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#1
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wheel sizes on trailers
I have four bicycle trailers. But I have
modified them so it is not possible to connect them to bikes anymore, at least not the way it was intended, as I have cut that part of the front tube. This makes it easier to pull and also when you have them all around moving around and between them is easier without this protruding/annoying part. The trailers are very good for pulling. For example, in one trailer one can pack 40-50 pieces of firewood! Here [1] is what they look like. Anyway, today I examined the tire sizes. They are 2* 47-305 (16x1.75x2) 44-305 (16x1.75) 2 - 19 3/4 (24x2) (50-507?) Here, we remember the interesting formula roll-out = chainring/sprocket * wheel However having neither chainring or sprocket, what impact does the bicycle trailer wheel size has, and how does that work? Impact not on the bike but in general, I mean? [1] http://user.it.uu.se/~embe8573/work-...pertramp-1.jpg http://user.it.uu.se/~embe8573/work-...oasen-wood.jpg -- underground experts united http://user.it.uu.se/~embe8573 |
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#2
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wheel sizes on trailers
On 08/01/18 09:31, Emanuel Berg wrote:
However having neither chainring or sprocket, what impact does the bicycle trailer wheel size has, and how does that work? Impact not on the bike but in general, I mean? [1] http://user.it.uu.se/~embe8573/work-...pertramp-1.jpg http://user.it.uu.se/~embe8573/work-...oasen-wood.jpg The smaller the wheel the less easily it will be to pull it over a hard bump. Imagine the wheel was the same radius as a brick. If you pull the trailer and the wheel strikes a brick it will not naturally lift up and over the brick. Now imagine the wheel radius is many times that of the height of the brick. If you pull the trailer and the bigger wheel hits a brick it will naturally ride up and over the brick. Bearing friction is hardly a factor. "For pneumatic tires on hard pavement, it is reported that the effect of diameter on rolling resistance is negligible (within a practical range of diameters).[33][34]" https://en.wikipedia.org/wiki/Rolling_resistance -- JS |
#3
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wheel sizes on trailers
James wrote:
The smaller the wheel the less easily it will be to pull it over a hard bump. Imagine the wheel was the same radius as a brick. If you pull the trailer and the wheel strikes a brick it will not naturally lift up and over the brick. Now imagine the wheel radius is many times that of the height of the brick. If you pull the trailer and the bigger wheel hits a brick it will naturally ride up and over the brick. Bearing friction is hardly a factor. "For pneumatic tires on hard pavement, it is reported that the effect of diameter on rolling resistance is negligible (within a practical range of diameters)." OK, great. -- underground experts united http://user.it.uu.se/~embe8573 |
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