W205 19 wheels setup advice
03-27-2017, 02:10 AM
#1
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W205
W205 19 wheels setup advice
Hi there,
First I would like to thank you for having this forum, although I am a new member here I have visited many times and have gained tons of useful info. So thank you!
Just got my w205 recently, loving the car but could not wait too long before I started thinking about the mods
So, I just got a sweet deal for OEM W204 C63 multispoke alloy wheels with size 8x19 ET45 & 9x19 ET54. I was wondering what do you think would be the best tyre size for these, taking in consideration that there are lots of potholes in my country?
First I would like to thank you for having this forum, although I am a new member here I have visited many times and have gained tons of useful info. So thank you!
Just got my w205 recently, loving the car but could not wait too long before I started thinking about the mods
So, I just got a sweet deal for OEM W204 C63 multispoke alloy wheels with size 8x19 ET45 & 9x19 ET54. I was wondering what do you think would be the best tyre size for these, taking in consideration that there are lots of potholes in my country?
03-27-2017, 09:29 AM
#3
MBWorld Fanatic!
Since your new wheels are 1" wider (I'm pretty sure they are...the 18's are 7.5/8.5), if you currently have 19" wheels/tires, you can re-use your existing tires. However, they will be stretched over the extra inch (1/2" on each side). There's not a great deal of harm in the stretch, but you'll lose curb protection since the outside edge of the wheel will be exposed. The tires may also wear a little quicker.
If you're buying new tires, I'd get some added width to fit the wider rims. One inch = 25mm, so your 225/40 would ideally become 250/40 (225mm + 25mm) and your 255/40 would become 280/40. Since those sizes don't exist, the closest call would be 245/40 up front and 275/35 rears.
The sidewall height is a ratio of the tread width, so a 225/40 tire has a sidewall that's 40% of the tire width (225 x .40= 90mm sidewall height). When you increase tire width but keep the same sidewall ratio you end up with a taller sidewall (245 x .40 = 98mm). If you're concerned with road conditions you may want the extra 8mm cushion, although the sidewall profile might look a little meatier than you'd like.
You could also step down the sidewall ratio to 245/35=85mm front sidewall and 275/30=82.5mm rear sidewall which would ride a little stiffer but look more aggressive.
So, if ride quality and protecting rims from getting bent in potholes:
245/40 Front, 275/35 Rear
If the look is more a priority:
245/35 Front and 275/35 Rear
If you're buying new tires, I'd get some added width to fit the wider rims. One inch = 25mm, so your 225/40 would ideally become 250/40 (225mm + 25mm) and your 255/40 would become 280/40. Since those sizes don't exist, the closest call would be 245/40 up front and 275/35 rears.
The sidewall height is a ratio of the tread width, so a 225/40 tire has a sidewall that's 40% of the tire width (225 x .40= 90mm sidewall height). When you increase tire width but keep the same sidewall ratio you end up with a taller sidewall (245 x .40 = 98mm). If you're concerned with road conditions you may want the extra 8mm cushion, although the sidewall profile might look a little meatier than you'd like.
You could also step down the sidewall ratio to 245/35=85mm front sidewall and 275/30=82.5mm rear sidewall which would ride a little stiffer but look more aggressive.
So, if ride quality and protecting rims from getting bent in potholes:
245/40 Front, 275/35 Rear
If the look is more a priority:
245/35 Front and 275/35 Rear
03-27-2017, 11:08 AM
#4
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Since your new wheels are 1" wider (I'm pretty sure they are...the 18's are 7.5/8.5), if you currently have 19" wheels/tires, you can re-use your existing tires. However, they will be stretched over the extra inch (1/2" on each side). There's not a great deal of harm in the stretch, but you'll lose curb protection since the outside edge of the wheel will be exposed. The tires may also wear a little quicker.
If you're buying new tires, I'd get some added width to fit the wider rims. One inch = 25mm, so your 225/40 would ideally become 250/40 (225mm + 25mm) and your 255/40 would become 280/40. Since those sizes don't exist, the closest call would be 245/40 up front and 275/35 rears.
The sidewall height is a ratio of the tread width, so a 225/40 tire has a sidewall that's 40% of the tire width (225 x .40= 90mm sidewall height). When you increase tire width but keep the same sidewall ratio you end up with a taller sidewall (245 x .40 = 98mm). If you're concerned with road conditions you may want the extra 8mm cushion, although the sidewall profile might look a little meatier than you'd like.
You could also step down the sidewall ratio to 245/35=85mm front sidewall and 275/30=82.5mm rear sidewall which would ride a little stiffer but look more aggressive.
So, if ride quality and protecting rims from getting bent in potholes:
245/40 Front, 275/35 Rear
If the look is more a priority:
245/35 Front and 275/35 Rear
If you're buying new tires, I'd get some added width to fit the wider rims. One inch = 25mm, so your 225/40 would ideally become 250/40 (225mm + 25mm) and your 255/40 would become 280/40. Since those sizes don't exist, the closest call would be 245/40 up front and 275/35 rears.
The sidewall height is a ratio of the tread width, so a 225/40 tire has a sidewall that's 40% of the tire width (225 x .40= 90mm sidewall height). When you increase tire width but keep the same sidewall ratio you end up with a taller sidewall (245 x .40 = 98mm). If you're concerned with road conditions you may want the extra 8mm cushion, although the sidewall profile might look a little meatier than you'd like.
You could also step down the sidewall ratio to 245/35=85mm front sidewall and 275/30=82.5mm rear sidewall which would ride a little stiffer but look more aggressive.
So, if ride quality and protecting rims from getting bent in potholes:
245/40 Front, 275/35 Rear
If the look is more a priority:
245/35 Front and 275/35 Rear
So the ones you posted (8x19 ET45 & 9x19 ET54) are 0.5" wider.
Take everything that Mike5215 said and half it since he did his calculations based on a 1" wider wheel.
03-27-2017, 02:11 PM
#5
MBWorld Fanatic!
Right, sorry about that. I've got W221 widths hardwired into my brain apparently. For the half inch total difference I'd just run the OEM tire sizes like the first guy said. It's a stretch but it's small. Disregard my novel.
08-03-2017, 05:30 AM
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w205 c220d
w205 19 inch wheels and tyre size
hi guys i have a w205 c220d currently on 18 inch oem wheels. i am changing to 19 inch 19*8.5 front and 19*9.5 rear
Can you advise on tyre size? i was advised 235 35 19 for the front and 265 30 19 for the rear, i just think the rear 30 profile will be too low and the car may not look nice unless lowered
Any advise is welcomed
Can you advise on tyre size? i was advised 235 35 19 for the front and 265 30 19 for the rear, i just think the rear 30 profile will be too low and the car may not look nice unless lowered
Any advise is welcomed
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08-03-2017, 09:03 AM
#8
MBWorld Fanatic!
They'll have virtually identical side wall profiles. The rear sidewalls are 2mm shorter than the fronts, which would be visually imperceptible.
"30" or "35" isn't a size, it's a ratio. To get the actual size, multiply the tread width (the first number in the tire size...235,265 etc) by the ratio. (265 x .30 etc.)
Since the rear tire is wider, the lower sidewall ratio results in a tire that has the same sidewall height as the front tire, which has a higher ratio but a more narrow tread width.
The sizes you listed are fine.
"30" or "35" isn't a size, it's a ratio. To get the actual size, multiply the tread width (the first number in the tire size...235,265 etc) by the ratio. (265 x .30 etc.)
Since the rear tire is wider, the lower sidewall ratio results in a tire that has the same sidewall height as the front tire, which has a higher ratio but a more narrow tread width.
The sizes you listed are fine.
