California tire rules: The tradeoff shops face
California's new tire rules force a hard choice between fuel and traction. With U.S. vehicles averaging 13 years old, affordability takes a hit.
Ray Donnelly
13 min readEfficiency
Ray Donnelly
13 min readReplacement Tire Rules: California's 55M Unit Shift
California's new rules impact 55M tires yearly. Ray breaks down the EV load conflict and why compliance costs may limit your inventory options.
Ray Donnelly
14 min read
Michelin X Line Grip D Retread: The Casing Is the Asset
Michelin's X Line Grip D retread promises 4 retreads and a million-mile casing. Here's why that's a ceiling you control, not a tire spec, plus a fleet decision
Ray Donnelly
11 min read
Potenza Sport EVO: When the UHP Upgrade Earns Its Price
Potenza Sport EVO delivers 5% wet braking, 6% rolling resistance, EU "A" gains — but the $409.99–$756.99 buy only pays off when duty cycle matches the UHP tier.
Ray Donnelly
11 min read
EV Tires: Consumer Reports Says the Premium Often Doesn't Pay
EV-specific tires win on rolling resistance and noise, not wet braking. See where the 15–25% premium pays and where it stocks dead.
Priya Raman
9 min read
Tire efficiency facts: The 30km Twingo upgrade
Ray breaks down how the Continental EcoContact 7 adds 30km of range to the Renault Twingo by slashing rolling resistance for EVs.
Ray Donnelly
15 min read