Also step-torque in a star fashion, I would click them at 50, 100 and then 140....websterize wrote:Are the "strange" ones wheel locks? There might be an adapter in the frunk.
17mm socket on lugs, torqued to 140 nm.
not true if you had a matched sidewall height the circumference would be the same therefore so would the contact patch (people here in the UK dump the run-flats on the 3 series fit a smaller rim with a taller tyre because the ride is too harsh) for the same rolling diameter.jadnashuanh wrote:Unless you went wider, you'd have a smaller tire contact area. I've not been underneath the car to see if a smaller wheel would fit, assuming you could find one. It may also be a challenge finding a low rolling resistance tire in the required size, too. The people that bought the 20" wheels because of the 'look' would laugh! Personally, the 19" ones are decent for my driving, but a lot depends on your local roads and how far you drive it at any one time. My trips are generally short, and the roads aren't too bad.
First, smaller/larger wheels are paired with larger/smaller sidewall tires resulting in the exact same diameter treads.jadnashuanh wrote:Unless you went wider, you'd have a smaller tire contact area. ...
I can't find 16, 17, or 18in rims for the i3.busaman wrote:has anybody thought of trying 18" rims with a higher profile tyre in theory would take some of the harshness out of the ride.
I doubt you will find much smaller wheels that will actually fit on the car. The profile of the stock tires is not particularly low. BMW chose tall, narrow tires/wheels for a specific reason...being narrower, they have less drag. Being taller, they can have the same surface contact area as a smaller/wider tire (although the orientation is different). The i3 is an EV, where drag results in less range. They spent lots of time working out the details.engineeringDynamo wrote:I can't find 16, 17, or 18in rims for the i3.
IMO large rims with low profile tires are a sign that marketing has won an argument with engineering.