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Discussion in 'Road Warriors' started by cabanza, Nov 7, 2017.
Mid elevens ain't too darn bad!
For the power cruiser people
and just an extra comment.. 8:58
installed the RSD wheels and a set of Scorpion Trail II today, WOW what a difference...
Your pictures didn't come through....
lol ok ok...
Running the same tires on stock wheels. Any notable advantage to the RSD wheels? Are they worth the dough?
Well I only ran the stock tires on the stock rims but I will say that there is an extremely noticeable difference with rolling resistance and turning in. It felt so much more alive, I couldn't be happier.
Plus the part that really made you happy - it's only 88 dB A by the phone app!
The RSD wheels are 75% off, but they weigh the same as stock so it’s just a visual upgrade. They look great, and $875 for a set of rims is hard to pass up but I’m putting the $875 I wanted to spend on them into a fund for a Toce system.
Yes they are the same weight but it is how the weight is distributed
Darn, I won't be saving any lives with that low of decibels...
How is it different enough? Considering that the wheel is unsprung weight, and unsprung weigh includes the wheel, tire, brake discs, calipers, axle, and lower fork sliders: I would think any distribution would not be very noticeable.
Let's say you have 2 separate wheels that each weight 20 pounds.
One wheel has an outer rim that weighs 15 pounds, with the spokes adding the other 5 pounds.
The 2nd wheel has a 10 pound rim area, and 10 pounds supporting that rim.
They both add the same to unsprung weight, but as each wheel rotates faster, the effects of the weight distribution will be more and more noticeable. I think the wheel with more weight further out will have a much greater resistance to change direction.
Sounds too complicated. Maybe I should just hunt down some of those fancy carbon fiber wheels.
I don't know if that's true- don't know that it's false either. It seems...tenuous at best.
Do the new rims claim to be made as you describe?
That is the claim of the poster made, that the wheels and tires made turn in easier, since the weight was distributed differently.
Even a heavier tire alone can make a difference due to the imcrease in rotating mass. Slower acceleration, more braking force required to slow the wheel, and more force needed to change direction. The further the mass from the center of rotation, the greater the affect.
That's pretty much the science involved. That's why gyroscopes and flywheels usually will carry most weight to the outside. Some flat trackers are using wheels with material left in when machining them, the extra material is at the perimeter to work as flywheel weight to smooth power delivery and maintain traction coming out of corners.
If they can't add flywheel to the engine due to the rules they do it to the rear wheel.
Less weight on the outside will take less power to rotate and have less resistance to turning in
Here a simple way of putting things without me boring the living crap out of you with physics of rotational mass.
1. Think of a 25lb weight on a rope. Put that weight out at your wrist and try to lift it. Move the weight to your bicep and lift it. You are still lifting 25lb but the closer you move it to your body the easier it is to lift.
2. Take two wheels of the exact same weight, one with more weight to the outside of the wheel, one with weight to the inside of the wheel. Grab it by the axle and spin it, try to tilt the wheel from side to side. The one with the less weight to the outside of the wheel will be easier to tilt. Rotational mass wants to stay in the direction that it is moving ( stay upright ).
All of this equals less rotational mass that the engine has to move and less force that you have to exert to lean into turns.
Is everyone still awake?
Good to see the American educational system is crushing it.