rims
08-28-07, 10:21 AM
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rims
Alright people, just wanted to get some feedback on rim sizes. Im debating on what size of rims to get for my lex. Its a 94 gs300. 20" or 22". If any one has 22" let me know how the drive feels.
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08-29-07, 02:07 PM
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Trivia for the day:
Putting on larger wheels will impact acceleration. I actually did a little research on this a while ago and had to find the formula online. The formula for calculating a final drive ratio is prop shaft turns over rear wheel turns. For example lets say the prop shaft turns 49 times and the wheels rotate 24 times. Mulitply the 49 prop shaft turns by 2 because the moving wheel rotates at double speed because of its own motion plus the extra forward motion from the differential spider gear rotating along the stationary gear of the fixed wheel. Divide that by 24 wheel rotations. Your final drive is 4.083 which I believe is factory Lexus. Add a wheel 5% larger and it takes more rotations of the wheel to equal the same 49 turns. So 2 x 49 = 98 divided by 25.2 for the larger wheel = 3.88 final drive. Not a huge difference but it proves that a bigger wheel will slow down acceleration, not only from weight, but from diameter. When buying tires and deciding on profile, you might want to see the height in inches of the OEM tires and get as close as you can if you want to keep the factory ratio.
Putting on larger wheels will impact acceleration. I actually did a little research on this a while ago and had to find the formula online. The formula for calculating a final drive ratio is prop shaft turns over rear wheel turns. For example lets say the prop shaft turns 49 times and the wheels rotate 24 times. Mulitply the 49 prop shaft turns by 2 because the moving wheel rotates at double speed because of its own motion plus the extra forward motion from the differential spider gear rotating along the stationary gear of the fixed wheel. Divide that by 24 wheel rotations. Your final drive is 4.083 which I believe is factory Lexus. Add a wheel 5% larger and it takes more rotations of the wheel to equal the same 49 turns. So 2 x 49 = 98 divided by 25.2 for the larger wheel = 3.88 final drive. Not a huge difference but it proves that a bigger wheel will slow down acceleration, not only from weight, but from diameter. When buying tires and deciding on profile, you might want to see the height in inches of the OEM tires and get as close as you can if you want to keep the factory ratio.
08-29-07, 04:03 PM
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08-29-07, 08:01 PM
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Trivia for the day:
Putting on larger wheels will impact acceleration. I actually did a little research on this a while ago and had to find the formula online. The formula for calculating a final drive ratio is prop shaft turns over rear wheel turns. For example lets say the prop shaft turns 49 times and the wheels rotate 24 times. Mulitply the 49 prop shaft turns by 2 because the moving wheel rotates at double speed because of its own motion plus the extra forward motion from the differential spider gear rotating along the stationary gear of the fixed wheel. Divide that by 24 wheel rotations. Your final drive is 4.083 which I believe is factory Lexus. Add a wheel 5% larger and it takes more rotations of the wheel to equal the same 49 turns. So 2 x 49 = 98 divided by 25.2 for the larger wheel = 3.88 final drive. Not a huge difference but it proves that a bigger wheel will slow down acceleration, not only from weight, but from diameter. When buying tires and deciding on profile, you might want to see the height in inches of the OEM tires and get as close as you can if you want to keep the factory ratio.
Putting on larger wheels will impact acceleration. I actually did a little research on this a while ago and had to find the formula online. The formula for calculating a final drive ratio is prop shaft turns over rear wheel turns. For example lets say the prop shaft turns 49 times and the wheels rotate 24 times. Mulitply the 49 prop shaft turns by 2 because the moving wheel rotates at double speed because of its own motion plus the extra forward motion from the differential spider gear rotating along the stationary gear of the fixed wheel. Divide that by 24 wheel rotations. Your final drive is 4.083 which I believe is factory Lexus. Add a wheel 5% larger and it takes more rotations of the wheel to equal the same 49 turns. So 2 x 49 = 98 divided by 25.2 for the larger wheel = 3.88 final drive. Not a huge difference but it proves that a bigger wheel will slow down acceleration, not only from weight, but from diameter. When buying tires and deciding on profile, you might want to see the height in inches of the OEM tires and get as close as you can if you want to keep the factory ratio.
very informative
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