[Hot Item] Twin wheels suspension casters, SA69SP-4/6/8, Caster Wheels, China, Factory, Suppliers, Manufacturers
The wheelchair application seems to run straight into the eternal problem with sprung wheels. Without dampers, they bounce badly, as sometimes seen in tractors fitted with buckets on a bad road. With dampers, they have very high rolling resistance. I tire needs enough flex to meet the ground, but any further suspension should be on the axle. Lardo January 30, 2018 06:00 PM
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Loopwheels come in front- and rear-specific versions, one of the key differences being that the springs in the front wheel are twice as compliant as those in the back. This is (presumably) to help keep the wheel that does the steering from being knocked and bounced around, plus it compensates for the fact that more of the rider’s weight tends to be centered over the rear wheel.
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Barel sees bikers embracing the SoftWheel. “Our wheel will enable bikers to ride faster and more smoothly,” he said. “In standard wheels, about 30 percent of propulsion energy is reserved for suspension, even if that suspension isn’t necessary at a specific time. With our system, suspension can be turned on and off as needed, reserving more energy for speed.”
The wheelchair application seems to run straight into the eternal problem with sprung wheels. Without dampers, they bounce badly, as sometimes seen in tractors fitted with buckets on a bad road. With dampers, they have very high rolling resistance. I tire needs enough flex to meet the ground, but any further suspension should be on the axle. Lardo January 30, 2018 06:00 PM
Within 20 metres you notice how smooth the ride is, looking down and you see that its not fresh tarmac, rather it’s a country road, yet the ride gives no indication of the road surface, its just smooth – you are feeling the road rather than the grotty surface.
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I bought the car like this from the dealer. Pretty certain it is stock suspension. The Fronts are 20 x 8.5 and the backs 20 x 10. The front tires are Nankang Untra Sport NS-II 245/35ZR20 and the backs are Nankang Untra Sport NS-II 275/30ZR20. just switched to my winter setup, so i want to move my 20" Here are a couple of pics of my 2009 G37S with stock suspension and 20" wheels. I would love to lower the front some but I am fine with the back and I don't want to get into all the other issues that come up with lowering a car (rubbing, alignment issues, etc etc).
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This is just something i thought of the instant i saw these, they do look fun though but if indeed they do feel like your “going up hill” all the time they’d have to be VERY fun to be worth the extra effort. I guess for crazy obstacles??
I don’t see how they could maintain torsional stiffness under braking… And that falls into the “bad” category. Mindless on April 15th, 2013 - 12:58am Gillis on April 15th, 2013 - 1:41am
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This causes the hub to momentarily dip down within the wheel by up to 45 millimeters, so it’s actually a bit off-center until the springs flex back into their regular state. For this reason, the wheels will only work on bikes that already have sufficient space between the fork/frame and the tire – otherwise the bike would be hitting its own tires when the springs compressed.
This active suspension preserves more of the forward motion energy that would normally be lost as the suspension allows the wheelchair to bob and sag. It also allows the wheelchair to ride over curbs and bumps that might have stopped traditional wheelchairs, giving users better access to places where ramps haven’t yet been installed.
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