Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Taller top gear makes a real difference (10%)

Big Dave · 01-19-2009, 12:24 AM

A lot of guys in the pickup truck community have tried larger diameter tires and the empirical result is always the same: Larger diameter tires result in lower MPG.

Wheel and tires are "flywheels" that have to be accelerated everytime you pull away from a stop. The energy stored can be tapped to a limited extent by a skilled hypermiler, but mostly gets wasted.

Forget the tires and get taller gears.

01-19-2009, 12:24 AM	#40 (permalink)
Big Dave Master EcoModder Join Date: Jan 2008 Location: Steppes of Central Indiana Posts: 1,319 The Red Baron - '00 Ford F-350 XLT 90 day: 27.99 mpg (US) Impala Phase Zero - '96 Chevrolet Impala SS 90 day: 21.03 mpg (US) Thanks: 0 Thanked 186 Times in 127 Posts	A lot of guys in the pickup truck community have tried larger diameter tires and the empirical result is always the same: Larger diameter tires result in lower MPG. Wheel and tires are "flywheels" that have to be accelerated everytime you pull away from a stop. The energy stored can be tapped to a limited extent by a skilled hypermiler, but mostly gets wasted. Forget the tires and get taller gears. __________________ 2000 Ford F-350 SC 4x2 6 Speed Manual 4" Slam 3.08:1 gears and Gear Vendor Overdrive Rubber Conveyor Belt Air Dam