At that size not sure there would be much of a difference in weight. If there is it's negligible at that size. Like ounces not pounds as it would be in a car/truck with 18-20" rims. The biggest difference other then weight is that steel rims hold air and seal at the bead better then aluminum.
Post by chehystpewpur on Sept 10, 2019 21:38:44 GMT -5
ive had it go both ways honestly but the ounces not pounds thing could make a big diff on this small of a scale. a quality alloy rim will be lighter than steel or aluminum. its pretty much fact hence why they exist. but if anybody remembers the heavy cars that were breaking alloy rims going around corners in the mid 2000's to mid 20 teens they are weaker and less forgiving than steel. in the car world 10 pounds on the wheel equals about a 1/10th of a second diff in the quarter mile its also equal to about 100 lbs on the car its self. doesnt sound like much. if each wheel is 10 lbs lighter that could equal up to 4/10ths of a second diff or approx 400 lbs and thats a big deal. ive had wheels like that before and with a weaker motor it becomes much more pronounced. on a scoot if you could shave a half a pound or pound off the wheels it could be as noticeable as having another person on the back vs riding by yourself. things dont quite translate the same between cars and scoots but look at it this way. perspective can be everything.
car 3200 lbs. add 10 lbs per wheel + 40 lbs acts like 400 lbs car now 3600 lbs can needs diet. 12.5% increase in weight car 200 hp say you equate it to a 12.5% decrease in power you lose 25 hp it feels like it would feel like the ac is on. many people wouldnt notice that. scoot 200 lbs add 1 lb per wheel +2 lbs acts like 20 lbs extra. scoot now weighs 220 lbs 10% increase in weight scoot 2 hp. scoot you decrease power by 10% and yeah it only goes down to 1.8hp but you will feel that. now the double edged sword with the scoot side of this equation your wheels act as gyroscopes once you get any sort of road speed. centrifugal force and such. the more weight you shave off wheels the less said bike will want to stay upright when anything happens.
the scale isnt a perfect translation from micro to macro but it does matter. and you see drag cars with spaghetti noodles for front tires or back tires based on drive train for weight and rolling resistance gains. i mean come on racing teams are starting to cut weight off steering parts control arms and other unsprung weight/ dead weight for a reason. you have 50 parts u saved 1-2 lbs on and it will add up but rotating mass makes the biggest diff. same reason an automatic usually was slower in the 1/4 mile vs a manual. 10-15% driveline loss vs 25%. i wouldnt go out and spend a grand on scooter rims to get up to speed a lil quicker but i dont make money racing. a big team will spend big money on that pound diff. balance a rotating assembly for example and they shave a gram off a piston or rod here and there and can free up over 100 hp in some cases. and can raise redline by more than 1k rpms. the motor will last longer and will perform better. yeah its not a wheel but its directly connected to it. the same rules apply. the more parasitic drain you can get rid of the better performance.
Just read this topic and went to weigh the wheels on my Giorno / Dio.
I have two sets of wheels, steel and alloy. They weigh exactly the same, rubber on. 4.1 kilograms each. The alloy might be a bit lighter since the rubber on it is brand new, the rubber on steel has 2-3000 kilometers, plus the wear on the brake drum on the steel ones.
It wouldn't take much of a weight saving to be an improvement. Even 1 pound difference would make a fair difference to steering feel. As it's rotational mass.
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