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> The tubes of a traditional bike essentially form two diamond shapes. Huh? I only see one diamond shape. There are two triangle shapes; one from the steering
by Karellen 3y ago
> The tubes of a traditional bike essentially form two diamond shapes.
Huh? I only see one diamond shape. There are two triangle shapes; one from the steering column to the seat post, and one from the seat post to the rear-wheel axle. They make up one diamond, not two.
What am I missing?
- pests 3y agoI think double refers to the tubes making up the frame being double lined for strength. It took me a bit of searching but it does appear "diamond frame" bikes are a concept which then makes sense. Apparently some mountain biking applications or uses with more stress require a "double diamond frame". That's what I could figure out though. I also don't think they need to be exactly triangles, just as long as the nodes are generally connected via the same edges. Also sometimes the top and bottom bar don't meet at a single point on the steering post so that shape ends with with 4 sides.
- hermitdev 3y agoI'm not sure, either, but the double could also refer to having the two triangular arms to secure the rear wheel instead of a single one.
- pests 3y agoI thought that might be it too but found literally 0 references for it. edit: Also, don't all of the designs have two arms in the back? Even the original "diamond frame" has the same rear tire attachment.
- beckerdo 3y agoConsider the possibility that one diamond goes from the steering tube to the right rear axle mount and the second diamond goes from the steering tube to the left rear axle mount.