On 15/11/2017 09:47, Peter Keller wrote:
On 15.11.2017 17:45, Bret Cahill wrote:
Guessing wildly I'd say a road bike is almost 2X more efficient, i.e., 60 on a fully sprung mountain bike burns as many calories as 100 on a road bike.

Any real studies on this?


Bret Cahill



A quick google produced:
https://physics.stackexchange.com/qu...-mountain-bike

(one person's calculations involving a road bike and some suppositions
about mountain bikes)

https://bicycles.stackexchange.com/q...ad-bike-speeds

Neither of these seem to be "real" studies, but the consensus seems to
be that mountain bikes require about 15% more power from the rider than
road bikes.


Anecdotally, I'd say that's a bit low, using low-mid range bikes as
examples.

I recently bought a s/h Specialised Cirrus 'hybrid sports' bike after
using a mountain bike (mainly Specialised Rockhopper) for about 10 years
on my 2 mile hilly commute. Seems like a lot less effort for the same
speed - maybe 25%.

--
Cheers, Rob