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Old 10-05-12, 05:52 PM   #26
ThermionicScott 
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Originally Posted by MightyLegnano View Post
ThermionicScott, ofcourse it has fresh pads, only museum bicycles have old pads.

Why do you call my theory crummy? All responses were very interesting, I already said that. I'm '
regurgitating' the theory because having added to it elements like skinny tyres=less friction and safety levers makes it more complete for people to argue about. Jeez, if I was your doctor I'd prescribe you more hill training for your uptightness...
You would be surprised how many people complain about poor braking when it turns out they're still using the stock pads from 10, 20, 50 years ago.

Your theory ("All old road bikes have weak brakes") is flawed because not all of them do, especially when set up properly! You are, though, getting some possible reasons why the bikes you've tried didn't stop very well. Skinny tires at high pressures do have a smaller contact patch, but I would look elsewhere for the cause.
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There's no such thing as too far.. just lack of time
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Old 10-07-12, 10:57 AM   #27
LarDasse74
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Originally Posted by ThermionicScott View Post
Skinny tires at high pressures do have a smaller contact patch, but I would look elsewhere for the cause.
Right. Although skinny HP tires have less traction, the majority of old road bikes I have ridden have brakes barely capable of skidding the back wheel, and nowhere near strong enough to skid the front wheel or cause an endo... meaning the tires are not the limiting factor.
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Old 10-07-12, 11:57 AM   #28
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Right. Although skinny HP tires have less traction, the majority of old road bikes I have ridden have brakes barely capable of skidding the back wheel, and nowhere near strong enough to skid the front wheel or cause an endo... meaning the tires are not the limiting factor.
Pretty sure I can endo my 87 road bike with out blinking if I braked incorrectly.
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Old 10-07-12, 12:23 PM   #29
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The contact pressure on a road tyre rather high, tyre compounds play a significant role in traction and braking.

The reduced mass of a road wheel at the rim reduces the energy required to slow and stop it compared to heavier wheels and tyres on other bicycles as a wheel functions as a flywheel. The faster speeds one may see on a road bike is what warrants better brakes as the speed at which the rim is moving is higher and e=mc2 holds true here.

The brake wear on a high performance wheel of lesser diameter like a 20 inch is much higher due to the higher relative speed of that smaller diameter wheel spinning much faster at the same speeds.
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