Does it make any difference, really? Mine came with 235 PS2s from the factory. I've been running 225 since the PS2s and have never had an issue. I'm running NS2-Rs atm and was gonna fit PS4s in a few months but in the original 235 fitment. The reason I ask. Costco have PS4s in stock. 235 are £131 fitted and 225s are £103 fitted. So, 225s or 235s??
Maybe or maybe Not - obviously the 235 is 10mm wider than the 225 so if the tolerance for fitting on the wheel covers that amount of "undersizing" then you should see little issue. If the tolerance is not enough to cover the 10mm then you may have issues with rim sealing. this sizing depends of course on the actual wheel in use. One other thing is that there could be slight effects on the profile of the tyres, as the tyre would have a slightly different profile this could effect the rolling circumference, and thus the speedometer reading. My 225 on standard wheels has it's speedometer error anyway (72MPH is actually 70Mph when checked with two independent GPS systems), so this is not a major issue but could technically become illegal if excessive, as it would also put the odometer mileage out (and put you on the DVLA Naughty Step )
As long it's only the tyre width that is changing (in this case by 10mm) surely it won't throw the speedo out. Profile would though.
The profile is proportionate to the width though not a fixed thing, although it is a small difference to be fair. Not sure what the profile is on the 250 but i guessed at 40 profile on an 18" rim. Fag packet calculations give:- The diameter of the 235 wheel would be 25.40" and on the 225 25.09"
It changes as the tread depth wears on any tyre anyway, as the rolling circumference reduces. 225's will be fine. Renault recommend a range of tyre sizes depending on the conditions. 225 & 235 are both correct for the wheel and even 215 or 245 will fit but are pushing it.
Sweet. Thanks. It's a £120 saving fitting 225 over the 235. £412 for 4x PS4 fully fitted. Costco are doing £50 cash back vouchers on 4x 18" tyres too. As above, ive always had 225 since I replaced the original 235 PS2s and I've never had a problem. I know the wheel is an odd width. Just thought that if Renault fitted 235 at the factory then there may have been a reason for it.
Yeah the difference is very negligible, i was just pointing out that width does affect the profile of the tyre as its related to the width of the tyre not a set value.
That's what I thought. If the car came with 235 then that's your only choice if you want to remain legal and your insurance valid. You probably won't die instantly but a big third party claim would come under scrutiny and may be declined and therefore costly. If that risk is worth the £100 saving then fair enough but the Yokohama Advan 105 in 235 will yield the same saving vs Michelin and the tyre will probably be as good if you didn't notice any difference between wdth.
Speaking of NS-2R. I've just fitted a set on my 250 and they are noisy as hell compared to the previous federals Sent from my iPhone using Tapatalk
Have you got anything to back that up please? I'm not doubting either of you. It's another reason why I started this thread. If I can see something in print etc then it fully justifies it for me, that's all. I do indeed have a cup with 18" cup wheels. If I have to fit 235 then I will, but if Renault say you can fit 225 and I save a few quid in the meantime then that's better.
The 225 section was only fitted to the non-Cup version. Also see NickF's post above, as that is relevant.
Yep. Second that. Grip like shit to a blanket though! Lol. Like, this one....http://www.rsmegane.com/threads/tyre-time.7677/page-2 I see what you mean. 6 and two threes. It's all down to preference and how anal / risk adverse you are I reckon - the latter wrt insurance in particular.
It was just worth clarifying the Renault do not recommend a range of sports road tyre sizes for your Cup.
I run the 180 version of the NS2R. They probably don't grip that much more than a SS or PS4 or Yoki 105. The big difference is they are very stable and once you hit the temperature sweetspot they stay there seemingly forever, as in 10/12 laps (by which time I am tired). The road tyres would have melted by then. The Cup 2s would probably do that too and offer more grip but cost 50% with 2mm less to start with.
In reality your not going to notice it. I ran 225/40/18 pilot super sports on my cup and the world never ended. Renault also recommend 5w40 oil but the way I use my car it's no good. Basically do what suits you. To answer your question I personally wouldn't worry about the difference and save the £120 and spend it on fuel burning your tyres. On a side note the tyre choice will have a bigger affect on the size ie I know federal 595rsr come up almost 10mm wider then they say so a 225 tyre will be as wide as most 235
I really don't think it's about the world ending ;-). I just checked and the Yoki 105 is just over £100 each in 235 and in the correct load. Potentially a tyre with better turn in than the Michelin, what with the stiffer sidewalls...
I just had two of these put on to replace Pilot 3 (turn in felt the same as SS I had previous) and I think the turn in is sharper, I've not tried them on track yet.
the yoki 105 turn in more direct, they also wear alot quicker in my experience, making them more expensive.
Possibly. You can't have it both ways although I doubt they'll wear as quickly as say a Conti 5 or 6. On a performance car, turn in remains a priority for most I would have thought.
I used 225s on the race car and did not make a noticeable difference from 235s if I am honest and just so much cheaper. Sent from my iPhone using Tapatalk
I'vefound the same... Type of tyre has a much bigger difference than size... Some 225's are bigger than some 235's and vice versa..
They hovewer come with 10mm thread depth and potenza re050a also, while the most other is 8mm Sent from my LG-D855 using Tapatalk
