[v1p3r]

Depends, right? I mean, you could instead go for tyres with a larger OD, which I think would suit the skirted look. Spacers would mean higher CG. Not too much fun in corners, that.

[bhp]

i recently got an baleno and i have got an type upgrade at the time of delivery from the dealer itself . i opted for 185/70/r13 Bridgestone potenza G III . can somebody help me with the speedo error that i would face in this case ..

[Samurai]

Originally Posted by bhp

i recently got an baleno and i have got an type upgrade at the time of delivery from the dealer itself . i opted for 185/70/r13 Bridgestone potenza G III . can somebody help me with the speedo error that i would face in this case ..

Very little, about -0.84% or in other words when your speedo reads 70mph, you're actually travelling at 69.41 mph. Also you GC is reduced by 2.5mm resulting in a total GC of 167.5mm.

[speedfreak7116]

I am going for 15" alloys with 195/55/R15 tyres and then getting skirtings so will the ground clearance reduce considerably? If it does then i will have to go for spacers....no other option..

[Samurai]

Originally Posted by speedfreak7116

I am going for 15" alloys with 195/55/R15 tyres and then getting skirtings so will the ground clearance reduce considerably? If it does then i will have to go for spacers....no other option..

Actually I had considered this size seriously until I backed off fearing the affect on ride comfort.

This upsize has the least affect on GC or Speedo error. However, your stock suspension may not be able to take it.

It will increase your GC by 0.65mm and has a speedo error of 0.22% only.

[ritik123]

Originally Posted by speedfreak7116

I am going for 15" alloys with 195/55/R15 tyres and then getting skirtings so will the ground clearance reduce considerably? If it does then i will have to go for spacers....no other option..

Ur GC will fall by about an inch (25.4 mm). Though it may not seem much on paper in reality it will be a big hit.

Also ride quality will go to hell in bangalore roads.

There wont be any speedo error or other related issues.

[ritik123]

Originally Posted by Samurai

Actually I had considered this size seriously until I backed off fearing the affect on ride comfort.

This upsize has the least affect on GC or Speedo error. However, your stock suspension may not be able to take it.

It will increase your GC by 0.65mm and has a speedo error of 0.22% only.

Samurai,

GC will decrease with this upsize.

[Buffetfan]

Samurai is correct...GC will increase by 0.65 mm. Current Sidewall height =165*.8=132mm
New Sidewall Height = 195*.55+25.4 (2 inch in dia=one inch increase in Rim Radius) =132.65 mm

[ritik123]

Originally Posted by Buffetfan

Samurai is correct...GC will increase by 0.65 mm. Current Sidewall height =165*.8=132mm
New Sidewall Height = 195*.55+25.4 (2 inch in dia=one inch increase in Rim Radius) =132.65 mm

Respected sir,

GC is only determined by tyre sidewall height. It has nothing to do with the rim radius. (assuming overall diameter of the tyre and rim combination stays constant, which is the case here)

I maintain what I said.

Lemme know if its still not clear.

[Samurai]

Originally Posted by ritik123

Samurai,

GC will decrease with this upsize.

Please explain your calculation. Mine was explained by buffetfan, thanks by the way.

[Samurai]

Originally Posted by ritik123

I maintain what I said.

Lemme know if its still not clear.

No offense meant, but get ready to eat humble pie soon...

Sidewall Height = Tyre width * aspect ratio
Tyre Diameter = Wheel Height + (Sidewall height * 2)
Rolling radius = Tyre Diameter/2

Diff in GC = difference in old and new Rolling Radius.

[Buffetfan]

Originally Posted by ritik123

Respected sir,

GC is only determined by tyre sidewall height. It has nothing to do with the rim radius. (assuming overall diameter of the tyre and rim combination stays constant, which is the case here)

I maintain what I said.

Lemme know if its still not clear.

Ok..maybe I was not clear.... and used a shortcut method.(Calculations based on sidewall height beyound the first 13 inches..leave it if you dont get it... ;-)....)...to explain in detail..

current Radius = 13/2*25.4+165*0.8 = 297.1 mm (13 inch rim dia, 25.4 mm = one inch, 13/2*25.4 = Rim Radius in mm, 80% of 165 = additional sidewall height aove rim)
New Radius = 15/2*25.4+ 195*.55 = 297.75 mm (same logic...rim size 15 and tyre sidewall 55% of 195 )

Difference = 297.75-297.1 = 0.65 mm

[zaphod]

GC is only determined by tyre sidewall height. It has nothing to do with the rim radius. (assuming overall diameter of the tyre and rim combination stays constant, which is the case here)

the difference in GC would be determined by the difference in final radius of the wheel+tyre - the rolling radius - as Samurai said.


anyway, forget GC, how to lower the Cg :-) damned Lxi seats dont have height adjustment.
so 90 Kgs of me doesnt have a chance to help the handling ;-)

off topic but would putting 'rubber boots' on the struts (or whatever on whereever - I'm no mech genius) stiffen up the ride a bit - increase GC but help stiffen it up ?

I'm looking for ways to improve handling without voiding my warranty (which i actually might have done by going over Maruti's recommendations - i think they do not go beyond a 185/60R14 - any more and the warranty on your suspension is void - I have 195/60 R14's on 5.5" wheels ? can anyone confirm this ? )

A strut brace ? would that be a good idea ? and get a stock replacement K&N fitted as well for the whatever marginal increase in performance it'll offer. No exhausts unfortunately.


zaphod

[Samurai]

Originally Posted by zaphod

i think they do not go beyond a 185/60R14 - any more and the warranty on your suspension is void - I have 195/60 R14's on 5.5" wheels ? can anyone confirm this ? )

Bimal Dealership offered to put 195/60R14 on my brand new car, therefore I don't think there is a issue. However, he did say they don't put 15 inchers on the Baleno. That would void the warranty I guess.

Originally Posted by zaphod

A strut brace ? would that be a good idea ?

I was all for strut brace until I found iceman's super baleno didn't have one.

[iceman91]

for you zaphod, i think you just need to stiffen the struts a bit or put in stiffer springs it helps a lot