stuartph

OJ

Have you looked at CCW wheels

On the front hub the bearing cup sticks out, with my ET50's and 65's the cap has to have its shoulder cut down so it doesnt stick out as far, but dont cut to much as it will rub on the bearing parts

OJ GTS

I have now... Hmmm, the styles nearly as good and the wheels will cost just over half as much with the exact spec I need. That's pretty tempting!

Good find

stuartph

OJ

I did a thread on them last year

They are on a long list of parts i'll be after this year

OJ GTS

Just had a look at the thread, fire me a pm/e-mail if you think they might do a deal for a double order!

FredR

OJ,

I am talking about the push-in cover that encapsulates the front wheel bearing housing. If you do not know the answer to this point then you certainly need to as you do with respect to clearance over the brake caliper. I repeat- do not assume the wheel supplier knows the 928 geometry- it is different. The only things in common with other Porsches is the 5x130 stud configuration and the centre trims. The wheels I have were originally intended for a 911 and configured for a 928 but do not fit a 928 correctly. I could machine the inner hub of the wheel but even so, the centre cap would still not fit because of the restricted height.

If you look at the front stock wheel you will see that it is a very close fit to the caliper. The 928 geometry requires the front wheel to be pushed in to the wheel arch which is why other Porsche front wheels do not fit the 928 correctly.

Also, you might be able to fit a 255 on an 8.5 inch section but with that offset I would be surpised if you did not have interference problems with the inside of the front wing.

I am not suprised about the condition of London roads but I am surprised that the stock wheels could not handle it. For sure, if they have problems then modular wheels will have more problems- but they can be fixed. When you select a wheel type try to ensure that they are made from 6061[?] series ally rather than 5000 series which is weaker. Also check the rim thickness to ensure they are more road oriented rather than the thinner track type rims which buckle very easily. I think the track type are about 4.5mm thick whereas the street type are something like 6mm thick, maybe a bit less. Others can advise you on that.

Regards

Fred R

Rob Edwards

I have two sets of factory Cup1's and one of the rears on each set has had a crack in the inner rim. Greg Brown has seen the same thing on multiple sets. I have had both sets repaired and are fine given the good roads around here, but I'm keeping an eye on them anyway.

OJ GTS

The thing that sways me is the fact that the BBS website specifically lists the sizes of RS-GT for the 928... I know it's not a great thing to rely on, but is it a coincidence that the part numbers are RS927 and RS928H?

Having said that i've just had a look for some images of the front suspension and I see exactly what you mean. I'm reasonably confident that if the wheels would clear the brakes on, say, a 996 then they'll clear the brakes on a GTS, but that hub cover is pretty chunky. I think I need to get at mine and see what the shape is underneath... The other Porsche models seem to just have 3 teeth sticking out whereas the 928 has a great big lump of hub! Thank you negative kingpin offset suspension.

And sorry wasn't being clear, the 255 or 265 would be for the rear, not the front!!

Yep, the inner rims have cracked more than once, albeit all when my father owned the car. The roads really are that bad. We've been given the option of welding them up in the past, but never taken it and always bought new wheels.

And good point with the rim thickness, I know how easily track rims bend, I went through about 10 of the bloody things on the racing car last year, half the time it was like driving a shopping trolley with a wonky castor

Rob Edwards

I'll have to wait till I can take a pic to illustrate, but the front hub dust caps on a GTS (well, at least my '93 GTS) are considerably 'lower profile' than those on all other 928's 1978-1991 (911 341 684 00) , despite PET showing this same part number for all 928's 1978-1995. I learned this the hard way after buying the proper Porsche 9165 tool to remove them. It doesn't work on the GTS 'cause there's no 'divot' to grab into.

Since you have a GTS you may be in luck on this point, or maybe not. Since PET doesn't mention a different #, it's impossible to tell what you've got.

Anyway, I know lots of people just hammer in the dome on the dust cover on earlier cars to make center caps fit, but if you can find 'em, the GTS hub covers might be a more elegant solution.

Pictures at 11.

OJ GTS

I'll have to check that one out, my GTS is a very late model (one of the last 20 RHD) so chances are if there's an upgraded part, it'll be on there

Thanks again!