Quote:
Originally Posted by coop8070
bigger tires.
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Bigger tyres to reduce rpm will only work on long runs, not when you have to do frequent stop & go's
Bigger rims and/or tyres are heavier
Wider tyres are heavier & cause more drag
They also tend to cost more - unless the smaller size is uncommon & harder to get.
(Had a look, small sizes are expensive in the US, and the choice is ...meagre)
For economy, low unsprung weight is a bonus
My summer tyres are 15" light alloys, 185, 3% oversized, yet despite their better rolling resistance rating, they barely match my FE on 14" steelies, 175, regular sized winter tyres ...