TBO of inner tubes

[dkkim73]

On 9/8/2025 at 8:28 AM, N201MKTurbo said:

You know we are just having a pissing contest. There is no way to prove this. If I had my current bike 40 years ago, I would challenge you to a race through a city. But I'm too old and wise for that foolishness these days.

I can just imagine debriefing this story down the road. "Well, it started as a maintenance conversation, but eventually there was no way to turn back. A few forum members got together and set up a bandit street race...."

[dkkim73]

On 7/12/2022 at 7:41 AM, Shadrach said:

It's glorious in its pure 70's faux machismo.

I want one. You had me at "what would Ricardo Montalban drive". I do kind of think, though tech has improved in this industry, you got more satisfaction out of some of those model concepts. 

[EricJ]

2 hours ago, Bolter said:

I think this is true only at the F1 level with a skilled driver where serious downforce aerodynamics permit going well past 1g in cornering.  As a rank amateur motorcyclist doing track days, I would get 1g turns (45° lean)  with an old entry level 600 sport bike without mods and few cars can do that.  The skilled riders are leaning much more in racing.  

Most race cars, even in amateur series, can corner well over 1g with race tires.   Add aero downforce and cornering g-forces can go significantly higher.    So even without aero a properly set-up car on sticky tires will often outcorner even a race bike.

Bikes don't make enough downforce due to either aero or weight or have a tire contact patch big enough to provide the lateral forces needed to match a car.    Straight line acceleration is a no-brainer, though, that's where the bikes get all their speed and lap time.

[N201MKTurbo]

1 hour ago, EricJ said:

Most race cars, even in amateur series, can corner well over 1g with race tires.   Add aero downforce and cornering g-forces can go significantly higher.    So even without aero a properly set-up car on sticky tires will often outcorner even a race bike.

Bikes don't make enough downforce due to either aero or weight or have a tire contact patch big enough to provide the lateral forces needed to match a car.    Straight line acceleration is a no-brainer, though, that's where the bikes get all their speed and lap time.

Too bad Arizona Motorsports Park closed. I know the guy that put on motorcycle track days. I probably could have arranged to let you do a few laps with your race car and compare it with one of the A class riders. Late in the day just before closing.

[N201MKTurbo]

So, I researched lap times at race tracks. The fastest car times are a bit faster than the fastest bike times. But not by much. 
 

One thing I can safely say is the fastest street legal bike you can buy at a dealership will annihilate the fastest street legal car you can buy new at the dealership. 
 

Fun read.

https://forums.finalgear.com/threads/nurburgring-lap-times-bikes-and-cars-for-comparison.16754/

[M20F]

4 hours ago, N201MKTurbo said:

This was 45 years ago after all.

You have achieved 45yrs ago that which can barely be achieved with a 1.15 ratio, bravo seriously you should do this professionally. 

[N201MKTurbo]

1 hour ago, M20F said:

You have achieved 45yrs ago that which can barely be achieved with a 1.15 ratio, bravo seriously you should do this professionally. 

But I got sucked into engineering and airplanes. After I discovered airplanes, cars and bikes just became a way to get to the airport.

[EricJ]

3 hours ago, N201MKTurbo said:

So, I researched lap times at race tracks. The fastest car times are a bit faster than the fastest bike times. But not by much.

The bike is so much faster than the car on the straights that the car has to be significantly faster than the bike in the twisties to do that.

F1 cars are as much as 20-30 seconds faster than the MotoGP bikes on the same tracks, but they make tons of downforce.

AMP was an awesome track.   I have hundreds of laps there in both directions, and quite a few in the half-track configurations as well.   We raced there from the time that it opened, so about twenty years.   Losing the PIR road course was worse, though.   :'(

[philiplane]

On 9/8/2025 at 9:41 AM, Nico1 said:

A question related to the OP: How long can you 'store' a new tube? Have had one on the shelf for over 3 years...

rubber products in general have a five year shelf life, provided they are stored in a cool, dry location. Away from electric motors (which produce ozone) and away from sunlight too.

Edited yesterday at 12:35 AM by philiplane

[N201MKTurbo]

44 minutes ago, EricJ said:

The bike is so much faster than the car on the straights that the car has to be significantly faster than the bike in the twisties to do that.

F1 cars are as much as 20-30 seconds faster than the MotoGP bikes on the same tracks, but they make tons of downforce.

AMP was an awesome track.   I have hundreds of laps there in both directions, and quite a few in the half-track configurations as well.   We raced there from the time that it opened, so about twenty years.   Losing the PIR road course was worse, though.   :'(

I was only there once. I got conned into picking up wrecked bikes off the track. And then fixing them so they can run them some more. I was offered a free day to run my bike, but I couldn’t make it happen  before they closed.

[atpdave]

This is one of the “best” thread hijacks I’ve ever seen.

[N201MKTurbo]

2 hours ago, atpdave said:

This is one of the “best” thread hijacks I’ve ever seen.

But, cars and motorcycles both have inner tubes. Well cars used to.

[Pinecone]

On 9/9/2025 at 8:31 AM, N201MKTurbo said:

You must not have a lot of time on bikes.

Peak of each type, F1 versus MotoGP

https://www.redbull.com/us-en/formula-1-vs-motogp-speed-comparison

Lap times,  GP2 is 15 seconds slower than F1, but still faster than MotoGP

[Pinecone]

15 hours ago, N201MKTurbo said:

But I got sucked into engineering and airplanes. After I discovered airplanes, cars and bikes just became a way to get to the airport.

But the right car makes the trip to and from the airport so much more fun.   Especially for rural airports as they tend to have nit twisty roads for access.

[Jackk]

26 minutes ago, N201MKTurbo said:

But, cars and motorcycles both have inner tubes. Well cars used to.

Still got a car with wire center knock off wheels that takes them lol