y aren't bike tires made from roller blade wheel material?
968943
Many reasons:\n\n1. Too heavy (numero uno!)\n2. ZERO wet grip\n3. Would fly apart with the rotational inertia\n4. Go ahead- YOU try mounting them.\n5. A $50 pneumatic tire protects your $500 wheel from destruction.\n6. Horrible ride quality.\n\nSolid tires were tried over 120 years ago when the bicycle was invented.  A Frenchman named Dunlop created an air-filled tire, and it was SO MUCH better than a solid one that nobody in their right mind would ride anything else.
315229
Not Steel, but steel alloys.  In particular, stainless steel alloy.
927320
Think of common sense and think of a wheel with rolling friction and think of using a giant slab of rock being dragged on the ground. Which is easier to move from point A to point B. Yes, the wheel has a certain surface area which is quite minimal hence you need traction with wheels if you are going fast.
273505
That's going to be dependent upon the compound used for the tire (a tire made with a soft rubber designed for increased grip if going to lose more tread than a tire with a harder rubber designed to last a long period of time), the temperature of the tire (rubber gets softer as it heats up), the weight of the load placed on the tire, the friction between the tire and the road surface, and the type of road surface (a smooth road surface is going to be much easire than a rough road surface).\n\nThere's too many variables to really try to get to an answer.
837410
No. That's why some material are crystalline, but some are not. Those that do not have symmetrical molecular bond structures can look amorphous, lacking any particular recognizable shapes.
931515
Seems like a bogus question. The wheels can't avoid slipping in the first part of that .53 seconds. Do I misunderstand the question?
781213
sorry I was thinking of the wheels when I first answered!
1033342
I always prefer the hand built wheels.  However, when you talk about machine built wheels this means more than one thing.  There's the Campagnolo Bora-Ultra, which are as good as wheels get.  Then there's the Bike Nashbar machine built wheel, which would probably be less reliable than a hand built wheel.\nThere are a couple of reasons I like hand built wheels even over the high-end machine built wheels, but the biggest thing is that they are cheap and easy to repair.  If I ding the rim my hand built wheel will cost me $30 plus labor to repair.  Ding that Ksyrium and you have a nice wall ornament.\nA set of Campy record hubs, Velocity rims, and some double butted spokes.  Straight lace a 28-hole front hub.  Tie and solder the rear spokes and you will really have something.
392792
Not only are race tires flat to add more contact area to the ground for traction, but they are also smooth to reduce the amount of mass on the tread.  At high speeds, the tire circumference actually increases because of the rotational centrifugal force on the tread of the tire.  If you go faster than the rating of the tire the tire can actually expand so much as to fly off the rim.
725445
You can't without the radius of the wheel...m/s is a tangential speed.
331608
America Speedster has both plans and kits for some very interesting quadracycles.  Some are built from pvc using hand tools and recycled bike parts.  See the link below.\n\nSometimes there are plans advertised on e-bay but some of them are just photocopies from old mechanics magazines.
184636
Bike tires are made in the same fashion as automobile tires and very often by the same manufacturers.
995344
clincher's are standard type that most folks are familiar with.\n\ntubulars you have to glue to the rim (special type of rim) tube is sewn up inside the tire casing, making flats very hard to repair.
519407
they're called Rollie Reds or something...basically its magnets...there's mini brakes on the wheels so instead of rolling it just stops!
681726
What it dew?  That is the new what's up.  Shoes are tires and rims are feet.
644793
There would have to be a compelling reason to make wheels that are not round.  If wheels were triangular or square, the ride would be very uneven and bumpy.  Oval wheels would be smooother but still bumpy.  If many sides were used (perhaps a hexagon or more) on the tires for use on a smooth surface, they would cause severe vibrations.  Wheels need not be round if the surface traveled on is not smooth and mates with the new shape, but the extra cost would have to be justified by a new advantage.
7172
Rubber previously came from extraction from actual rubber trees, from the resin within the trees. However, nowadays rubber is manufactured as a by-product of the petroleum industry.