Anyone know anything about disc brakes?

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TooTallTim in reply to @Brommers

Rotor size has no effect on the maximum loading on the fork

If the caliper is further away, there's more leverage on the mounting post, no? I'm genuinely asking because physics was lost on me at school

The limiting factor is how big a brake disc you can fit before it hits the inside of the fork leg. It's a geometric limitation, not a strength limit.

On fork legs that taper, I get that. But on a straight legged suspension fork, the rotor will never touch no matter how large a rotor. Yet there's a maximum spec'd size from the manufacturer. I appreciate I'm including all forks in this debate, road and MTB

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Brommers in reply to @TooTallTim

If the caliper is further away, there's more leverage on the mounting post, no? I'm genuinely asking because physics was lost on me at school

The longer lever works both ways. It increases the mechanical lever operating in the caliper mounting points. But it also decreases the force needed to be exerted by the caliper due to the additional mechanical advantage. In the end it all equals itself out.

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