tyre size help
tyre size help
15-09-2018, 02:31 AM
i have been offered a set of tyres for nothing from a mate but not sure if they would fit my standard 17" lexus alloy wheel
i have on the car 215/45/17 and these are 215/40/17 would this make any difference and would they be ok on the rim
please help i useless when it comes to tyres
![[Image: FB_IMG_1474048273787_zpsnbfq6a3s.jpg]](http://i1227.photobucket.com/albums/ee440/davis5835/Mobile%20Uploads/FB_IMG_1474048273787_zpsnbfq6a3s.jpg)
hi all,
i have been offered a set of tyres for nothing from a mate but not sure if they would fit my standard 17" lexus alloy wheel
i have on the car 215/45/17 and these are 215/40/17 would this make any difference and would they be ok on the rim
please help i useless when it comes to tyres
15-09-2018, 02:42 AM
Edited 27-10-2011, 12:17 PM by SHAHZ.
Tinted Glass-Sports Grill-Debadged-TTE Spoiler-TTE Lowering Springs-PLUK Kazama Exhaust-18" Aero Alloys-K&N Air Filter-Denso Iridium Power Spark Plugs-Quad Tail Light Conversion-6000K HID-X-White High Beam-6 LED Sidelights-Quad LED Boot Light-JDM OEM Smoked Front Fogs-JDM Blue Reverse Bulbs-LS430 Smoked Side Repeaters-6 LED Side Repeaters-Chrome Indicator Bulbs-Alpine HU-Rear Headrest Monitors-PIAA Super Sporza-Fan Washer Jets-Lex Tax Disc Holder-Chrome Gear Knob-2003 Cup Holder-Toyo Proxes T1-R
the number 40 is the sidewall profile mate, so it will be 5mm lower than the 45 you currently have, will fit, just means a slightly harsher ride! but that is well and truley compensated for when they are free
Tinted Glass-Sports Grill-Debadged-TTE Spoiler-TTE Lowering Springs-PLUK Kazama Exhaust-18" Aero Alloys-K&N Air Filter-Denso Iridium Power Spark Plugs-Quad Tail Light Conversion-6000K HID-X-White High Beam-6 LED Sidelights-Quad LED Boot Light-JDM OEM Smoked Front Fogs-JDM Blue Reverse Bulbs-LS430 Smoked Side Repeaters-6 LED Side Repeaters-Chrome Indicator Bulbs-Alpine HU-Rear Headrest Monitors-PIAA Super Sporza-Fan Washer Jets-Lex Tax Disc Holder-Chrome Gear Knob-2003 Cup Holder-Toyo Proxes T1-R
15-09-2018, 03:46 AM
On the plus side, you will have a slightly lower, though slightly harsher ride, and this should boost both handling and acceleration a tiny bit. On the downside, the tyres may look a bit skinny and the overall wheel size may look too small, your speedo will read under a couple of percent and top speed will drop marginally.
Info for you below:
(The forum always murders table formatting! The first figure is for the stock tyre and the second figure for your proposed new one, for each respective aspect.)
Diameter: 625.3mm 603.8mm
Circumference: 1964.4mm 1896.9mm
Speedo error: 0% 3.56%
Reading at 30mph: 30mph 31.07mph
Reading at 60mph: 60mph 62.14mph
Ride height loss: 0mm 10.75mm
Arch gap increase: 0mm 10.75mm
Edited 27-10-2011, 01:21 PM by Stoney.
![[Image: tempsig2.jpg]](http://i121.photobucket.com/albums/o227/84stoney/tempsig2.jpg)
ad: It was a tough call to make, but the Supercharged IS200 is being retired. ad:Will fit just on the wheels perfectly mate.
On the plus side, you will have a slightly lower, though slightly harsher ride, and this should boost both handling and acceleration a tiny bit. On the downside, the tyres may look a bit skinny and the overall wheel size may look too small, your speedo will read under a couple of percent and top speed will drop marginally.
Info for you below:
(The forum always murders table formatting! The first figure is for the stock tyre and the second figure for your proposed new one, for each respective aspect.)
Diameter: 625.3mm 603.8mm
Circumference: 1964.4mm 1896.9mm
Speedo error: 0% 3.56%
Reading at 30mph: 30mph 31.07mph
Reading at 60mph: 60mph 62.14mph
Ride height loss: 0mm 10.75mm
Arch gap increase: 0mm 10.75mm
ad: It was a tough call to make, but the Supercharged IS200 is being retired. ad:
15-09-2018, 03:56 AM
SHAHZ the number 40 is the sidewall profile mate, so it will be 5mm lower than the 45 you currently have, will fit, just means a slightly harsher ride! but that is well and truley compensated for when they are free
You are right that the second number is height, but it is not in mm. It is as a percentage of the width. So 215/45/17 is 215mm wide on a 17" rim, but the sidewall height is 215mm x 45% = 96.75mm. 215/40/17 is 215mm wide on a 17" rim but with a sidewall height of 215mm x 40% = 86mm. A difference in this case of 10.75mm. This is each side, so overall the wheels will be 21.5mm smaller in diameter, though only 10.75mm difference in ride height, seeing as only the half of the wheel below the axle effects the height of the car, the other 10.75mm difference is in the extended gap between the top of the tyre and the arch.
Effectively; the car will drive like it's been lowered 1cm, but look like it's been raised 1cm!
ad: It was a tough call to make, but the Supercharged IS200 is being retired. ad:SHAHZ the number 40 is the sidewall profile mate, so it will be 5mm lower than the 45 you currently have, will fit, just means a slightly harsher ride! but that is well and truley compensated for when they are free
You are right that the second number is height, but it is not in mm. It is as a percentage of the width. So 215/45/17 is 215mm wide on a 17" rim, but the sidewall height is 215mm x 45% = 96.75mm. 215/40/17 is 215mm wide on a 17" rim but with a sidewall height of 215mm x 40% = 86mm. A difference in this case of 10.75mm. This is each side, so overall the wheels will be 21.5mm smaller in diameter, though only 10.75mm difference in ride height, seeing as only the half of the wheel below the axle effects the height of the car, the other 10.75mm difference is in the extended gap between the top of the tyre and the arch.
Effectively; the car will drive like it's been lowered 1cm, but look like it's been raised 1cm!
ad: It was a tough call to make, but the Supercharged IS200 is being retired. ad:
15-09-2018, 09:57 AM
SHAHZ the number 40 is the sidewall profile mate, so it will be 5mm lower than the 45 you currently have, will fit, just means a slightly harsher ride! but that is well and truley compensated for when they are free
No side wall it a percentage of the tyre width.
"Life's goal is not to arrive safely at the grave in a well preserved body. But, rather to skid in sideways........
totally worn out and broken, shouting 'Holy ****, WHAT A RIDE!'"
FirebirdPhil
15-09-2018, 09:57 AM #6SHAHZ the number 40 is the sidewall profile mate, so it will be 5mm lower than the 45 you currently have, will fit, just means a slightly harsher ride! but that is well and truley compensated for when they are free
No side wall it a percentage of the tyre width.
"Life's goal is not to arrive safely at the grave in a well preserved body. But, rather to skid in sideways........
totally worn out and broken, shouting 'Holy ****, WHAT A RIDE!'"
15-09-2018, 10:07 AM
and im happy that they will fit so ill be sorting these out soon before the weather gets any worse
15-09-2018, 10:44 AM
Stoney Is there an echo in here?
I missed your post as I just hit quote without reading the thread - I do that its big and clever:whistling:
"Life's goal is not to arrive safely at the grave in a well preserved body. But, rather to skid in sideways........
totally worn out and broken, shouting 'Holy ****, WHAT A RIDE!'"
FirebirdPhil
15-09-2018, 10:44 AM #9Stoney Is there an echo in here?
I missed your post as I just hit quote without reading the thread - I do that its big and clever:whistling:
"Life's goal is not to arrive safely at the grave in a well preserved body. But, rather to skid in sideways........
totally worn out and broken, shouting 'Holy ****, WHAT A RIDE!'"
15-09-2018, 10:46 AM
the first 3 numbers are in mm ( 215)
the next 2 numbers are a % of the first
and the last 2 numbers are in inches
what a mess
and i work with this every day
jay_russell
15-09-2018, 10:46 AM #10it's so crazy with tyre sizes,
the first 3 numbers are in mm ( 215)
the next 2 numbers are a % of the first
and the last 2 numbers are in inches
what a mess and i work with this every day
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