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JSH · 09-04-2022, 12:59 PM

I decided to swap the horrible stock Michelin Energy Saver A/S tires for a set of Michelin Pilot Sport A/S 4. The stock tires ride poorly, have poor traction (B) and were at the wear bars after 43K miles.

The Pilot Sports are Ultra High Performance All-seasons with a traction rating of AA. I'm a bit surprised that they have a 45,000 mile tread-wear warranty which is about as long as a quality set of all-season tires should last. We will see the effect on efficiency - I expect about a 5 - 10% drop which is well worth the extra traction and safety. It didn't hurt that they were the cheapest tires in that size at Costco (with the help of a $150 Michelin discount). I paid $690 for the set installed which is the most I've ever paid for a set of tires. A function of current high prices and the oversized 17 wheels on the Bolt. (There is no reason the Bolt shouldn't have 15 inch wheels like my old Prius or Jetta Wagon but oversize wheels are the fashion today.) I run 15 inch winter wheels / tires.

As to efficiency - I'm behind on my monthly reports

June:
1117 miles / 4.8 m/kWh = 233 kWh consumed
192 kWh from home charger
Cost = $28.81

July:
780 miles / 4.7 m/kWh = 166 kWh consumed
170 kWh from home charger
Cost = $25.53

August:
1209 miles - 4.7 m/kWh = 257 kWh consumed
184 kWh from home charger
Cost = $27.60

09-04-2022, 12:59 PM	#57 (permalink)
JSH AKA - Jason Join Date: May 2009 Location: PDX Posts: 3,521 Adventure Seeker - '04 Chevy Astro - Campervan 90 day: 17.3 mpg (US) Thanks: 311 Thanked 2,082 Times in 1,410 Posts	I decided to swap the horrible stock Michelin Energy Saver A/S tires for a set of Michelin Pilot Sport A/S 4. The stock tires ride poorly, have poor traction (B) and were at the wear bars after 43K miles. The Pilot Sports are Ultra High Performance All-seasons with a traction rating of AA. I'm a bit surprised that they have a 45,000 mile tread-wear warranty which is about as long as a quality set of all-season tires should last. We will see the effect on efficiency - I expect about a 5 - 10% drop which is well worth the extra traction and safety. It didn't hurt that they were the cheapest tires in that size at Costco (with the help of a $150 Michelin discount). I paid $690 for the set installed which is the most I've ever paid for a set of tires. A function of current high prices and the oversized 17 wheels on the Bolt. (There is no reason the Bolt shouldn't have 15 inch wheels like my old Prius or Jetta Wagon but oversize wheels are the fashion today.) I run 15 inch winter wheels / tires. As to efficiency - I'm behind on my monthly reports June: 1117 miles / 4.8 m/kWh = 233 kWh consumed 192 kWh from home charger Cost = $28.81 July: 780 miles / 4.7 m/kWh = 166 kWh consumed 170 kWh from home charger Cost = $25.53 August: 1209 miles - 4.7 m/kWh = 257 kWh consumed 184 kWh from home charger Cost = $27.60 Last edited by JSH; 09-04-2022 at 01:14 PM..