!..Effects of large tyres..!

[SAABi]

My new civic has tyres 195/65/R15....

Ive been browsing, and i came to kno that Honda provides 205/55/R16 in JDM civic, and elsewhere in the world too...

Wht if i install 215/60/R16, or 215/50/R17?

I kno there wud b a huge difference on the comfort of the car, and it wud not at all b positive....

But still, ive heard that big tyres affect the fuel consumption of the car...

PLZz comment..

[SAABi]

[bkahive1]

@Saabi
The normal formula to follow is simple. Stick with your original rim size then use +10 and -10 formula e.g.

Your original tyre size
195/65/R15
Your new tyre size should be something like
205/55/R15
This way you speedometer will be pretty accurate since the tyre will have the same circumference and cover same distance in one revolution.

As regards your question, you will have a bit stiffer ride and load on your suspension will increase. Remember Japanese roads are much much better (you know ofcourse) and having low profile tyres does not make much difference. In our Pakistan, its a different story.

[ahsen_rg]

with 195/65/r15, ur speedo error will be 0%, overall dia will be 25"... side wall 5"

1)with 215/60/r16, ur speedo error will be 4.7%, overall dia greater by 1.2"... side wall 5.1"

2)with 215/55/r16, ur speedo error will be 1.3%, overall dia greater by 0.3"... side wall 4.7"

3)with 215/50/r17, ur speedo error will be 1.9%, overall dia greater by 0.5"... side wall 4.2"

4)with 215/55/r17, ur speedo error will be 5.3%, overall dia greater by 1.3"... side wall 4.7"

although they dun recommend the offset to be greater than 2.5%, but personally i might try 215/55/r17... (so that with 4.7 sidewall the ride aint that hard)

for u i'll recommend #2 or #3...

btw, i wud like to clear one confusion (experts needed please)... cuz i think that fuel consumption depends only on the tyre width, not on the rim size/tyre profile (there will be a lil difference cuz of the wieght of the rim, but not much...).... is it not so??

i mean if i get a larger dia wheel, with speedo error, yeah it might look that my fuel consumption has dropped cuz of the less odometer reading, but actually it'll be the same...

thnx

[fastoriel]

ahsan bhai :S ... kash mujay bhe tires ki samajh lag jati haha very hard to learn abt tires ...

[SER_GTR]

Hello!
well its nothing but if you but some bigger Dia Tyres with more width...you end up killing Wheel Bearing Earlier and suspension as well....! also incorrect speedo readups....!
well if you try to reduce speedo error.. youy have to use some Low Profile Tyres which might be too hard on suspension as you better know the road conditions out there........taking luxury outta ride...
i won't recommend low profiles on roads like Khi.....!
Thanxx

[RedBull_ar]

btw, i wud like to clear one confusion (experts needed please)... cuz i think that fuel consumption depends only on the tyre width, not on the rim size/tyre profile (there will be a lil difference cuz of the wieght of the rim, but not much...).... is it not so??

larger rims, higher weight, more inertia, more energy required to make them move, and than stop em,

u wear ur brakes more every time u brake and u consume more petrol every time u accelarate.

[levin]

who watches the speedmeter anyway in Pk. stiff rides from sexy tires, soft rides from plump fat tires.

[ahsen_rg]

so its JUST the weight of the rims and that would be arnd 10kgs i guess... not much,

cuz otherwise next time we'll be telling ppl about my cars consumption to be 9km/l wen i'm sitting in the car and 10km/l wen ur sitting in the car...

[Storm]

@SAABi
195/65R15=634mm diameter OEM Size
215/60R16=664mm diameter
215/50R17=647mm diameter
215/55R17=668mm diameter

To maintain your original size you'd need one of the following:
205/55R16=632mm
225/50R16=631mm
205/55R17=637mm
225/45R17=634mm

@redbull_ar & ahsen_rg
(Y) Great info

[SAABi]

Thnx to all ho contributed!

sab der se aae par durust aae

I think i'll go for 215/50/R17 as ahsen bhai said...

@storm:
wht wud b the dia of 225/50/R17? wud u recomend this tyre on the 06 civic?

REGARDZz to all

[Jazzman]

well bhai log aap ne jo info di it rocks...
but aik baat to batao the larger rims actually have more weight but the tyre weighs less also doesn't it.. so i think it cancels each other..

but if the tyre is more broad... it has more grip... so more grip means alot more to overcome for the engine and alot more friction. the engine revs up more as if it was around 50 kg heaver or so.. thats why the engine consumes more fuel and is exhausted earlier...

Am i right....

[guy4u]

its increases the fuel consumption, and also its a big headache, if u have big rims most of the time your car alighment go out due to the bad condition of roads.

[sami_voodoo]

If you want to improve grip (and improve mileage a bit (y)), try inflating your tires a bit more - about 5 PSi should do it. Steel wheels and the original tires are probably lighter than what you'll have if you change to fat alloys. If you want to go for looks, well that's another thing altogether.

IMHO though, if you want to look for a good "performance" profile, look at what the racers use in touring car races. that'll give a rough idea of the tire size for max performance for a particular car.

[alphaX]

SAABi....check this URL out for moving to a bigger size.

http://www.discountedwheelwarehouse.com/Wheel_Fitment_Guide.cfm

[Storm]

[highlight]

Reply By : SAABi on 3/14/2007 9:34:51 AM
Thnx to all ho contributed!

sab der se aae par durust aae

I think i'll go for 215/50/R17 as ahsen bhai said...

@storm:
wht wud b the dia of 225/50/R17? wud u recomend this tyre on the 06 civic?

REGARDZz to all[/highlight]

i can see the reasoning behind ahsens post, but i shoudl point out that you WILL throw off your speedometer by 2.05% (but that IS fully acceptable by most auto manufacturers).

the dia of 225/50R17=657mm whih is 3.63% too large (not advisable at all)

[ahsen_rg]

ahh, after this post i too was excited n tempted once again, and chked all the shops here n found a good 17" rim

have asked him to tell me abt the availability of the tyres in the 215/50/r17 range...
he only had dunlop sp9000 for 7500... well i'd love to get yokohama avs soprts though...

@SAABi, naa, dun go for 225/50/r17... one more point to note is the price of the tyre as 215/45/r17 pirelli is for 10k, and 225,50,r17 is for 18k:|

[RedBull_ar]

n found a good 17" rim

read paindo, type R, wanna bee

[ahsen_rg]

heres the pic of wat i found/liked...

[Storm]

@ahsen_rg
that's a hot looking rim buddy (Y), lemme know if you need any help at pirelli (i know omer pretty well)

@redbull
LOL!! arey chor upney bhai ka peechay