Ive decided to keep my VX wheels instead of geting slipstreams. One reason is that i found an awesome 205/60 tire for my little VX's, and the weight would be considerably less then a 15 inch slipstream with 205/50's. Now, im a bit worried about circumferance. I calulated the radius of my VX wheels + tires to be 222.5 mm. Multiply that by 2 pie and the circumferance is 139.73 cm. COmpare that to your average civic runing 15's with 50 profile tires, radius is 237.5 mm, and the circumferance is 149.15 cm.
so roughly 150 cm vs. 140. Thats about......7 percent. So for every revolution the 15's would move the car 7 percent more. Theres two ways of looking at this, both make sense, i dont know which one makes more sense.
Option A) The 15's would give more output for the same force exerted, and thus would improve acceleration.
Option B) Having a smaller circumferance would be like, in effect having more aggressive gears. The wheel would have to spin faster at any given speed, thus RPM's would be higher, so technically smaller wheels would put me in my powerband faster and make the gearing even more aggressive.
So, given any RPM, the car with the 15's would be traveling faster. BUT, given any MPH the car with the smaller wheels would be at a higher RPM, thus giving it the powerband advantage.
Can anyone with some real life experience tell me which would be better for acceleration?

 

common isnt this the TECH forum? Given the fact that most slicks are for smaller sized wheels with small profiles, im guessing smaller circumferance improves acceleration. Which makes the VX wheels better yet again.

 

The smaller circumference will yield better acceleration, similar to having shorter gearing. It isn't so much the "powerband" advantage, as it is the mechanical advantage of the shorter overall gearing.

 

YES!!!!!!! God i love my VX wheels. They were free, they look good, and now they help me accelerate better. muahahahahaha

 

you'll lose on top speed but that's it!!! if you want acceleration it's the way to go!!

 

ya, putting a smaller wheel is like altering your final drive, to a higher one.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JSMC &raquo;</TD></TR><TR><TD CLASS="quote">you'll lose on top speed but that's it!!! if you want acceleration it's the way to go!!</TD></TR></TABLE>

hehe, who cares about top speed, as long as i dont top out 5th before the end of the 1320.

 

i don't know if you care but this will of cause you speedometer and odometer to be inaccurate.