Lets put this debate to bed: 45 series tires/18" wheel Toyota shout out
05-16-19, 08:20 AM
#61
Lexus Fanatic
If there are no typos, then this did not come from the factory.
The factory choices were 225/40-18 & 255/35-18, OR, 225/35-19 & 255/30-19.
If the "friend" mounted 225/40R19 and 255/35R19. then he will have 1" more diameter, because the rubber stayed the same, and the rim is 1" more. Hope that clarifies.
05-16-19, 08:24 AM
#62
Lexus Fanatic
05-17-19, 11:07 AM
#63
Lexus Fanatic
I already defined it in my first post. Ride is how soft or stiff the suspension tuning is. One could ride around on steel wheels and the car could still "float" over irregular pavement. Would it be comfortable? Of course not, NVH, being the determining factor, not ride.
The definition of "Ride Quality":
Ride quality refers to a vehicle's effectiveness in insulating the occupants from undulations in the road surface (e.g., bumps or corrugations). A vehicle with good ride quality provides a comfort for the driver and passengers.
https://www.ridetech.com/info/tech/w...-ride-quality/
The tires and suspension bushings also greatly influence ride quality. Most OEM suspensions use large soft rubber bushings and tall tires to enhance ride quality and noise transmission. Some street rodders like to use polyurethane bushings and short sidewall tires. It is especially tough to get a decent ride quality with such a combination.
Last edited by SW17LS; 05-17-19 at 11:19 AM.
05-17-19, 11:34 AM
#64
drives cars
This is what I am referring to.
If there are no typos, then this did not come from the factory.
The factory choices were 225/40-18 & 255/35-18, OR, 225/35-19 & 255/30-19.
If the "friend" mounted 225/40R19 and 255/35R19. then he will have 1" more diameter, because the rubber stayed the same, and the rim is 1" more. Hope that clarifies.
If there are no typos, then this did not come from the factory.
The factory choices were 225/40-18 & 255/35-18, OR, 225/35-19 & 255/30-19.
If the "friend" mounted 225/40R19 and 255/35R19. then he will have 1" more diameter, because the rubber stayed the same, and the rim is 1" more. Hope that clarifies.
Also: https://tiresize.com/tires/BMW/335i/2014/Sedan-M-Sport/
With this information, we can see that the BMW has a larger tire diameter, but the same aspect ratio. Since aspect ratio is based on tire width, there's an equal amount of sidewall on a 225/40 tire of any wheel size.
05-17-19, 11:52 AM
#65
Lexus Fanatic
I confirmed these tire sizes in person, incidentally.
Also: https://tiresize.com/tires/BMW/335i/2014/Sedan-M-Sport/
With this information, we can see that the BMW has a larger tire diameter, but the same aspect ratio. Since aspect ratio is based on tire width, there's an equal amount of sidewall on a 225/40 tire of any wheel size.
Also: https://tiresize.com/tires/BMW/335i/2014/Sedan-M-Sport/
With this information, we can see that the BMW has a larger tire diameter, but the same aspect ratio. Since aspect ratio is based on tire width, there's an equal amount of sidewall on a 225/40 tire of any wheel size.
When you say 225/40 is the same sidewall of any diameter, 12, 14, 16, 18, 20, 22, we are not disagreeing. 40% of 225 is 40% of 225. It's the hole in the middle that changes. When the hole gets bigger, the sidewall needs to get smaller, so that the overall diameter is the same. So it could be 255/35-18 for 18, and 255/30-19 for 19. It won't be 255/35-19 when we are talking about the same car. But we weren't.
It's all good!
05-17-19, 01:36 PM
#66
drives cars
Gotcha, you're talking about a F30. BMW increased the profiles, the 255/35-18 rears is a E9x. The 19's on a E9x were 30's.
When you say 225/40 is the same sidewall of any diameter, 12, 14, 16, 18, 20, 22, we are not disagreeing. 40% of 225 is 40% of 225. It's the hole in the middle that changes. When the hole gets bigger, the sidewall needs to get smaller, so that the overall diameter is the same. So it could be 255/35-18 for 18, and 255/30-19 for 19. It won't be 255/35-19 when we are talking about the same car. But we weren't.
It's all good!
When you say 225/40 is the same sidewall of any diameter, 12, 14, 16, 18, 20, 22, we are not disagreeing. 40% of 225 is 40% of 225. It's the hole in the middle that changes. When the hole gets bigger, the sidewall needs to get smaller, so that the overall diameter is the same. So it could be 255/35-18 for 18, and 255/30-19 for 19. It won't be 255/35-19 when we are talking about the same car. But we weren't.
It's all good!
But yeah the ride quality was actually quite nice in that car - I was surprised considering it was the "sportiest" non-M 3-series of the pre-refresh F30.
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