Michelin e.Primacy vs Michelin Pilot Sport All Season 4 — Compared

“Got the Michelin e.Primacys today - what an improvement! 2019 owner, bought a little over 2 years and 34k miles ago. Have always had the OG Energy Savers and was never happy with their performance as far as grip. After needing my second set of tires in 2 years I wanted something new and knew these were coming because of the new Bolt. Stretched as long as I could on my previous set until I had a close call last week. These popped up at the local tire shop, and also took the chance to swap to the Cruze Eco rims. First impressions (note these are the same size as the factory Energy Savers): Smoother Ride on Rough Roads WAAAAY Less Road Noise, Especially at Higher Speeds Dry Grip is Much, Much Better (not sports car, but if the Energy Savers were 2/10s these are 7/10s) Efficiency Seems Similar (needs more testing, only have ~30 miles right now) Read more”

“Seen a couple of Q8 e-tron owners say the Michelin e.Primacy gives a small bump in range and lower road noise compared to the OEM Continental EcoContact, but wet and winter grip can feel a bit less confidence inspiring.”

“I got a bit carried away and looked up the tyre label and Michelin's numbers for rolling resistance, and the weight of a BMW i3 . Short answer: save 6%. Here's the result as a table. RR C kg/t or N/kN mass tonnes Drag N or kJ/km Wh/km Wh/mile unit values 1 1.00 9.81 2.72 4.38 E.Primacy 5.5 1.7 92 25 41 Car tyres (C1) fuel class A 6.5 1.7 108 30 48 Car tyres (C1) fuel class B 7.7 1.7 128 36 57 Car tyres (C1) fuel class C 9.0 1.7 150 42 67 Car tyres (C1) fuel class D 10.5 1.7 175 49 78 class E is anything worse than D The total energy per mile for tyre rolling resistance of a 1.7 ton vehicle running on bottom-of-the-band class B tyres is about 57 Wh/mile, or about 22% of EVDB's broad figure for the i3's total consumption 261 Wh/mile. With Michelin E.Primacy tyres (rolling resistance from Michelin's publicity), that should drop to 41 Wh/mile for the tyres, or a saving of 16 Wh/mile, a range improvement of about 6%, or from 3.8 miles/kWh to 4.1 miles/kWh. Nice to have, but not dramatic. It does show that fuel label class C, D or E tyres are worth avoiding if you can fit better.”

“I use these on my F80 M3 competition with the 666M wheels for the winter. I had Continental DWS 06 Plus on my E90 M3. The PSAS4 have stiffer side wall than the DWS06 Plus, so the ride will feel more sporty if that's what you're after. PSAS4 also have slightly more dry pavement grip and tad more steering feel than the DWS. The DWS is a tad bit quieter and softer sidewall. Superior to the PSAS4 in light snow. Dry pavement grip is still amazing. I have 2 sets of 666m wheels for my F80 comp. One set outfitted with Pilot sport all season 4 and the other set outfitted with Pilot sport 4s.”

“New Tires (Michelin Pilot Sport All-Season 4) I know this has been discussed a lot here so I won't go into a ton of detail, but I recently got a '23 GT (DCT, around 30k miles) and the stock tires were so ASS. Decided to grab the ones in the title and it's literally night and day difference. I was getting terrible traction when just barely accelerating w/ stock tires. Now I can basically floor it. Same with braking; felt pretty damn bad before, and so much better now. The ride, in general, also just feels more comfortable (smoother, though I didn't notice a huge sound difference, but I usually have music on anyway). Haven't gotten to really push it on turns or anything yet, but it's definitely a big difference already with the small bit of driving I did after getting them installed. I did also go with 235 over the stock 225.”

“Michelin Pilot Sport All Season 4 efficiency FOLLOWUP: On a recent drive, similar speed (70-80) and same route, I managed to get 290Wh/mi. Only notable difference was that the outside temperature was now 25-30C (instead of <10C) In trying to debug WTF tesla is doing, I started looking at the CAN bus. It appears that the car tries to keep the battery in the 30-35C range, so pretty much all that extra power usage was the car trying to maintain battery temperature in cold weather rather than the tires. Original post--------------------------------------------: just FYI about Michelin Pilot Sport All Season 4 235/45zr18 98Y I knew to expect a small efficiency hit, but this is almost as bad as when I towed a 2000lb boxy trailer. M3LR, stock 18" wheels and aero covers, no roof rack, no bike rack, driving in ~10-15C ~70-80mph funny part is that with the $0.46/kWh supercharging for the California portion of the road trip, driving a Tesla comes out more expensive than a 22mpg gas car @$4/gal :rofl: Read more”