Fender mod terms for the new guys

[burgy240]

I thought this might help some people in their builds. Now none of you will probably EVER radius your fenders but the other things could help...Enjoy

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Rolling
When you roll a fender, you are pressing the inner fender lip down in order to make more clearance so your tires don't rub. This is done with a fender rolling tool & heat gun or the ghetto way with a baseball bat (not recomended)
Con: you can chip your paint or buckel the quarter panel if not done carefully.
Difficulty: 2-2.5 out of 5 almost anyone with patience can do it

Video of my buddy rolling his Cima Fenders. Notice how the lip just folds up into the fender but there is no pull on the outside.
http://www.youtube.com/watch?v=ZHuKE4jKenM

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Shaving
When you shave a fender, you are shaving off the inner lip. This is usually done with a grinder
Con: you can split the inner fender from the outer fender if you cut at the wrong spot
Difficulty: 2 out of 5 just watch your face
Shaving with a belt sander (easier and safer, but time consuming)
http://www.youtube.com/watch?v=035C7Eubqwk
The faster but more risky way
http://www.youtube.com/watch?v=_P8wsJFWF1s


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Pulling
When people refer to a pull, they mean you are literally pulling the fender outword past its stock location in order to fit more aggressive wheels. This can be done with a fender roller (only recomended on small pulls) or hammer and dolly (will require bondo and paint after words)
Con: you can mess up your car if you f*ck up. You will need to paint your quarter panels or fenders
Difficulty: 3-4 out of 5 This is best left to a body shop



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Radiusing
This is when you cut the wheel well opening larger. You're making the arc higher in order to get the car lower. Most cars come with the rear arches much lower then the fronts so as a result, the rears tuck when you drop it. Basically, a new arch is cut, the inner fender then has to be moved up higher so you don't rub (thats called tubbing) This should be done at a skilled body shop. Although the actual job is not difficult, most shops dont use the precision and accuracy to cut evenly on both sides and to not cut too high. You dont want to have fender gap with the car laying on the ground. Radiusing should be the final step in the fendering modding process
Con: There is no comming back from this. because your arch's are higher, you will appear to have more fender gap even when driving low. You must be committed to drive slammed all the time or this will make your car look worse.
Difficulty: 4 out of 5 Most body shops will not do it or they will not cut exactly where it needs to be cut

Notice the amount cut up from the original fender line?

Then the additional sheet metal to get a little more room. Of course this is FAR from being finished and cleaned up


Now the car can sit almost a full inch lower without hitting the fender.

[Eight Equals D]

o.O intresting

[Blackzenki82]

vote for sticky!!

[tuner1989]

Sticky Sticky Sticky Sticky

[kkracing]

Thanks good info..

[burgy240]

Wheel Offset Calculator



Backspacing is the distance from the rim's mounting flange surface to the back edge of the inside side of the rim, like if you laid the rim on the ground with the finished side up, and stuck a tape measure to the ground and measure up to the mounting surface.

Offset is just used to find out what the backspacing of a rim is and are shown in millimeters. This is the distance that the mounting surface is offset from the wheel's centerline. But, the centerline, (half the rim's width) isn't 4" on an 8" rim. That's because it is a nominal 8" rim and is really 9" wide. So centerline on an 8" rim is 4.5", and centerline on a 9" rim is 5". So if you have a 9" advertised width rim, with -12mm, (about 1/2"), of offset, the backspacing will be 4.5".

The formula for backspacing is: nominal width plus 1", divided by 2 (to get centerline), then add the offset (positive or negative).
Example: (9" + 1") / 2 + (-12mm) = 4.5"
[Btw, 1" = 25.4mm]

A 4.5" backspacing means that a rim of the same width as one with a 5.5" backspacing, will stick out 1" more. If the rim is also an inch wider, it will stick out 2" more.

[NeedCAforS13]

This should have pictures of each type of fender mod... my .02

[4wheeldriftS13]

^+1

This definitely should be sticky-D

[LongFellow]

I just shaved the fenders on a 00' GS400 and it totally sucked balls, but it now has awesome wheel clearence.

I wouldnt recomend shaving on most cars though, GS/LS lexus have very very think twin layer lips with about 1/16 of bonding agent ontop of that. They're a bit stronger than a standard single layer fender like whats on 240's

[burgy240]

Added a few pics and videos for reference. I will try to find some good pulled pics later, so many of them labeled as pulled were actually rolled not pulled, or flared not pulled.