Suspension losses confirmed

“On most roads, and especially on rough ones, a 32 mm Compass tire will be faster than a 26 mm Compass tire. But a 42 mm Schwalbe Marathon will be slower than both, even though it’s wider—because it’s so stiff that its casing absorbs way more energy.” Jan Heine concludes that higher tire pressures do not result in faster speeds.
janheine.wordpress.com