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I have a friend of mine who put a car tire on his bike. It took the indy 3 days to get the tire to pop onto the rim. (he couldn't get it to work at all)
He told me it took the road vibration out due to the thinner sidewall. I will find out if it really works when he gets back from his trip in September.
Don't get me wrong I have no intention of actually trying this I just put it out there for information purposes.
Doesn't really look like something I would want to try, after watching the videos. I would like to see a similar video with a stock motorcycle tire, just for comparison.
Commuting 20,000 miles a year, ( thats replacing one front tire and two rears every year,) I understand the thinking re: using a car tire. Any savings on fuel cost gets sucked up by tires and 5000 mile maintenances, which I do myself.
Fortunately, thanks to the forum, I tried Dunlop E-3's and at 6 months, ( when I should be replacing my first rear tire,) I've got 50% left on the tread.
There's no reason to even try and justify using a car tire. IMO
I don't know what movie you guys were watching, but it sure looked to me that there was more then enough tire in contact with the road at all times. Even when running straight take a look how much of the tire is making contact with the road. That has to equate to more stopping power. Car tire are designed to handle more weight then motorcycle tires, so handling might feel different. Just like when you make any changes to stock suspension parts. That 2000 cc Vulcan puts out more power then a Harley in stock form, but didn't seem to have any unpredicted handling quirks. From what I have read about this subject there are several car tires that perform better then others. Different compounds with different sidewall strength. I find it funny how people nowadays are quick to shoot down bike modifications, when not that many years ago guys were riding around with 30 inch longer then stock Springer front ends that were real "death machines" that would never work.,,
I find it funny how people nowadays are quick to shoot down bike modifications, when not that many years ago guys were riding around with 30 inch longer then stock Springer front ends that were real "death machines" that would never work.,,
There were fools back then too. just like there are today...
And as for that "fat contact patch," I'll take pounds per square inch over too much contact patch anyday, I like stopping...but then I never rode a 30" over Paughco Springer either...
And as for that "fat contact patch," I'll take pounds per square inch over too much contact patch anyday, I like stopping...but then I never rode a 30" over Paughco Springer either...[/QUOTE]
Really, pounds per square inch over too much contact patch? In case nobody ever told you, your tires contact patch is the only thing on your bike that grabs the road no matter what the situation is. If you bother to watch the videos, you will notice neither of the bikes shown had any difficulty handling the bikes going straight, or into left and right hand turns. So where's all the predicted gloom, doom and fiery crashes? Also extended front ends are nothing new , but new riders probably haven't been in the bike scene long enough to have known about them.,,
Back in the 70's my Norton 850 Interstate was the only " handling" motorcycle I ever owned. And the Kaw, HD FX and even the GoldWing that followed after that really couldn't corner like anything today. I suppose a car tire wouldn't have made that much of a difference.
Guess I just miss the point. Surely no one argues that the car tire handles BETTER than a bike tire. There are really high milage bike tires out there now. So where's the benefit of the car tire?
Just cause you can do it doesn't mean you should...
As for the importance of the size of the contact patch, ever run a car with fat tires in the snow? Same principle applies to bikes in the rain.
There are really high milage bike tires out there now. So where's the benefit of the car tire?
Just cause you can do it doesn't mean you should...
As for the importance of the size of the contact patch, ever run a car with fat tires in the snow? Same principle applies to bikes in the rain.
Damn.... this is gonna sound like I'm defending these car tire guys..... I AM NOT. But your wrong on both premises. First, there is a HUGE benefit to car tires despite the obvious drawback. The first is of course cost. They cost a lot less and second they still last a lot longer than any motorcycle tire. Next, your contact patch theory is completely back wards. Not only is a larger contact patch safer, but motorcycles don't operate in the snow, They operate on concrete where they actually do benefit from larger contact patches. If this was not the case you could make John Force even richer by explaining to him all he needs to do to win another nationals is to run narrower tires. Also, car tires have massive rain groves and deeper treads that have over 100 years of technology and water channeling testing into them. The tires these bike guys are running are barely an inch wider than whats on the bikes already and once you factor in the massive water groves automotive tires have, you really are talking about a non-issue in the rain compared to a conventional motorcycle tire.
Again, I am not advocating them, just discussing them.
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Last edited by bikerlaw; Aug 13, 2011 at 11:59 AM.
I appreciate the conversation too bikerlaw...Here's my thinking:
Sure, a bald tire (slick) is best on dry pavement. On water however, which is incompressible, everything lifts to a degree. ( Look at the warnings about driving anything through even a couple of inches of water.)
So if I'm going to push that water towards a rain groove in the tire, I want weight per inch. And on my bike in the dusty environment where I work, I can see that my tires contact patch is about 1 1/2" wide, not 4 or 5 as in a non rounded car tire.
On wet roads, I gotta think I'll stop quicker on a bike tire. A car tire is going to want to float IMO.
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