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Speedline 2118s, Unsprung Weight & Alternatives



JimF

ClioSport Club Member
  Clio 172
Now, Speedline 2118s are by far the best looking wheel for the Clio, in my humble opinion, but I've noticed they're pretty heavy.
Lets ignore tyres for a second...

OZ F1: 9kg
Speedline 2118: 9.6kg
Team Dynamic Pro Race 1.2: 6.2kg
Enkei RPF1: 4.5kg

Obviously the Enkeis are significantly lighter by a decent margin, they should be for the price. But the relatively bargain basement Pro Races are 1/3 lighter than the Speedlines...
(I am going somewhere with this)
Unsprung mass is a critical area of importance with regards to handling and performance. Every 1kg of unsprung mass is equivalent to higher amount of sprung mass. Lower rotational mass will aid performance. What I'm saying is that an extra 12kg of weight from bad wheel choice would actually feel like more when driving the car.

What I'm wondering is has anyone noticed the difference in weight when actually driving with 2118s fitted? Has anyone swapped from 2118s to something else for whatever reason and noticed an improvement? On previous cars I've gone from significantly larger/heavier aftermarket wheels back to OEM wheels to sell a car and noticed a marked improvment in performance and feel.
Am I just getting worked up over nothing? My Clio isnt a daily, but it isnt an out and out track beast either.
 
JimF said:
On previous cars I've gone from significantly larger/heavier aftermarket wheels back to OEM wheels to sell a car and noticed a marked improvment in performance and feel.
You'll notice a bigger difference from the size of the wheel/tyre than two identically shaped wheels in different weights.

The tyre usually weighs just as much if not more than your average rim anyway, so when you start throwing weight saving numbers around, they're not as effective as you'd first imagine. Especially once the wheel starts spinning, the further away from the centre you get with a spinning mass, the greater the force.

At the end of the day, unless you're a race car driver then it's not worth worrying about. And even then it's probably not worth worrying about as you'd soon get bored of buying new Enkeis when a TD1.2 does pretty much the same job for half the cost.
 
  330i. E30 Touring.
If it's not a racecar then don't worry. You'll do VERY well to notice the difference.
 

JimF

ClioSport Club Member
  Clio 172
You'll notice a bigger difference from the size of the wheel/tyre than two identically shaped wheels in different weights.

The tyre usually weighs just as much if not more than your average rim anyway, so when you start throwing weight saving numbers around, they're not as effective as you'd first imagine. Especially once the wheel starts spinning, the further away from the centre you get with a spinning mass, the greater the force.

At the end of the day, unless you're a race car driver then it's not worth worrying about. And even then it's probably not worth worrying about as you'd soon get bored of buying new Enkeis when a TD1.2 does pretty much the same job for half the cost.
Great info thanks. Although the numbers arent as effective, its a given that I would putting the same tyres on all the rims, then the tyre weight can be ignored, Im not talking about absolute weights, more about weight saving on an important area. A 4.5kg wheel with a 10kg tyre on it is still lighter than a 9kg wheel with a 10kg tyre on it.

I'm less concerned about absolute weight reduction, such as taking carpets etc out, and more with making sure I get the best advantages from the wheels I get, be that increased acceleration, better suspension respsonse etc.


Get the 2118's, enjoy how it looks and keep on driving it.

That's all that matters.
Thats one way of looking at it. But if by buying wheels that weigh 9kg my car wouldn't drive as good as it would if I had wheels weighing 4.5kg, then that was a stupid purchase.
 

bozothenutter

ClioSport Club Member
My Oz allegrittas came with a label stating they were 6.3Kg each

7x16 et37

Basically the wheel acts lije a flywheel, so lightwr should be better, also the gyroscopic forces on a spinning wheel would make it easier to change the direction of the wheel (a larger force would be needed on the heavier wheel)
 
  Turbo 182 Alfa 159
I noticed absolutely zero difference going from 16" 182 wheels to 15" 2118s or 15" OZ F1s. It certainly felt like it drove better on 15s so that was good enough for me.
 
  Cio 172 Cup,Porsche
Lighter wheels equates to less inertia so marginally improved accelaration,and braking as well as less unsprung weight.
 
  Mk2 Clio cup racer
Not really worth shelling out loads of cash to change but if you are buying new wheels go for the lightest you can afford, and by that I mean comfortably so if you nail and wheel on a pot hole you could afford to just ring up and buy another straight away.

Personally I can tell the difference, on my rally car between my standard gravel spec 2118's and the much lighter cup racer spec 2118's, directional change is more resistant with the heaver wheels but it seems to make the car slightly less nervous. As such I use the gravel spec wheels for wets and the cup racer for dry tarmac.

It might not make a huge difference on its own but the devil is in the detail, light wheels coupled with other fine tuning could make a considerable difference.
 

JimF

ClioSport Club Member
  Clio 172
Thanks, great advice. Going to look into this! May have missed a set of Enkei RPF1s (bloody credit card bills!). They would have been perfect.
 
  330i. E30 Touring.
I would look into ease of replacement more than weight TBH. And on that basis, F1's and 2118's FTW.
 

alistairolsen

ClioSport Club Member
regardless of the magnitude of the difference, I couldnt bring myself to spend severl hundred on a set of wheels which made the car worse, purely for the sake of aesthetics. If that was my concern, I'd fit cup turinis in 16s and be done with it.

For that reason, since dropping to 15s is a performance decision, I'd be doing as @mikekean suggests and for me, that's TD Pro Race territory.
 
  Mk2 Clio cup racer
RPF1's are a really nice wheel, had a set on my EP3 but they offer really crap brake clearance. Great if you want to run stock brakes but very limiting for decent sized BBK.
 

JimF

ClioSport Club Member
  Clio 172
regardless of the magnitude of the difference, I couldnt bring myself to spend severl hundred on a set of wheels which made the car worse, purely for the sake of aesthetics. If that was my concern, I'd fit cup turinis in 16s and be done with it.

For that reason, since dropping to 15s is a performance decision, I'd be doing as @mikekean suggests and for me, that's TD Pro Race territory.
Yeah thats what I'm thinking. I had the other mentality on my BMW, but with the Clio its different.

RPF1's are a really nice wheel, had a set on my EP3 but they offer really crap brake clearance. Great if you want to run stock brakes but very limiting for decent sized BBK.
Thanks good to know! I always imagine lightweight motorsport wheels having tons of clearance.
 
  RS RIP
My Oz allegrittas came with a label stating they were 6.3Kg each

7x16 et37

Basically the wheel acts lije a flywheel, so lightwr should be better, also the gyroscopic forces on a spinning wheel would make it easier to change the direction of the wheel (a larger force would be needed on the heavier wheel)
^^ second that.
I just this week switched back to 16" Turinis , coming from 15" magnesium Speedline 2020's.. Very very noticeable change, car feels heavier around the corners, needs more force to turn in, feels lees nimble in general.
 

Coops Mk1

ClioSport Club Member
  RB 182/Mk1 F7P+F4R
I can't notice anything really under road conditions between say a 15" turbine with heavy ns2 tyres and a 15" Williams wheel with lighter Michelins.
On track I could say I can notice between the ns2 shod turbines and the track wheels (15" 4.9kg Oz superleggera with reduculously light Dunlop slicks) but tbh the grip difference in the tyres is the biggest step change so that sort of overwhelms any weight benefits ime.

Basically as all above state, unless your competitive racing, it's a nothing of nothing

Oh and 2118 look awful ;-)
 

BoostedSi

ClioSport Club Member
  172-Alpina D3-ZT V8
I went from cup turinis to cup racer 2118's and noticed a bit of a difference. I also weighed them without before putting them on and they were 7.2kgs. The car does handle a lot better on 15" wheels imho and they just look "right" on a Clio.
 

Sonic Boom

ClioSport Club Member
  Clio 172 Sport Ph1
I just happened to have 4 x OZ F1's stripped ready for powder coating so weighed one as I thought 9kg sounded a bit heavy.
I got them at 7.5kg and that's on a nice set of Slater Scales which I know to be very accurate.

B4857883-FB8E-4215-AD42-F770CC702EFD_zpsmjqmpmhd.jpg


68883A10-4248-45C6-9A1A-F588A7F19F42_zpsswvifev2.jpg


Rich
 
  RS RIP
Sounds heavy for the 2118's too really! Don't think they're that much?
these 2118's can handle all abuse you can throw at them. Heavy as hell, incredibly strong though
The Cup racer 2020's are like 5,7kg (magnesium). Exact same wheel/look , total different drive
 

Coops Mk1

ClioSport Club Member
  RB 182/Mk1 F7P+F4R
yeah tyres can be easily as heavy as the wheel, usually heavier
my slicks weigh 6.3kg each and the wheel they are on are 4.9kg and the slicks are pretty light tyres
R888's, NS2-R's etc weigh a fair amount too
 
I know it's an old thread but I'm confused..
Few questions..
Both wheels are speedline 2118, the silver is et 43 and white et 38.
White has letter on the inside, the silver doesent. Why is there a centre cap prep. On white one?
And the biggest question, why is such a huge difference in weight?
White 8.9 kg
Silver 7.5 kg

The last picture is what's beneath the paint on silver ones..
 

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