Fathertom74FR
Posts: 7
Joined: Wed Sep 05, 2018 1:45 am

Re: New i3s (with pics) now what winter wheels/tires?

Mon Jan 14, 2019 9:05 am

yes, i think like you !

Andreapitt
Posts: 2
Joined: Fri Mar 27, 2015 2:29 pm

Re: New i3s (with pics) now what winter wheels/tires?

Mon Jan 21, 2019 4:52 pm

Naive question to everybody:
would a 215/45R-20 winter tires mount on the OM rear rims 195/50-20 of my 2018 13s?
I was thinking these tire:
https://simpletire.com/nokian-215-45r20 ... uWEALw_wcB

If yes can I just mount the rear winter and leave the OM 175/55-20 all season in the front?

Thanks
Andrea

jadnashuanh
Posts: 4388
Joined: Thu May 22, 2014 2:07 pm
Location: Nashua, NH USA

Re: New i3s (with pics) now what winter wheels/tires?

Mon Jan 21, 2019 8:07 pm

It's never a good idea to have mismatched tread on tires. While more traction in the rear might get you started, keep in mind that most of the steering and stopping (when using brakes) is at the front because of the weight transfer. IOW, it will likely make the car unstable.
Jim DeBruycker
2011 535i x-drive GT, 2014 i3 BEV

PBNB
Posts: 103
Joined: Sat Jul 21, 2018 11:28 am
Location: Vancouver, BC

Re: New i3s (with pics) now what winter wheels/tires?

Mon Jan 21, 2019 8:21 pm

That tire has a width of 8.47". You probably need a rim with a minimum width of 7.5" That could fit but expect a few inches of tire to stick out past the fender. Your car will get very dirty with all the mud flying!

If you search and test fit some wheels, you might find some Audi wheels or Mercedes wheels that could bolt right up. The end result should be: an overall diameter of: 27.54" which is the OEM value so you want to make sure that your new tires are very close to this number to keep your speedometer accurate.
2015 i3 REX

Andreapitt
Posts: 2
Joined: Fri Mar 27, 2015 2:29 pm

Re: New i3s (with pics) now what winter wheels/tires?

Tue Jan 22, 2019 7:23 am

PBNB, the OM tire is 195mm wide or 7.68 inches the 215mm wide tire is 8.46 inches. the difference is only 0.78 inch which I thought is only O.39 inch each side. The question is can this tire be mounted on to the OM rim?

PBNB
Posts: 103
Joined: Sat Jul 21, 2018 11:28 am
Location: Vancouver, BC

Re: New i3s (with pics) now what winter wheels/tires?

Tue Jan 22, 2019 8:12 am

You are correct, the size appears to be closer. If the i3s wheels are 6" wide, you might be able to get it to work. Do you have a tire shop willing to try a test fit? I always gone with the ideal width of the tire and found rims to match. I am always concerned about pulling the sideway inwards and losing seal at the bead.

If you can get these to fit, you will have discovered a long awaited 20" winter tire alternative for the i3s and even the i3.
2015 i3 REX

PBNB
Posts: 103
Joined: Sat Jul 21, 2018 11:28 am
Location: Vancouver, BC

Re: New i3s (with pics) now what winter wheels/tires?

Tue Jan 22, 2019 6:30 pm

I was looking at some wider wheels and came up with a future option for my 2015 REX. I would use a Michelin Pilot AS3+ in 19 inch with a similar outside diameter, then find a wheel that is about 7.5 to 8" max width. Since our i3's share the similar bolt pattern and center bore with some Audis and Mercedes, there would be a lot to chose from. Then pick the offset at near et50 or so depending on how close I want to get to the inner fender/suspension parts. The Michelin's would be about 1.5" wider than the new Ecopias for the i3s but the tire is amazing. I have them on my VW TDI and they are a great tire that will actually last. Higher density rubber should make them last for 50k miles. Should also help mileage with lower rolling resistance, but worse due to the wider contact patch, maybe it would be a wash! Then there is the added weight to deal with.

I was wondering what the inside of the i3s fender well looks like. I am trying to visualize the inner clearance created by adding the flare or is it more for appearance sake?

I was looking on realoem.com and can't seem to find anything that shows different fenders for the i3 and i3s. If the flares just bolt on to the i3 fenders then there would be no gain as far as clearance inside the flare for the wider tires to fit. The benefit to the flares would be to cut down in splatter and spray coming off the tires and messing up the sides of the car. Also makes it easy to tell that the car is an "S".
2015 i3 REX

jadnashuanh
Posts: 4388
Joined: Thu May 22, 2014 2:07 pm
Location: Nashua, NH USA

Re: New i3s (with pics) now what winter wheels/tires?

Tue Jan 22, 2019 7:22 pm

Tires that sit outside of the fender well may be illegal in many places...they can create a hazard for those behind you if they pick up and throw debris, not counting what it might do to your own paint job. That doesn't mean that it's enforced, though. Going overboard can put unexpected loads on the suspension and require alignment changes to compensate assuming the other critical clearances are still good. You certainly don't want to jam the tire into the fender on a good jolt or to tear it up in a tight turn, either throughout the suspension travel. Something a casual, static inspection may not catch. It's not all that easy to compress the car down to the bump stop manually, and a driving test could be dangerous if it did destroy the tire under that stress condition while in motion.
Jim DeBruycker
2011 535i x-drive GT, 2014 i3 BEV

CharonPDX
Posts: 89
Joined: Sat Jul 21, 2018 8:54 pm

Re: New i3s (with pics) now what winter wheels/tires?

Wed Jan 23, 2019 1:26 pm

jadnashuanh wrote:Tires that sit outside of the fender well may be illegal in many places...they can create a hazard for those behind you if they pick up and throw debris, not counting what it might do to your own paint job. That doesn't mean that it's enforced, though.


It's illegal where I am, but essentially never enforced - I see vehicles (mostly pickups) with wheels/tires that extend far beyond the fender regularly.

One thing that I have seen is the unintended consequence of it on low-riding vehicles - the wider tire may "bounce" up and hit the fender if you go over particularly nasty bumps/potholes! I've seen more than one vehicle with a destroyed fender from just that happening. (Damaged one of my own cars that way - the tire was *JUST* even with the very outermost edge of the fender, and hit a big pothole, and it put a nasty scrape on both the sidewall of my tire and the bottom edge of the fender!)

PBNB
Posts: 103
Joined: Sat Jul 21, 2018 11:28 am
Location: Vancouver, BC

Re: New i3s (with pics) now what winter wheels/tires?

Wed Jan 23, 2019 4:56 pm

I think the idea of this would be that the tires would still be inside the fender. If the i3s fenders are wider or the little plastic flare provides more room, then one may be able to stick a wider tire but the offsets would have to be played with to get it to fit. It looks like there is some extra space between tire and the suspension that could be used up to fit the wider tires.

There are a lot of wheel options when the width grows a bit. Going from 6.0" to 7.0" or 7.5" isn't really a big stretch, especially if you can push more of that to the inside.
2015 i3 REX

Return to “Modifications & Accessories”