235/40/17 front & 295/30/18 rear

Frank

No rubbing anywhere. The headlights are miles away from the wheels with an S1 Frank. I have upped the front width by 60mm or 30% ish and the rear by 70mm or 30% ish so to be fair I am expecting the balance to remain pretty much the same.

Jamie,

Yes I have cut away the front of the sill / wheel arch so that I can get the lock I need. I cant get full lock, but it isnt far off and it is more than enough lock for what I need. I reckon the lock has been reduced by about 8%

The ride height has been a little bit of an issue, but one we have in hand now. The rear is fine as the diameter of a 295 x 30 x 18 is almost identical to the standard 225 x 45 x 17. The diameter of the front wheel is about an inch taller (the wheel is 9 x 18). We are in the process of having some new hubs made that will give me the required suspension geometry. I have tried all of the hubs currently on the market, but non of those have been designed with these sizes of wheel and tyre in mind. The guy designing them is a good buddy of mine, and he certainly knows what he is doing, so fingers crossed they work out nice. We are using S2 bearing packs all round.

Elise 111S

Its a bit of a labour of love and it is happening at quite a slow pace, so I have no idea when it will be done. To be fair I have everything apart from the aforementioned hubs, so maybe wit ha bit more time on my hands, it could be getting there. I’m enjoying messing with my S2 a bit too much at the moment.

Just wait till you get in the rocket pig… :whistle:

Sean you not doing a build thread this time? Is that rear clam photo a recent one or you got some better ones of the kit fitted now? Painted?

I had 235’s on the front of mine with 295’s on the back and the 1 lap I did in the car I thought It was great so I don’t see any problems running those width tyres.

I have got loads of pictures and I will do a build thread. But it is happening at such a slow pace there would be months between updates. I was simply going to collate everything and do a thread as the end gets within site.

The clams aren’t painted yet. We have done a few days work on fitting them and they are getting there, but there is still another few days in them I reckon to get everything right.

I’m looking forward to the rocket pig Frank.

And as far as my tyre sizes go, I’m gonna give them a try, if it works, great, if it doesn’t, then at least we gave it a try and learned something, and we will change the spec and do something else.

Interested to know your thinking behind this? I know the original bearings are troublesome but the motorsport/76mm have a better reputation. If you are making your own hubs then you had the choice of both?

We were changing the wheels and brakes anyway, so it was now or never.

The upsides are quite big to be honest. The motorsport uprights are now really rare - just sold the last new set - the flanges are no more, and they are a press fit, so wear a little each time you press them in and out, no front speed sensors, expensive if you need to change bearing and flange, you need a press to replace them, struggle with slicks - we were changing at least one per event on a customers car - front S1 uprights are �250 ish, S2 standard ones are �80 ish, there was a very loooonnnnng list!

The S2 style bearings are a complete unit, held to the upright by 3 bolts, have speed sensors built into the units, are designed to carry around 1500kg Astras/Vectras, can cope with much more abuse, probably changed less than 20 since they were introduced.

Originally I was going to go 205/45/16 and 255/40/17 for my gt3 builds. Now the clams are all on the car I’m now a bit concerned that with the clam been so wide (does look good though!) that it may look a little odd unless I go for wider rubber.

I don’t want to ruin the handling, so what people’s thoughts on a good combo for handling/looks?

Handling and spacers/offsets

285’s or 295’s on a set of 10’s for the back I reckon.

Yeah, I think pretty much decided on 10" rims on the rear. Just need to decide if I should for for 255 (as per the the concept car) or 295. The latter will probably look better.

[quote=N17VES]Originally I was going to go 205/45/16 and 255/40/17 for my gt3 builds. Now the clams are all on the car I’m now a bit concerned that with the clam been so wide (does look good though!) that it may look a little odd unless I go for wider rubber.

I don’t want to ruin the handling, so what people’s thoughts on a good combo for handling/looks? [/quote]
215/40/16 285/30/18 Handling and looks, you could go 225 in front but it’s not needed since the stock 195 A048 Yokos are not over worked with 285’s on the rear…

You need to try harder Frank!! :wink:

If you want to try a 10" rim with a 295 on it, I have a pair here in S2 PCD that you could borrow.

I’ll ask Chris what he thought again…

If you want to try a 10" rim with a 295 on it, I have a pair here in S2 PCD that you could borrow. [/quote]

Thanks for the offer, but your probably a bit far away from me.

Go 10.5-11.5 in the rear if your body will allow for it.
I built my rear around my 10.5 rims, I could use 335’s on 12’s in the rear now.

The biggest difficulty with over 10 inch rims, is finding people to make them in low volumes. Did a bit of digging on this a month or so ago, and of the big UK players, only Speedline could make them, with a minimum order of 10 sets of 4.

Other than that, you’re into split rims, which can be a little hit or miss, or uber expensive.

[quote=JDS]
Other than that, you’re into split rims, which can be a little hit or miss, or uber expensive. [/quote]

How can , split rims, be ’ hit & miss’???

I had a set of bespoke split rims , made by Black Country company ( name escapes me ) from Billet aluminium for my racing Morgan years ago, very expensive, but brilliantly engineered to the tightest possible tolerances. No hit & miss at all!!!

Contact CCW Wheels they did a set for me and they are spot on… At this point you better have proper offsets…

Know of at least 2 different split rim makers that aren’t the best. Ask Frank, he knows and previously had used one of them in the US, pretty unsuccesfully, and I have heard of one or more over here that do a similar job. There’s more to a rim than being dimensionally correct

There’s a reason that Porsche use BBS rims on the GT3 cars, and its not because they are both German :wink: