Standard 197 wheel weight? How much can I save?

[oferh]

I think the standard wheels look neat but I'm looking for an alternative. Couldn't find anywhere the weight of the standard ones compared to lightweight alternatives (e.g. ultraleggera).

How big of a difference are we talking about?

 

[Roas]

Standard ones are 10kgish, Ultraleggera should save you ~2 kg of unsprung weight per corner.

 

[ryan197]

Standard ones are 10kgish, Ultraleggera should save you ~2 kg of unsprung weight per corner.

yeh same here, my pro race 1.2s were -2kg

 

[Raptor6767]

yeh same here, my pro race 1.2s were -2kg

Can you post some more details?

AFAIK, stock 197 wheels are 11kg, and the Cup ones are 9kg.

 

[chris hughes]

yeh same here, my pro race 1.2s were -2kg

will reducing unsprung weight by 8kilos have much effect? also would 15's increase acceleration?? iv seen a few 1*2 track cars and fiesta st race cars sticking 15's on...how come?

 

[jase]

Standards are definately 10 without tyres as I wieghed mine.
Anything less than 17" wheels won't fit over the front brakes...(although the R3 runs 16" wheels, not sure how.!)

 

[Roas]

Unless you fit smaller brakes, 17´s is what you need (for most rim designs). Removal of 8 kg unsprung weight is by rule of thumb like 40kg of sprung weight.

In gear performance, fuel economy, suspension, everything benefits from it. You will surely notice the difference!

PS: 2-piece brake discs is the next step

 

[Raptor6767]

will reducing unsprung weight by 8kilos have much effect? also would 15's increase acceleration?? iv seen a few 1*2 track cars and fiesta st race cars sticking 15's on...how come?

Yes, reducing unsprung weight would have an effect on handling & acceleration.

15" would also have a negative effect on handling and a positive effect on acceleration - especially on the rolling starts because from 0 it would be more difficult to start without spinning the wheels more than before.

Oh, and BTW - you can't fit any wheel <17" on the 197.

 

[Paul]

Putting smaller wheels on reduces the rolling resistance and has the effect of increasing torque - basically it takes less effort for the engine to turn the wheels which should give a bit of help accelerating, but as you say you see it done on fiestas etc as it has a lot more effect on less powerful cars.

 

[kevo66 (weaveworx)]

Yes, reducing unsprung weight would have an effect on handling & acceleration.

15" would also have a negative effect on handling and a positive effect on acceleration - especially on the rolling starts because from 0 it would be more difficult to start without spinning the wheels more than before.

Oh, and BTW - you can't fit any wheel <17" on the 197.

^^^ what he says!

But you can get a 16 to fit

 

[Raptor6767]

But you can get a 16 to fit

You can? Didn't know that...what's with the calipers?

 

[Roas]

Surely depends on the design of the wheel.

 

[kevo66 (weaveworx)]

You can? Didn't know that...what's with the calipers?

STD calipers, R3 gravel stage wheels!

 

[Raptor6767]

STD calipers, R3 gravel stage wheels!

Hmmmh....interesting stuff for drag racing...hmy:

 

[kevo66 (weaveworx)]

Hmmmh....interesting stuff for drag racing...hmy:

Yep... will have to investigate that!

 

[jase]

Very expensive wheels though.
But yep they do run 16". It's all down to the shape of the inner drum and back of the wheel face.

 

[Raptor6767]

Yep... will have to investigate that!

Fronts on 195/45/16, slick tyres - like R888 or Michelin Cup, 1.6 bar....rears also on 16" but on 3.0bar and the narrower they are the better - less roll resistance (don't know how to write it in english - but the less friction the better for the rears). :lol:

 

[kevo66 (weaveworx)]

Very expensive wheels though.
But yep they do run 16". It's all down to the shape of the inner drum and back of the wheel face.

R sport???

 

[jase]

Not sure keV.
The lad who used to be on the site from leicester that raced the R3 came to get a front bumper off me once told me they ran 16" for gravel with standard brakes.

 

[chris hughes]

Yes, reducing unsprung weight would have an effect on handling & acceleration.

15" would also have a negative effect on handling and a positive effect on acceleration - especially on the rolling starts because from 0 it would be more difficult to start without spinning the wheels more than before.

Oh, and BTW - you can't fit any wheel <17" on the 197.

really glad i joined this site...learning more everyday!