C&D: Effects of Upsized Wheels and Tires Tested
04-19-10, 10:55 PM
#17
Lexus Fanatic
04-20-10, 08:04 AM
#18
Lexus Fanatic
If you read this thread you will notice the cheap supersized tire/wheel combos here are extremely heavy compared to the OEM VW setup.
btw, this info is well known to most enthusiasts, good article.
04-20-10, 09:12 AM
#20
Lexus Fanatic
I did read it. And I think that Byprodrive made some good points
Originally Posted by Byprodrive
Increasing the weight of your wheel & tire combo is probably the worst place to add weight if acceleration, braking, handling, or ride comfort is important to you. Increasing the diameter of your wheels allows you to reduce the sidewall height of the tire without altering the diameter. Reducing tire sidewall height increases road "feel" whether wanted or not & reduces impact resistance. (leading cause of sidewall "bubbles") Increased wheel diameter also increases rotational inertia which resists acceleration & deceleration. Moving the mass or weight further from the axle or axis (bigger wheels) increases the leverage the mass has to resist change (acceleration &/or deceleration).
04-20-10, 09:27 AM
#21
Lexus Fanatic
That shows how much lighter a lot of stock and non-alloy wheels have gotten over the years. At one time, aftermarket alloys, even some oversize ones, were considerably lighter than most stock wheels. Alloys, especially aftermarket ones, are made of special, light weight materials.....one reason for their relatively high expense.
Today the better alloy wheels are lighter than stock wheels, even the better cast wheels are under the weight of the OEM wheels.Back on topic, the article really points out the degradation that occurs with adding unsprung weight.
Pearlpower brings up good points that would have made the article more meaningful.
04-20-10, 09:30 AM
#22
That shows how much lighter a lot of stock and non-alloy wheels have gotten over the years. At one time, aftermarket alloys, even some oversize ones, were considerably lighter than most stock wheels. Alloys, especially aftermarket ones, are made of special, light weight materials.....one reason for their relatively high expense.
04-20-10, 10:53 AM
#23
Guest
Posts: n/a
Thanks
Weak article, what would have been interesting would be a test of larger yet lighter wheel vs the next size down. We all know the heavier the slower with associated decreases in performance/MPG.
Whereas some claim weight is everything, others will counter that the larger yet lighter wheel would be hampered by the rotating mass being further out, therefore offsetting any performance gained with the lighter wheels.
Whereas some claim weight is everything, others will counter that the larger yet lighter wheel would be hampered by the rotating mass being further out, therefore offsetting any performance gained with the lighter wheels.
04-20-10, 10:59 AM
#24
Lexus Fanatic
But I think many of the enthusiasts on CL are better informed and do take into account tire/wheel weight when making selections. At least that is my observation of many of IS and IS-F owners on CL. But to your point, CL members are not most people.
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