mark kibort

Here is a better picture of what i do for the 928 when it needs to fit a pretty large rear tire in the back to fit the wheel well. not only do we fit the 275x40x17 on the rear, but we fit the stock 17mm spacer there too.
the fronts are 235.

the ride height is pretty low here, but not crazy low. alignment is stock settings

the lines of the 928 are not disturbed only enhanced and the lips on the fender, front and rear are bent inward. this can not be done by a rolling machine, but by a wooden baseball bat.. preferably spalding.

jetson8859

That's nice looking, have seen many duck bills that make me wonder what the heck they were doing? I'm running 285-35/18 on 10 inch Turbo Twists. They tuck under very nicely with no rolling involved.

Mongo

Wow! If I ever get wider wheels, I am taking a trip to see you in Saratoga.

jerybak

+1

mark kibort

Love to help...

yes, the duck bills just say... "please take me to a body shop soon! "
there is a lot of room back there, depending on the offset of the rims. yes, i remember how the 996 10" rims fit back on our old 79 DE car. but we did some rolling too, as they were 305s.

Ill have to make a video next time on how its done. basically, you jack the car up to start and roll the lip in. then you get to the point where you use the bat as the roller and keep it vertical as possible and roll the car back and forth with the car in 1st and then reverse. it automatically takes the function and creates form. you can go as wild as you want , but when you start looking at 305 tires with spacers, you need to go extreme... that's when its body shop time, but you can do most of the work before hand and then they can clean it up and spray it. otherwise, if you go mild, it pulls the fender out about 1" and gives a lot of room for a lot of much larger tires and rims And looks like it came that way from the factory when you are done.

FredR

Mark,

Both my late S4 and current GTS were rolled with the "official kit" for doing this. Neither of these cars has/had the lip stuck out- it is rolled inwards and upwards out of the way. Whether it came from the factory like that not sure.

The rolling machine is non too sophisticated, mounts to the wheel hub and depends upon the gorilla operating it as to how much force is used as the thing is rolled backwards and forwards. It is a kind of brutally scary process when one sees this done for the first time and when you see the fenders flexing back and forth you feel sure the paint is going to be history yet never saw it crack the stuff once.

The front fender seems to be much more pliant than the rear one that seemed to be much more rigid and de-facto more resistant to being permanently deformed.

With a baseball bat you are doing pretty much the same thing but with less inherent control of what is going on and if it works for you excellent- well done- but maybe you have a talent for such that most would not.

I guess it is a bit like painting coach lines- the top professionals do this by hand- most of us would make a complete mess of it using that method and need masking tape.

Rgds

Fred

dr bob

IIRC, The Owner's Club has a rolling machine available for this as part of their tool-loan program. One of the many benefits available from membership. The machine does the job much more, um, accurately and repeatably than the baseball bat method.

jeff spahn

I used the 928 OC machine until I had the fenders widened by a body shop. Did a good job. Look like this now that I had a shop do it.

entropy_engineering

I've had a few people say it's impossible, but I have 315/30 18 Falken RT615k's on the back of my old body car with no fender rolling. They haven't rubbed yet (knock on wood). Maybe I will baseball bat mine for extra insurance. BTW, I always warm the lip area with a heat gun first to help avoid cracking the paint.

James Bailey

Yes the heat gun is a good idea...and yes it IS easy to mess it up !!

GlenL

This is a mistake following a mistake. How much more tire does it get you? 10mm? It's just not worth messing up the car. Get the right wheels and the right tires. Rolling the fender means it was done wrong and the car got hacked up to make it work.

IMHO!

mark kibort

Ill post the video and its pretty hard to mess up if you dont get greedy.. you get more like 25 to 30mm actually.. 10mm is the lip alone

The pictures i posted are 275s with near 20mm spacers. Before the spacers, it was almost right on the outside edge of the tire.... so, we moved it out the width of the spacer.... after we already moved it out to fit the 275s.... there is about 1.5 " of total room made by doing it to the limit. an easy roll buys you more like 20mm.

rolling the fender gives more room on the inside and gets the tire outward to make it handle and look better. it doesnt mean its a hack, its an improvement.

mark kibort

The huge problem with the rolling machine, is that it doesn't follow the actual dynamic movement of the tire. the bat actually pushes out the fender exactly where it needs to be pushed out. you don't just stick the bat in there... its done in stages... 1st, remove the lip... jack the car up to do that.
2nd drop it down and use the bat handle, and then go toward the larger end as you get more progress. yes, its a little bit of a art, but not that anyone cant learn..... the front is really only about the lip, though you get a tiny bit of movement if careful. its a different material, and brittle so you have to be careful.
my way allows for the fender move out process to yield a flat bowed out surface that is even over the tire and comes back to original at the ends. the roller gives uneven space over the tire which looks funny in my opinion.
if we do another one, ill video tape and post.

bran3b

I used the same process with a wooden bat on a classic Mustang. I haven't tried it on a 928 yet but I will. I was very happy with the control that the bat gave me

mark kibort

until folks see it done , its hard to understand, but it a great example of function following form.