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Depends on speed, maybe rider weight and their position and road slope?
If I know I'm hitting the anchors hard then I'm moving my bodyweight back. I dunno, I'm having a hard time visualising just jamming on the brakes but I'm pretty sure I'd break traction before I went anywhere near going over the bars.
"Controlled" braking then you'd probably stoppie but that's assuming you were aware of the limits of traction in the first place.
hippy-
Depends on speed, maybe rider weight and their position and road slope?
Speed is not a factor. Rider weight is a neglible factor since in dominates system weight. Position is technically a factor but for practical solo safety cycles only beach cruisers and Dutch bikes might have sufficiently rear-shifted weight balance to make enough difference, and even then I'm not sure. Slope has an effect, but only going uphill makes skid more likely, and who's hitting the brakes hard going up hill? Very sudden application of the brake can cause a skid in a situation where steady state braking would cause a stoppie, because it brings moment of inertia about the tipping axis much more into the equation, but even then a stoppie is the more likely outcome in most cases.
Essentially, for most classes of solo safety cycle, the tipping limit is about 0.6g deceleration, while the grip limit on dry clean tarmac is about 1.0g, so you need a big geometry shift or very compromised grip to slide the front in a straight line.
gbj_tester
On dry tarmac, the limit of the front brake should be a stoppie rather than a skid