Originally Posted by ersatz radio
That doesn't make any sense.
The most force you'll be able to apply is determined by the friction of the tire, it'll be the same as a hard skid. It doesn't matter if the chain stops moving because it's caught on something, or if it stops moving because the cranks aren't moving (skidding).
I run a 38c tire, going 25mph, am 190lbs. Chain fell off the chainring and wrapped under itself at the cog, heard it tear apart after the chain fell. Trust me, the cog and lockring were on there nice and tight.
I was going at a speed where I would have had to lean
way forward to even think about skidding, but had all my weight on the saddle.