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Old 3rd November 2007, 06:50   #1
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Default upgrade from 14" to 15"

hi guys,i would like to upgrade the tires on my fiat Siena 1.6 and nhc zx from 14" to 15".currently the fiat siena is running on 175/65R14 while the nhc is running on 195/60R14.i will be upgrading to 205/50R15.
1.will this size be overkill for the two cars?
2.is there any other size i can opt for in 15"?
3.will the 205/50R15 foul with the wheel arches or rub against the fender.also if 3 people sit in the rear,will they scrape then?
4.is 185/55R15 available in india,cos that is the best up size in 15",and the Thai nhc vtec comes shod with the same tire profile.
5.are 195/55R15 and 195/50R15 incorrect upsizes.
6.what tires should i look at?
i have to some extent shortlisted between yokohama's and michelin's.though i have the zen and vtec running on michelin xm1's and im very satisfied with the tires,i'm still looking for a change.these are the tires that im thinking about.
1.Michelin pilot precedas
2.Yokohama avs es100
3.Yokohama s-drives
4.probably bridgestone potenza giii'.
now since i am upgrading to 15",i would prefer to opt for a softer compound tire which would give me good ride quality.
the reason why i am upgrading to 15" is that both of the cars look grossly under tired.fuel efficiency is not a concern.
ride quality is a concern,which only can be rectified by good soft compound tires.(14" to 15" upgrade has to happen).

Last edited by hellspawn : 3rd November 2007 at 06:52.
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Old 3rd November 2007, 09:56   #2
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I have 205/50 R15s (Pilot Precedas) on my Palio. Mostly the same as the Siena I guess.

No tyre fouling while taking turns, even at full lock..

But the rear wheel arches do foul when there are passengers in the back. The tyres stick out just a bit, beyond the lip of the wheel arches, and the lip hits/scrubs/cuts the tyres when I hit a gutter with 2 (male) passengers in back. I think 195s will not have this issue. 185s will definitely not.

If ride quality is an issue, you will feel a bit of a difference (less comfort) with lower profile tyres. I don't think the "comfort" category tyres (like Michelin Energy) are available in 50 or 55 profile. (Not fully sure about this, though.)

Pilot Precedas are not exactly comfort tyres. But they are definitely performance tyres.
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Old 3rd November 2007, 10:44   #3
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Quote:
Originally Posted by hellspawn View Post
hi guys,i would like to upgrade the tires on my fiat Siena 1.6 and nhc zx from 14" to 15".currently the fiat siena is running on 175/65R14 while the nhc is running on 195/60R14.i will be upgrading to 205/50R15.
1.will this size be overkill for the two cars?
.
I feel 195/60-14 is more than sufficient for both cars..Its also the optimum balance b/w ride quality and performance
Quote:
Originally Posted by hellspawn View Post
2.is there any other size i can opt for in 15"?
.
I've seen few NHC with 195/55-15 S drives
Quote:
Originally Posted by hellspawn View Post
3.will the 205/50R15 foul with the wheel arches or rub against the fender.also if 3 people sit in the rear,will they scrape then?
.
205/50-15 will scrape the quarter panel with load at the back
Quote:
Originally Posted by hellspawn View Post
4.is 185/55R15 available in india,cos that is the best up size in 15",and the Thai nhc vtec comes shod with the same tire profile.
.
I dont think u will find 15" 185 tyres
Quote:
Originally Posted by hellspawn View Post
5.are 195/55R15 and 195/50R15 incorrect upsizes.
.
195/50-15 is the correct size but i've seen many NHC with 195/55-15 running without any issues
Quote:
Originally Posted by hellspawn View Post
6.what tires should i look at?
i have to some extent shortlisted between yokohama's and michelin's.though i have the zen and vtec running on michelin xm1's and im very satisfied with the tires,i'm still looking for a change.these are the tires that im thinking about.
1.Michelin pilot precedas
2.Yokohama avs es100
3.Yokohama s-drives
4.probably bridgestone potenza giii'.
.
All the tyres u have short listed are performance tyres so dont expect great ride quality from them
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Old 3rd November 2007, 11:28   #4
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1. Yes, 195's are more than enough.
2. 195/50 r15 would be ideal.
3. In all probability, yes there will be fouling.
4. Nope, not available.
5. 195/55 is wrong (just out of tolerance), 195/50 is ok.
6. For comfort, in 195/50 you don't have a choice. Only options are Michelin PP 2's or Yokohama S-Drives.
7. 15", 50-profile there are no comfort tyres, only performance tyres are available.
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Old 4th November 2007, 06:21   #5
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right,that narrows down the options to 195/50R15 and 195/55R15 for the siena.
what about the honda?can the honda take 205/50R15 sized tires?the reason why i am asking is that,my dad saw a nhc running 205 tires and is hell bent on getting those fitted as the nhc was looking damn good and proportionately tired.
anybody running the same spec tires on their nhc's.

the tire calculator shows 1.2%(fast) difference for the 195/50R15 and 2.1%(slow) for the 195/55R15.i am inclined more towards the 195/55R15 as it offers me a substantial increase in the sidewall height,thus providing a better cushion on bumps.i reckon,the limit is 2% so should the .1% be a cause for concern.will the 195/55R15 fill out the wheel arches on the nhc.
As the nhc is running on 195/60R14 with stock honda alloys(width 5.5j,i think).will shifting to 195/55R15 with 6.5J rims lead to a visual increase in size,probably because the tires would wrap around the rims better.

Last edited by hellspawn : 4th November 2007 at 06:28.
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Old 4th November 2007, 06:57   #6
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Default NhC 205/50r15

to add to the query on 205/50r15 for the nhc,a lot of members with ohc's are running 205/50r15 like manveet,ford rocam.
a fellow member mike3d is running 205/55R15.gto is running on 205/xxR16's!
cant the nhc take 205/50R15's without the rear wheel wells scraping?
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Old 4th November 2007, 09:22   #7
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Well I am running with 205/50/R15 on my petra, which is exactly same circumfrence as of 175/65/r14 ( approx. 0.02% difference).
I am sure that tyres does not touch the wheel wells but it does foul with the rear fender's sharp edges which can cut the side walls of the tyres when car is loaded and goes through some rough roads, This is because the tyres are too wide to fit in the wheel wells and comes out a bit. An option is that you can ask the installer to turn the sharp edges inside to that it does not cut the tyres. But I think 195/55/R15 is better choice because the tyres will remain in the wells and will not touch the sharp edges of the rear wells.

PS:Front tryes does not have any problem with 205/50/R15 in petra.

For tyres choice I feel that Yoko S drives are a better bet if you want performance, ride quality and tyre life. Michillin's, in my opinion are overpriced.

cheers.
GD

Last edited by greatDrive : 4th November 2007 at 09:24.
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Old 4th November 2007, 12:56   #8
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Quote:
to add to the query on 205/50r15 for the nhc,a lot of members with ohc's are running 205/50r15 like manveet,ford rocam.
a fellow member mike3d is running 205/55R15.gto is running on 205/xxR16's!
cant the nhc take 205/50R15's without the rear wheel wells scraping?
Even i would like to know this.....planning to get new tyres/alloys for my NHC.
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Old 4th November 2007, 13:15   #9
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Rocam's car does have 205/50 R15 but then he also has stiffened suspension on his car so it does not foul with the fenders, also his is an OHC. I think you should ask Manveet since he's been running that size with stock suspension on his car.
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