# Tire Pressure Change from 2018 to 2019 and On **URL:** \ **Category:** General Discussion\ **Tags:** bmw\ **Created:** [September 16, 2021, 4:16pm UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401 "2021-09-16T16:16:27Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![amatevosian\_177230](https://avatars.discourse-cdn.com/v4/letter/a/ec9cab/32.png) [@amatevosian\_177230](https://community.cartalk.com/u/amatevosian_177230)\ **Post date:** [September 16, 2021, 4:16pm UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401/1 "2021-09-16T16:16:27Z")
Hey Folks: Can anyone verify that the 2018 i3s BEV and 2019 i3s BEV have the same tire pressures of 33/41? I have a 2019 i3s REX and the tire pressures are quite a bit higher…particularly on the front. For this car it’s 39/44. I’m baffled as to why the change given the cars are pretty much identical in all aspects…even weight. ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [September 16, 2021, 4:21pm UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401/2 "2021-09-16T16:21:28Z")
You’ll want to post this on a BMW i3 forum, that’s a really model-specific question. If the sticker on your car specified 39/44, then that’s what I’d use. ---
**Author:** ![amatevosian\_177230](https://avatars.discourse-cdn.com/v4/letter/a/ec9cab/32.png) [@amatevosian\_177230](https://community.cartalk.com/u/amatevosian_177230)\ **Post date:** [September 16, 2021, 4:23pm UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401/3 "2021-09-16T16:23:26Z")
On my car it’s 33/41. It changed to 39/44…which is considerably higher. I tried finding the i3 forum in the pull-down menu and it’s not available. So I couldn’t post it there. But more importantly, I would like know the reason for the change. The dealer can’t answer this question which is mind-boggling to me. ---
**Author:** ![ledhed75](https://avatars.discourse-cdn.com/v4/letter/l/f6c823/32.png) [@ledhed75](https://community.cartalk.com/u/ledhed75)\ **Post date:** [September 16, 2021, 4:34pm UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401/4 "2021-09-16T16:34:55Z")
Why does it matter? If the sticker on the door jamb and the owner’s manual both say 39/44, just go with it. ---
**Author:** ![amatevosian\_177230](https://avatars.discourse-cdn.com/v4/letter/a/ec9cab/32.png) [@amatevosian\_177230](https://community.cartalk.com/u/amatevosian_177230)\ **Post date:** [September 16, 2021, 4:36pm UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401/5 "2021-09-16T16:36:17Z")
It matters to me because I’m interested to know. ---
**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\ **Post date:** [September 16, 2021, 4:37pm UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401/6 "2021-09-16T16:37:22Z")
> [@amatevosian\_177230](#): > > I have a 2019 i3s REX and the tire pressures are quite a bit higher The REX model has a 2 cylinder range extender engine and is heavier the the base electric model. ---
**Author:** ![amatevosian\_177230](https://avatars.discourse-cdn.com/v4/letter/a/ec9cab/32.png) [@amatevosian\_177230](https://community.cartalk.com/u/amatevosian_177230)\ **Post date:** [September 16, 2021, 4:44pm UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401/7 "2021-09-16T16:44:29Z")
There is no difference between the REX and BEV model tire pressures. The only change is due to model year. ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [September 16, 2021, 5:30pm UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401/8 "2021-09-16T17:30:44Z")
> [@amatevosian\_177230](#): > > I tried finding the i3 forum in the pull-down menu and it’s not available. So I couldn’t post it there. There is not a I3 forum here . A simple web search will find you one. If the door plaque says what pressure to use that is all you need to know. ---
**Author:** ![amatevosian\_177230](https://avatars.discourse-cdn.com/v4/letter/a/ec9cab/32.png) [@amatevosian\_177230](https://community.cartalk.com/u/amatevosian_177230)\ **Post date:** [September 16, 2021, 5:38pm UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401/9 "2021-09-16T17:38:15Z")
Nevermind. I don’t think I’ll have a productive conversation here. Incredible. ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [September 16, 2021, 6:14pm UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401/10 "2021-09-16T18:14:09Z")
Are you surprised that a general car forum doesn’t have information about a very specific question on a car with limited sales? You just need to google ‘BMW i3 forum’ to find owners that might, or might not, have any information. The question you’re asking would really need to be answered by a BMW suspension/tire designer, but good luck finding one to contact. ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [September 16, 2021, 8:57pm UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401/11 "2021-09-16T20:57:46Z")
A guess… it was done to improve the range of the vehicle. Higher pressures in the tires will give lower rolling resistance and better mpgs/ev range. Likely the tire spec changed as well. Not the size, the design spec of the tire. ---
**Author:** ![Barkydog](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/barkydog/32/2470_2.png) [@Barkydog](https://community.cartalk.com/u/Barkydog)\ **Post date:** [September 16, 2021, 9:22pm UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401/12 "2021-09-16T21:22:59Z")
Remembering when they wanted to change to 10k oil changes not based on mfg desires, but on conserve oil desires. Probably not a huge deal but sometimes politics over rules. ---
**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\ **Post date:** [September 16, 2021, 9:27pm UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401/13 "2021-09-16T21:27:40Z")
Not sure what oil change distance has to do with tire pressure . ---
**Author:** ![oldtimer-11](https://avatars.discourse-cdn.com/v4/letter/o/e79b87/32.png) [@oldtimer-11](https://community.cartalk.com/u/oldtimer-11)\ **Post date:** [September 17, 2021, 3:49am UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401/14 "2021-09-17T03:49:50Z")
Barkydog was just pointing out that changes in specs are sometimes due to political pressures that have nothing to do with vehicle engineering parameters. ---
**Author:** ![CapriRacer](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/capriracer/32/22_2.png) [@CapriRacer](https://community.cartalk.com/u/CapriRacer)\ **Post date:** [September 17, 2021, 12:28pm UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401/15 "2021-09-17T12:28:46Z")
According to Tire Guides, there was no change in tire pressures from 2018, 2019, and 2020. For a BMW i3. But they don’t delineate an REX model and maybe that is the difference. Normally when an OEM increases inflation pressure, they are doing it because the weight increased, or they have a handling issue they are trying to solve, or something like that. In this case - like Mustangman said - I wonder if there was a tire size change. There has been a lot of activity lately on that front - new sizes, new types of loading, etc. I doubt very much anyone here or outside of the BMW design department would know. ---
**Author:** ![circuitsmith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/circuitsmith/32/40376_2.png) [@circuitsmith](https://community.cartalk.com/u/circuitsmith)\ **Post date:** [September 17, 2021, 1:11pm UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401/16 "2021-09-17T13:11:02Z")
> [@amatevosian\_177230](#): > > I don’t think I’ll have a productive conversation here. Sometimes this is the wrong forum for the pursuit of knowledge for knowledge’s sake. Straying from some unwritten charter can draw a scolding. ---
**Author:** ![JoeMario](https://avatars.discourse-cdn.com/v4/letter/j/3bc359/32.png) [@JoeMario](https://community.cartalk.com/u/JoeMario)\ **Post date:** [September 17, 2021, 1:47pm UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401/17 "2021-09-17T13:47:42Z")
> [@amatevosian\_177230](#): > > Nevermind. I don’t think I’ll have a productive conversation here. Incredible. Hi Amatevosian: While that may be an understandable sentiment, I encourage you to pay attention to CapriRacer’s reply above, especially his last sentence. He worked for years in the engineering dept of a major tire manufacturer and dealt with car manufactures on all types of tire issues like this. ---
**Author:** ![pyrolord314](https://avatars.discourse-cdn.com/v4/letter/p/6a8cbe/32.png) [@pyrolord314](https://community.cartalk.com/u/pyrolord314)\ **Post date:** [September 17, 2021, 3:41pm UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401/18 "2021-09-17T15:41:41Z")
> [@circuitsmith](#): > > Sometimes this is the wrong forum for the pursuit of knowledge for knowledge’s sake. > Straying from some unwritten charter can draw a scolding. I think @amatevosian_177230 thought we had an i3 specific forum or subforum: > [@amatevosian\_177230](#): > > I tried finding the i3 forum in the pull-down menu and it’s not available. So I couldn’t post it there. which would likely have a better answer for such a model specific question. BTW @amatevosian_177230 that particular drop down menu simply tags the car’s make and model to the post to assist people in the future if they’re searching for specific topics. ---
**Author:** ![wentwest](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/wentwest/32/6073_2.png) [@wentwest](https://community.cartalk.com/u/wentwest)\ **Post date:** [September 19, 2021, 4:40am UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401/19 "2021-09-19T04:40:20Z")
OK, so here’s a link that took me about 1 minute to find. Whether your particular question has already been answered I don’t know, but join up and ask there. [BMW I3 Rex forum](https://www.mybmwi3.com/forum/viewforum.php?f=13&sid=2786237016de5e668302948cb34efcbb) ---
**Author:** ![wolyrobb](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/wolyrobb/32/45497_2.png) [@wolyrobb](https://community.cartalk.com/u/wolyrobb)\ **Post date:** [September 19, 2021, 5:09am UTC](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401/20 "2021-09-19T05:09:43Z")
The OP’s already on there, under the technical section of the forum, [https://www.mybmwi3.com/forum/viewtopic.php?f=11&t=17490](https://www.mybmwi3.com/forum/viewtopic.php?f=11&t=17490) [Next page](https://community.cartalk.com/t/tire-pressure-change-from-2018-to-2019-and-on/179401.md?page=2)