3 ms·
My guess is that it saves the trouble of making a wheel that can rotate along the vertical axis (to turn left and right). That greatly simplifies the design an
by bnegreve 11y ago
My guess is that it saves the trouble of making a wheel that can rotate along the vertical axis (to turn left and right).
That greatly simplifies the design and make the whole thing more robust.
- mikeash 11y agoHome Depot has decent swivel wheels for maybe eight bucks retail. The wheel that rotates doesn't have to be active.
- bnegreve 11y agoHum, I think a free swivel wheel would only work for very cheap designs. If you're not convinced, you can search for 3 wheels vehicles on google image [1]: none of the vehicles there have the 2 wheels + 1 free rotating wheel design that you recommend. https://www.google.com/search?q=3wheels&biw=1673&bih=1124&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiKz_yL-JfKAhVIJR4KHdy3AxwQ_AUIBygC https://www.google.com/search?q=3wheels&biw=1673&bih=1124&so... Edit: actually, some baby carts have it .. alright http://www.aliexpress.com/store/product/EMS-Free-shipping-Good-Quality-Perambulator-Baby-Stroller-With-3Wheels/711381_1538853521.html http://www.aliexpress.com/store/product/EMS-Free-shipping-Go...