Rotary Car Club - Tires, Sidewalls, Things

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- - Tires, Sidewalls, Things (https://rotarycarclub.com/showthread.php?t=19220)

Quote:

Originally Posted by infernosg (Post 342454)

Without going into too much detail the closer the center of mass is to the point of rotation the less inertia it has. Basically, it's easier to accelerate/decelerate. It's why racers use small diameter, ultra-lightweight flywheels.

That's a good point. I completely forgot about those. I never calculated the weight of a 15" wheel and tire combination. I was looking at RPF1's and they don't come in a 15" wheel with our 5x114.3 bolt pattern. Depending on the wheel and tire widths and tire sidewall I'm sure it could be even lighter than the 16" combination but at some point you're trading weight for contact area and sidewall flex.

Speaking of RPF1s.... They are pretty well known for being a great light weight option right? I've noticed manufactures aren't providing wheel weights on their spec sheets (that I've seen). I like the RPF1 but I'd prefer a different wheel just for the sake of having something a little different but I dont want 100lb wheels lol.

The forged TSW wheels I was looking at stated the weight of their wheels. Their 18" option I was looking at was only 18 pounds!

Quote:

Originally Posted by project86 (Post 342458)

The reason the RPF1s are so popular is because of cost, weight, and strength. There really isn't anything else in the price range that does what it does.

Tirerack does a pretty good job at posting up weights of the wheels they sell, but weight of tires matter, too. Buying super lightweight wheels is great and all, but if your tires weigh a ton then it obviously negates the benefits.

All of that kind of just makes me want to get the RPF1s. Affordability has suddenly become a big deal.