Yuba bicycles and add-ons are designed for everyday trips by ordinary people. We make bikes that help people live healthy and full lives without needing a car for their transportation. Picking up kids from school, dropping off 50 pounds of apples for a friend, giving a date a lift, this is what our bikes live for. Because all of our bikes have integrated racks, they have unusually high hauling capacity, and unsurpassed stability under load, which means they ride like, well....a bike! The second feature that differentiates our bikes is that we have almost 20 accessories to help you configure the bike to your specific lifestyle. For children, our accessories are designed to grow as the child grows.
▶ I want to build a music stage / mobile kitchen / lockable cargo box on by bike. Do you have any resources?
One of our favorite way to use the Boda Boda or the Mundo here at Yuba is to carry a SUP (stand-up paddleboard). We have carried wave boards (8.5" long) and race boards (14" long). We have also hauled whitewater kayaks, and even sea kayaks. It is easy and simple to use the Boda Boda and the Mundo to transport long loads. Both bikes feature side loading platform. The board or craft is positioned lengthwise on the bike. In general it is best to position the board on the right side of the bicycle. A couple of pieces of high-density foam positioned along side the rack create the necessary clearance for the biker's feet. With some crafts such as a whitewater kayaks it doesn't even require to use a block of foam. Yuba Bicycles will be releasing a SUP/ Surf/ Kayak pad system during the summer. In the meantime below are some instructions to help you make your own.
To carry your board on Yuba Bicycle you will need: A block of high density foam. Pipe insulation foam. A pair of Yuba Utility Straps. 1) Select and cut the high-density foam. • We do recommend using high-density foam. Such foam can be found at a kayak or surf shop. You will need a piece the size of about 16"x7". • Cut one piece of about 16" tall and 5" thick. This is the piece that will push the board away from the carrier. • Cut a second piece of about 16" tall and 1" thick. This piece will be positioned towards the end of the carrier, it gives the board a bit of cushioning.
- Speed of a 20-lb bicycle at 160 watts effort : 14.8 MPH
- Speed of a 60-lb bicycle at the same effort, level ground : 14.6 MPH
- Speed of a 20-lb bicycle at the same effort, 5% uphill : 7.2 MPH
- Speed of a 60-lb bicycle at the same effort, 5% uphill : 6.1 MPH
- Speed of a 20-lb bicycle at the same effort, 5% downhill : 23.9 MPH
- Speed of a 60-lb bicycle at the same effort, 5% downhill : 25.5 MPH
Lighter *is* faster, but by a far, far smaller degree than widely supposed. Most of the work of pedaling a bike above speeds of about 12mph is overcoming wind resistance, not overcoming the inertia of the bike itself. Also, heavier bikes are notably slower to accelerate. It’s just that once they’re rolling, it’s not much more effort at all to keep them going.It’s funny that I don’t perceive the Mundo as being slower, except when it’s loaded up with a lot of cargo and I’m heading up hill. Quite the opposite. I guess this is just perceptual, since my previous bike only had one gear, and apparently a pokey one at that. The heavier Yuba Mundo is also slower to stop, and this jives with Newton’s laws of motion, too. I actually bought a louder bell (a nice brass Crane bell with a spring loaded clapper) on my bike last week because I was worried someone would walk out in front of me while the bike was loaded and I was zooming down a hill. It takes a good long while to stop, even with well adjusted disc brakes (which by the way, I would consider to be essential components of any cargo bike). Objects in motion like to stay in motion, indeed. I asked the same question of my friend and once college roomate Phil, who is now one of the world’s top experts on the subject of athletic power. He confirmed and expanded upon Todd’s explanation, and reading his response it began to feel a bit as if we were talking more about airplanes than bikes:
The takeaway is that the extra mass matters, sure, but not as much as one would think. Which is another way of saying that carrying your groceries home on your bike instead of your SUV is not as crazy an idea as you might think. Another conclusion I made form this inquiry is that I made a good decision in getting the Yuba Mundo. It’s extra length adds weight, sure, but doesn’t add anything (or not very much) to the aerodynamic cross section of the bike. Something like a bakfiets, with a wide honking cargo box on the front, is, to use Phil’s expression, punching a much bigger hole in the air. It’s funny, but now that I’ve been riding the Yuba back and forth to work every day, getting groceries with it, and of course, lugging my telescope around on it, I can’t believe I sat in a car for long and let an engine, and way too much fossilized dinosaur poop, do the work for me. It’s not much work at all, and the cost per mile is stronger legs and lungs. *The link is to an excellent RadioLab episode that features a story about the RAAM. RAAM’s official website is here.
1. Roughly 80% of the energy of pedaling a bike involves overcoming air resistance. Thus, under all conditions other than a strictly uphill climb, aerodynamic considerations vastly outweigh weight considerations.
2. The most important consideration with respect to how quick you will get up a hill is the power to weight ratio, i.e. how many watts can you generate versus how much mass you are moving up the hill. Very good riders (i.e. guys that contend for the Tour De France) generate maybe 5ish watts per kg body mass and can hold than for less than an hour. More pedestrian riders probably generate 2 watts per kg over a similar time frame. You make considerably more power than this in the metabolic sense, however, you are only about 20-25% efficient in terms of what actually gets delivered to the external environment. This is why you get hot when you exercise…the rest of the energy is liberated predominantly as heat.
3. The most important consideration with getting down a flat road is power versus frontal surface area. Hence the aerobars you see on time trial or triathlon bikes. You are trying to poke a smaller hole in the air.