Wow, i didn't realize BMW was using these much anticipated tires! For a visual comparison of the current mpg king RE92's:
165/65-R14 vs 155/70-R19 Tire Comparison - Tire Size Calculator
These have slightly better sidewall height, 4.27 vs 4.27 inches. 18.5% less revolutions per mile! 15 pound BMW I3 stock wheel vs 11 pound gen 1 Insight wheel.
Insight 165/65 r14 RE92 specs:
Stock Wheel
Mfg: Asahi Tec Corporation
Size: 14 x 5.5 J
Bolt Pattern: 4-100mm
Lug Size: 12 x 1.5mm
Offset: +45H
Weight: 11 lbs
Finish: Aluminum
Style: 12 slot
Stock Tire
Mfg: Bridgestone
Model: Potenza RE92
Size: 165/65 R14
Compound: 78S
Treadwear: 260
Traction: A
Temp: B
Weight: 11.5
Pressure: 44psi
RPM: 926