with it ?
So I have nexen roadian 315/70R17s and there's no setting for a 315 but I picked 2560mm and it's off by one mph, am I close enough and is that going to cause any transmission issues?
It shouldn’t cause any problem, as the tires wear down it will change a little too. Heck 1mph is closer than what most vehicles accuracy is
When running static ecu it says coding data not received and then fails
If you have the Edge Pulsar which also allows you to change tire size, which one trumps the other??
Probably whichever was used last. They probably both program in the same/similar way as far as the computer is concerned.
@charles pages
Thanks! Nicely done video. I have a 2017 2500 and just bought AlfaOBD v2.1.9.4. Sadly it does not have the ABS module ATE/Continental option and AlfaOBD won't connect to the ABS Bosch/Teves/TRW/ PowerNet MY2013-18 PowerNet option. Any thoughts on how to get the right module?
What? no answer...
Same no Ate/continental option 2013 Ram 2500 4x4 5.7hemi
How do you know which Power Net to use under body computer. I saw another video which showed about four different versions for 2019 RAM 1500. Does the unit tell you or is that something you need to find out prior to? And if so, how?
dt new body
2022 RAM, added 33.1 inch tires, up from 31 in (2462 mm). With alfaobd, do you want the speedo to match the actual speed clocked with a GPS app? Or, just use actual circumference of new tires, which is 2642, which makes the speedo run at 2-3 mph faster than actual (compared to GPS speed app)? To get the speedo accurate, I have to reduce mm to 2595, which isn't the actual tire circum, but it make the speedo accurate. Any insights appreciated!
It would really be up to you, but I would personally set it to be accurate with gps speed! Tires are frequently “off” from the specified size, so it would be best if the vehicle knows exactly what size the tires really are.
Hey man! Geez, AlfaOBD has a clunky UI! Hey, I commented on the Squarebody rollover vid, but like you, I have a mid-trim PW. The only options it came with were tow mirrors and the 8.4 Uconnect (luckily). Oh and the mixed emotions Dragon's Puke graphics. But if I found a steering wheel with the rear control buttons for audio control, do you think Alfa would be able to let me enable that feature? I also noticed that noticed that you changed your instrument cluster to the higher end EVIC. Can you reprogram the milage as well? I'd like to find an actual PW one, but chances are pretty slim compared to just a Lariat though. As a content idea, how about a slower overview of just AlfaOBD itself?
Don Leamon yes you can reprogram odometer and engine hours on new evic with AlfaOBD
The EVIC mileage programming is coming very soon! Getting the video together now. From what I've seen, the steering wheel controls are plug and play (with the wheel+harness). Great idea on the Alfa content/slower...there is just so much content with it!
Do you need a bypass cable for 2021 RAM 2500? I’m using alfaobd app and OBDMX+ and everything is communicating, but not making the changes.
yes
Hi Charles, I ran into some issues when changing the tire size.
After making those changes, when I go to ABS and try to select the Body Control Unit I do not get the ABS Ate/Continental.
I tried selecting my model and for some reason after connecting and opening the hood for the ABS Initialization, the start button never lids up.
Can you please assist me with this.
Thanks in advance!
Having the same issue. I continued on anyway and still have a check engine light with a b23b6 code
ABS ATE/Continental doesn’t show up in the list of options for my 2015 Ram 2500, I’m not really sure why lol. I tried it with a different one that has the model year range where 15 would fall in, but it wasn’t going to let me proceed so I backed out and am now redoing some more research…. Any idea why that would be the case on my end?
So in other words it wouldn’t let me get into the ABS static initialization so I had to revert back to what the settings were
Does it works for 04 Dodge ram?
Anyone configure Toyo 37 12.50 18 yet? I have 2018 2500 thanks
Hey, Man! Thank you for the video! I just have a problem with my 2022 Ram 2500 ABS initialization, it wouldn’t let me press the start button 3:18
Could anyone please give me an advise about that?
Same here, did you figure it out?
I gotta do this for my 305’s the damn transmission jumps in fourth like I am driving a stick shift lol but getting 35’s so I will have todo this right after that
You know, 2010 Ram 1500 had some 305/45r22 installed, then I decided to go for some MT tires, so I went for some 285/70r17 and there's when my trans started to feel a little bit rough, your know little shudder sometimes, I didn't know that when changing tire size you had to "tell your truck's computer "you did that. Gotta find a decent place with a decent scantool to fix that.
I have a check engine lamp on now. Any idea if it will go out eventually or do I need to clear something?
check the error codes and see what it's for. May or may not be related to changing the tire. Sometimes it just gets set off when changing other settings.
Thanks
Good vid. I did this the first try and it worked great but speedo was still a lil off. So I went back to change it. Not sure what happen. But power steering,park sensor and 4x4 are out. Not sure what I did wrong.
Just following up. Its seems like the truck wasnt fond of my 37s. I took a beer break and went back. Seems like its reset it self and all was good. I will stress. Be super careful what ur changing. Still a great vid bro
Seriously, even with the steps right in front of you all the beeping and dinging throws you off haha.
@@tonyvontes200 what mm did you use for your 37's?
@@sickofpdx I think the last adjustment I made was 2956 but that put my speedometer like 2 mph ahead. Still need to tweak it. Thx again. Hope that helps everyone.
Yeah mine is not resetting. No speedo and check engine light is on.
I've always wondered what if you had huge tires on but you program it for some small tires how would that affect the vehicle I wonder 🤔
Haha, speedo would be way off and transmission might shift kind of funky...it could be done though! I’m unsure of just how big or small you can program though, I’d imagine there is a limit?
I need help with a titan 55gal tank install calibration, everything I've done hasn't worked...
What have you tried so far? I know there are settings for tank size, then the actual gallons you want to show as fill/empty etc
Great Video 2 questions
1) Will the ABS lights and others come on if you just select a tire size from the menu?
2) Can you show how to turn on mirror lights as marker lights?
THANKS
Yes it will
After clearing rolls information I get notification "Failed. Service Not Supported In Active Diagnostic Session." Help!
You connected to the wrong abs module.
I tried following this procedure on my '21 Ram 2500 and was able to get to the ABS initialization step but when I go to click start, the option remains grayed out. I've double checked that I'm still connected. Have you heard of this issue/know of a fix for it? I was able to reverse the initial change to the tire size and clear all the faults that popped up but can't proceed until I can start the ABS procedure.
Did you ever figure it out, because my stop start button is also greyed out
I am stuck here also
I keep having a TPMS code come up after I did this ?
I only wish you where close to NJ....Most dealers and 4whd shops have no clue. I`m willing to pay for someone to correct my tire size..My current tire is LT 315/70R17 Cooper AT3 what would be size in MM.
HEy! HElP needed < have a2017 ram 2500, and the abs initialization is greyed out after folllwing this to a T , anyone have any thoughts ?? thank you !!!!!
I just did this on my 2017 Ram 2500 and I was also unable to do the ABS init as it was greyed out. I proceeded with the rest of the steps and everything is working with the new tire size. I did have a check engine light which I was able to clear via my Edge Monitor. I read in an earlier comment that if your not getting an ABS error you don't need to reset it. Hopefully that is the case. Otherwise an excellent video presentation
Hey bud have you had issues with parking sensors not available? I have a 2021 Ram 1500
I changed my tire size and yes my parking sensors are not working anymore. 2021Ram Rebel running 325/65R18
I did. Then I calculated the closest to tire size and changed it to that and I got them back.