BMW i3 Wheels: Efficient & Effective or Skinny & Skidding?

You get a better view of just how tall and thin the tires on the i3 without the body in place.

One of the features on the i3 that have had many BMW loyalists cringe when see them is the tires. They are tall and thin, and look more like you would expect them on a Toyota econo-box, than from the engineers in München.  The standard rubber on the i3 will be custom made for the car, low-rolling resistance 19-inch Bridgestone Ecopia tires, sized 155/70 R19. They are mounted on  featherweight 19" x 5" wheels, weighing only 15lbs. There will also be a 20" wheel option, but BMW hasn't disclosed the exact size of that wheel of the tires that they will mount on them. 

The stock 19" wheels

I suspect many potential i3 buyers will get past the thin, underwhelming look of the tires as long as they perform admirably. After all, they only look bad from the from or rear; when looking at them from the side it's difficult to see how thin they actually are. But what do I mean by perform admirably? That may be different for different people. Low rolling resistance tires typically aren't good for the "ultimate driving experience" the rubber is hard and doesn't usually offer premium grip for cornering. Sticky high performance tires usually deliver bad fuel economy because the rolling resistance is high. I suspect many i3 buyers will be most concerned with efficiency and range in which they would probably favor efficiency slightly over performance. But let's face it they still expect it to perform like a true BMW, and that's something BMW has promised will be the case with the i3. 

What may be the 20" optional wheels

When discussing the tall, narrow tires with Georg Kacher of Car Magazine, Ulrich Kranz of BMW said "It’s not rocket science. All that matters is the size of the contact patch. The 19-inch tires may be skinny, but their tall height generates the same contact patch as a low-section 16-inch MINI tire"  Kacher then went for a ride in a pre-production i3 and wrote this about the handling: "This is extraordinary. The i3’s most awesome dynamic talent is its incredible grip. The made to measure tires are about as narrow as those of a 125cc motorbike, yet they hang on almost as tenaciously as BMW’s latest DTM racer... The car zooms towards the apex, kisses the cobbles and flies out onto the short straight. There is very little lean considering the considerable pace, and I don’t recollect more than a faint trace of front end pitch and no yaw at all. This i3 appears to handle like the best BMWs."
 

The original i3 concept wheels

Then Michael Specht from the Automotive News wrote this after driving an i3 a couple days ago: 
"BMW's i3 electric car looks set to be a winner. I drove it recently and I can only say: Wow! Whoever drives this car will want one immediately. I can't remember when I was more surprised by a car's driving dynamics. One of BMW's marketing slogans is "sheer driving pleasure." BMW was keen that this should apply to the automaker's new electric vehicles sold under the "i" subbrand and the company has succeeded with the i3."

The i3 concept coupe's 20" wheels

However Autoblog had less than total praise for the i3's handling: "The test cars were fitted with skinny, rock-hard and low-rolling resistance 19-inch Bridgestone Ecopia tires, sized 155/70 R19. After just a single spirited lap of the set course in 93-mph v-max Comfort mode, it was clear that we were driving the i3 in a style for which it was never designed. If you try to make the i3 live up to the well-honed definition of "Ultimate Driving Machine," you are categorically missing the entire point of the i3." That's not what the majority of potential i3 buyers want to hear - me included. Don't tell me I'm missing the point if I buy a BMW and expect it to handle like a real BMW! I don't care what type of fuel it uses or whether it's a hatchback or sedan, it's a BMW!  However this is the only article I've seen that criticizes the handling and I've probably read about a dozen that have said they were impressed. The final verdict for me will be when I get behind the wheel of on myself and I urge everyone else to do the same thing. It's nice to see car reviews but let yourself be the judge when you are purchasing a car. After all, it's your money and you'll be driving it!

BMW has done everything they reasonably could to cut the weight of the i3. This allowed them to use a smaller battery and still get their tareted range of 80 to 100 miles with the i3.With the battery being the most expensive component of an EV by far, it's not surprising they are so obsessed with weight savings. However what is the perfect balance of efficiency and performance? No doubt the car would handle even better with wider, stickier tires on there which would need wider wheels, which would then weigh considerably more. Finding the perfect balance was BMW's task, it's just up to us to drive and enjoy the car. I hope they got this one right because the i3 won't be the Ultimate Driving EV if it isn't fun.

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The i3 Concept Coupe Stars in Geneva

Dr. Norbert Reithofer, Chairman of the Board of Management, BMW AG, addresses the media in front of the i3 concept coupe'

There has been a lot of prognosticating on the interwebs lately in regards to what BMW will have to say about the upcoming i3 at the Geneva Motor Show. Some have speculated they will unveil the actual production i3 while others have guessed BMW will simply offer a little more information, just enough to keep us interested without disclosing too much.

Well, BMW didn't reveal the production i3 (which is looking more and more likely to happen in Frankfurt in September) but the chairman of the Board of Management, Dr. Norbert Reithofer, did have this to say to the media today as he addressed the media in front of the i3 Concept Coupe':


Ladies and Gentlemen, Welcome to the BMW Group!

This is what individual mobility of tomorrow looks like and we will bring it to the road – as early as this year. This stands to show that we don’t just talk the talk. We walk the walk – because we are convinced that e-mobility is the technology of the future. We all know how the world is changing. In megacities, the car can only have a future if we take the right steps to lead it from low-emission to zero-emission technologies today. We strongly believe that sheer driving pleasure will also work without emissions.

The BMW i range offers a broad range of possibilities. What you can see here in Geneva is a variant of the BMW i3 – the BMW i3 Concept Coupe.

And I can tell you this much: Many of the components used for this Coupe are close to the series vehicle. This model highlights the great dynamics of the fully-electric BMW eDrive technology. Just like the BMW i3, the Coupe offers a maximum output of 125 kW or 170 hp. This e-drive is an in-house development – which is what customers expect from a company called Bayerische Motoren Werke AG. The underbody is fitted with lithium-ion batteries that provide the power to the e-drive.

We believe that customers will decide to buy an e-car if they receive compelling offers. Still, success is not guaranteed. But I am an engineer, and as such I know that technical progress and pioneering work require a daring approach. At the BMW Group, we have tackled the issue of e-mobility from a holistic perspective, and let me add: more so than any other automaker.

This means:

A completely new vehicle concept, consisting of Life and Drive modules.
New materials such as CFRP.
Sustainable production.

The media will have the opportunity to test-drive the BMW i3 this fall. I have already driven it quite a few times, and let me tell you: Cruising the city in this agile and noiseless sprinter is, without a doubt, sheer driving pleasure. Unfortunately, our stage is too small; otherwise, I would be happy to give you a little demonstration on the spot. Thank you very much to the BMW i3 Concept Coupe!

The BMW i range is one example of the foresight that we have at the BMW Group. We aim to provide our customers once and again with innovative solutions and attractive services, which meet their individual demands and offer them additional benefits. Proof of this is the vehicle we would like to present to you next.

So now I think we have a more defined timeline. Here is how I think it will proceed:

-Between now and the Frankfurt Auto Show in September we will continue to get little bits and pieces of i3 information, just enough to keep everyone interested and media satisfied. An occasional journalist will get to drive in one, but not for a comprehensive review.

-The production i3 is introduced in Frankfurt including specifications and pricing. 

-The media will get full access to drive and review them in October.

-European sales begin in November and US sales start in January. 

Do you agree? Post your thoughts below in the comment section.

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BMW i3 Concept Coupe Video

A new video of the BMW i3 Concept Coupe surfaced on YouTube today. Here it is for your viewing pleasure...

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BMW i3 Concept Coupe Revealed

BMW i manager Oliver Walter introduces the concept i3 coupe at the LA Auto Show

BMW surprised a lot of people at the LA Auto Show and introduced a new variation of the i3, a 2 door coupe to compliment the 4 door hatchback that will launch towards the end of 2013. This new coupe is currently only a concept, but if BMW feels enough people would buy this variant, it could easily go into production.

It shares the same drive platform as the 4 door i3, so most of the engineering is already done. All BMW would have to do is make the different passenger cell and attach it to the same drive platform that the 4 door will be using. Now I'm sure it's not exactly that simple, but I am also confident most of the drive platform would be exactly the same.

The i3's life-drive platform

In fact, Oliver Walter referred to the "i3 family of vehicles" when addressing the crowd of ActiveE drivers at the LA Auto Show. I interpreted this as a sign BMW may use the i3's drive platform to make multiple different offerings.  Since the CFRP passenger cell is literally glued to the aluminum frame which houses the entire drivetrain and batteries, it wouldn't seem to be very difficult at all to offer multiple passenger configurations, provided there was a demand for different offerings.


Many of the people I spoke to were very excited about the coupe, even more so than for the 4 door which is going to be the initial i3 offering. While I liked the look of the coupe, Personally I'm more interested in the utility of the 4 door. The access to the rear seating area is so much better with the coach(suicide) doors on the 4 door. Getting in and out as well as loading and unloading cargo from the rear seats will be infinitely easier with the coach doors and I don't think it takes away from the styling at all, especially since there are no outside door handles for the rear doors. I also think another reason why many others were so excited about the coupe was because looked closer to a production car than the four door i3 does. Lets face it, the 4 door concept car is getting a little long in the tooth and people are getting tired of looking at the glass doors and roof. It was introduced about a year and a half ago and other than a different color interior there has been no changes to it. I get a lot of inquiries about when will BMW show us the production version. The concept coupe has a new, refreshed interior that quite honestly looks stunning and ready for production. I suspect this is very close to what the production i3 interior will look like and I hope BMW doesn't change much because it looks awesome as it currently is.

BMW North American manager of sales and strategy Jacob Harb was also at the event and he spoke for a while and then fielded questions from the ActiveE group. There really wasn't any new news offered. We talked a lot about the range extender option as well as DC quick charge. There was also a lot of discussion on the tires BMW seem to be using on the i3. They are tall and thin and don't look like they would be good for aggressive driving. The concept coupe at the show had 175/60 R20's on the rear wheels and 155/60 R20's on the front. No doubt the different tire sizes were a concept-only feature but the tall and thin nature of them had people wondering if too much road holding will be sacrificed in the name of efficiency. We also talked a lot about the use of run-flat tires. I can say with certainty the ActiveE drivers there, and many others that I have spoken to do not want run flat tires on the i3. I hope BMW got the message and decides not to use them. They are loud, harsh and heavy and we do not want them. Can I be any clearer?

The openness of the i3 is hard to capture in pictures. Although it is a small car, the interior is spacious. During the presentation Walter said the i3 will have roughly the same interior volume as a three series. That's considerably more space than our ActiveE's have now even though the i3 is much smaller. Because of the life-drive architecture and the elimination of the transmission tunnel needed on front engine internal combustion engine cars, the i3's passenger compartment is much more spacious than a comparable gas car of it's size would be.

So while I'm really happy to see BMW thinking about expanding the i3's line to offer different variations, what I'm really looking forward to is finally seeing what the production i3 will look like. We are tantalizingly close now after nearly four years of waiting. I'm figuring I'll get my wish in about three months in Geneva? Anyone else care to guess when and where BMW will show off the real i3?

Here's some more pictures from the LA Auto show:

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