So why are the braking distances for bikes not getting any better? - BMW S1000RR Forums: BMW Sportbike Forum
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post #1 of 19 (permalink) Old 05-02-2011, 09:22 PM Thread Starter
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So why are the braking distances for bikes not getting any better?

So why are the braking distances for bikes not getting any better? We are still stuck in the 60-0 in 120 feet, while cars like the ZO6 and GT-R are getting close to 60-0 in 99 feet. Whats holding us back? Where is the technology for us (carbon ceramic brakes)?

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post #2 of 19 (permalink) Old 05-02-2011, 09:30 PM
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I think one major issue is tire size. Cars are using wider and wider tires. While sport bikes are staying in the 190-220 Rear range. Any modern sport bike will lock the both wheel solid yet stopping distances will not vary significantly because of this matter.

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post #3 of 19 (permalink) Old 05-02-2011, 09:33 PM Thread Starter
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I think one major issue is tire size. Cars are using wider and wider tires. While sport bikes are staying in the 190-220 Rear range. Any modern sport bike will lock the both wheel solid yet stopping distances will not vary significantly because of this matter.
True. The ZO6 Vette has 325 mm wide rears.

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post #4 of 19 (permalink) Old 05-02-2011, 10:19 PM
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Straight up braking is no longer limited by tire size. Our front tires are capable of lifting our rear tires off the ground under braking. The tire/suspension capability has exceeded our CoG moment of rotation. Plainly put, your tire size no longer matters if you can get the rear to lift off the ground and thus negate it's capability to transfer braking force to the ground. It all becomes a matter of balance between front grip and front flip.

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True. The ZO6 Vette has 325 mm wide rears.
The Vette won't stoppie either. It's rears stay on the ground.

As far as ceramic brakes, carbon brakes, etc are concerned, they only affect braking power after frequent braking from high speeds. They are more tolerant of heat and even work better at high temperatures. They actually underperform regular street brakes for a cold quick stop from 60-0.

Last edited by Fungus Amongus; 05-02-2011 at 10:24 PM.
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post #5 of 19 (permalink) Old 05-02-2011, 10:53 PM
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Originally Posted by Fungus Amongus View Post
Straight up braking is no longer limited by tire size. Our front tires are capable of lifting our rear tires off the ground under braking. The tire/suspension capability has exceeded our CoG moment of rotation. Plainly put, your tire size no longer matters if you can get the rear to lift off the ground and thus negate it's capability to transfer braking force to the ground. It all becomes a matter of balance between front grip and front flip.
Although suspension and rear tire contact are vitally important lets not forget
that in bikes the front tire does most of the braking. Thus...tire compound and size are what gets us to stop.

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post #6 of 19 (permalink) Old 05-02-2011, 11:37 PM
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Originally Posted by RIQUE View Post
Although suspension and rear tire contact are vitally important lets not forget
that in bikes the front tire does most of the braking. Thus...tire compound and size are what gets us to stop.
Not sure you understand Fungus' point. The front tire has enough grip not only to stop the motorcycle but to endo it rear over front. Grip/compound/contact patch is not the issue, you can put a steamroller tire on the front, the bike endo-ing is still the limiting factor to stopping distance.

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post #7 of 19 (permalink) Old 05-03-2011, 05:07 AM
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yep, hadn't thought of that, but brakes have been capable of more than the bike and tire can handle for some years now.

For a motorcycle to have the best braking...you need a long cruiser layout. Not only can you bring the rear in more, the bike's center of rotation is moved backwards, so more force can be applied up front.

That being said...what are the braking distances of MotoGP bikes?
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post #8 of 19 (permalink) Old 05-03-2011, 07:43 AM
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That being said...what are the braking distances of MotoGP bikes?
Found this: Brembo MotoGP 2009 data - all courses

For interests sake, you can compare: Brembo Formula 1 2009 data - all courses

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Last edited by lightcycle; 05-03-2011 at 07:46 AM.
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post #9 of 19 (permalink) Old 05-03-2011, 07:53 AM
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HOLY SHIZZZZZZ!!!!! Over 5G's of braking force!!!???
I knew Formula 1 was rediculous, but I've never seen that figure before! WOW!
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post #10 of 19 (permalink) Old 05-03-2011, 08:09 AM
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HOLY SHIZZZZZZ!!!!! Over 5G's of braking force!!!???
I knew Formula 1 was rediculous, but I've never seen that figure before! WOW!
That's why Schumacher's neck is bigger than his waist...

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