[email protected] wrote in message news:<
[email protected]>...
> "Fastest, smoothest flatproof" are contradictory specifications.
This is true; there is no free ride.
> Fastest, aka lowest rolling resistance requires a thin casing and thin smooth tread. Flatproof
> requires thick tread, Kevlar fabric and thorn-proof tubes, aka, the highest rolling resistance.
Yes, the more flat protecting material the greater the hysteresis losses in the rolling tire.
I still use Mr. Tuffy tube protectors on my town/utility bike. I generally don't use them on the
bikes I use for recreational riding though I have used them in the winter when flats are a real drag
to fix on the road. With Mr. Tuffy's I go years between flats; they are an excellent product for
riders who don't want many flats and don't mind its performance tradeoffs.
> Of course even worse are airless tires that are so bad that they are only conversation pieces,
> although the never get a flat.
I actually worked at bike shops that sold these. Even worse than the fact that they ruined the ride
of a bike they were often a bear to get on.
Bruce
--
Bruce Jackson - Sr. Systems Programmer - DMSP, a M/A/R/C Group company