Monday, January 25, 2016

Moped tires for Cargo bikes?

Schwalbe Marathon 

Bicycle tires do not do well on really heavy duty cargo bikes. But you may need to buy or build a new disc brake steering fork to hold a moped tire on a large cycle truck. An Elf car could use these or even bigger three inch wide by 24" O.D. moped tires with no problem.

Shinko SR714 

Moped Tire  2.25-16

240lbs load limit

If you want a tire that will out last all bicycle trires, consider this.

The Moped tire to use for a heavy duty cargo bike build should have a load rating of 50 for 419lbs and 4-ply tread casing 16” rim size X 2.25-2.50 inch section width (Unless you an find wider fenders). But it is very difficult to find one that will fit a bicycle rim. And some of the single ply tires have a 4 ply rating, not as good as actually having 4 plies.

Approximately 21-22 inch O.D. fits well in a 1.85-2.125-inch wide BMX rim. You will need to use large steel tire irons.

Mopeds and motorcycles measure tires at the rim, bicycles measure the outer tread, and they are heavier than bicycle tires, but surprisingly, they are also cheaper than high-performance bicycle tires. Coupled with 16-inch motorcycle tubes, they are unlikely to ever get a flat even with out liner.

For the rear even if you can find a large enough moped tire, you will probably have to build the frame to fit. Unless you can find an old cruiser bike frame. And while your at it, make room for a motor and reduction gears behind the seat post. Your not going to want to pedal 600 to 800lbs up a 4% grade or steeper.

I realize most of you can't even think about heavy tires because you are so weak in the legs. So build some bionic-leg muscle! Or get a 1500 watt or larger motor and apply it as a fixed-gear drive, not a mid-drive! Running that much power through a bicycle drive chain is dangerous and will wear out he chain fast!

Most of the 2.5 inch wide tires fit a 17 inch rim that means you have to build to fit these tires!

Pirelli ML75

Tire Liners

Bionic Legs

             motorcycle tire load rating index:

 Rim sizes for bike tires:           
16 inch (305mm)

Saturday, January 2, 2016

Motorcycle Truck Hybrid

If you try using bicycle tires on a cycle-truck that can hold 800lbs the tire will probably blow out right away. What you need are two large 100mm wide tires made for 419lbs each. But it will also need larger than bicycle wheels.

      Look for one like this: "Shinko SR740 Tire - Front - 100/80-16” rim Load Rating: 50, Ply: 4"
small electric truck made in china

People need to learn to slowdown!

A motorcycle truck limited to 20mph is what amerika needs. All it needs is a bicycle drive train and and fixed-gear drive to the rear wheels, with a jack axle to let the wheels move independently from each other when turning a corner. Build it as a power assisted bicycle limited by a 20mph gear, and put this large high voltage motor on after the thing is registered, so the cops won't see it.

The 'fixed-gear' would be set so the machine cannot drive faster than the prescribed speed-limit. Using electronic controls to limit the speed could be a liability if you were involved in a wreck.

Bicycle parts on the front end and light motorcycle wheels and brakes on the rear.

a large heavy vehicle like this could improved by using a two speed gear box.


The only reason to use two geared hub motors on the drive wheels, would be to get more traction in the cornering. Like if you had to drive up a very steep, sharp switchback on a road winding up a mountain. This could be good for off road use also. The jack axle will allow the wheel on the outside of the turn to move faster with out traction, than the one on the inside.