cupoftea said:
I afraid weight is a factor with braking.
An alternative view is that a weightless (i.e. inertia-less) bike would also take no force at all to stop. See my post above - weight, all else being the same, cancels out.
cupoftea said:
If you want to talk about MTB tyres I’m afraid that most normal MTB tyres will still out brake a road bike slick.
Again, both you and ludwig are wrong on this. The limiter for stopping in the dry is centre of gravity issues (i.e. taking stopping to the point of an endo), not tyre friction with the road. That might actually make you right, but not for the reason you're both arguing with. MTBs might win as it's easier to get your weight lower and more to the rear than on a head down/arse up road bike.
As for your argument that knobbly tyres have more traction, LOLOL! It's been proved quite conclusively now that slick tyres are rather a lot more sticky than treated tyres on the road. MTB tyres are designed for traction off road, not on road, and that's why they don't perform as well. Regardless, contact patch size is at most only a second order effect, and thus won't have nearly as much influence on braking as will coefficient of friction and the bike's c-of-g relative to front wheel contact point.