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Racebred Universal Front Tire Spat Install

i3igpete

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Install time: about an hour including two trips to the hardware store because I can't count. If you can count, 30 minutes.

https://racebredcomponents.com/products/racebred-components-universal-front-tire-spats

1736699766329-8g.jpg


Materials:
Aluminum spacer 3/4" OD x 5/16" ID, in the following lengths
2x 1" length
4x 3/4" length

https://www.amazon.com/dp/B0841W5LGT?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1

1736700054702-i8.jpg

(you can also find them on ebay, but those links go dead quicker)

6x #12 x 2" stainless sheet metal screws (you technically can go a bit shorter with 1 1/2" length, I just didn't trust I would get full engagement)
6x 1/4" ID x 1" OD fender washers

IMG_20250111_170236.jpg


I traced out the spats onto a large sheet of paper and cut it out. The flat side is the outside, the inside has a curve because most bumpers curve inward at the bottom. These are the locations of the screws when I pressed the paper against the fender liner screws, when the outer edge is normal to the ground.

IMG_20250111_170650.jpg


From here, since both sides are mirrors of each other, lay the template on top of the spats and drill them. A #12 screw technically has a 1/4" hole, but I used a larger 3/8" drill bit. The fender washer and spacer have a large area, so this gives us a bit of wiggle without worrying about clamp load.


IMG_20250111_160959.jpg


From here, remove the 3 forward fender liner screws, and install the spats in using the following stackup and spacer arrangement:

IMG_20250111_161446.jpg
IMG_20250111_155439.jpg


Installed pictures. I pulled the spats as far outwards as possible to get a bit more tire blockage. I installed it with textured side facing forward, but it doesn't really matter.

IMG_20250111_161858~2.jpg
IMG_20250111_161907.jpg


In general, the only recommendation I would have for racebred is to make the entire thing a bit wider, so I can build a bit of a vertical fence all the way up. As it is now, the top hole is already offset a bit. If the hole was drilled even more offset, I wouldn't get full coverage with the washer.

update, this is what it looks like after chopping off the top 6 inches and only using the two bottom bolts.
IMG_20250208_152740.webp


IMG_20250208_152729.webp
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garudathree

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The top most spacer will need to be checked under heavy compression with some steering angle, even more so if running an aggressive tire setup. The lower 2 should be okay
IMG_0821.jpeg
 
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i3igpete

i3igpete

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The top most spacer will need to be checked under heavy compression
agree, in an ideal world i would just omit the top one and make the whole thing shorter and wider, since it's not doing anything. will trim it in the morning, thanks for the heads up. didn't realize the tires would eat into the factory liner that far forward (i know directly above gets chewed up).
 
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i3igpete

i3igpete

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I’m sorry. This is a joke, right?
unfortunately not. the team that built the prototypes said they went through something like ~8 iterations before arriving at the triple teardrop design.

rectangular shapes, kidney shape, with and without endplates, uniform vs profiled thickness, everything kept generating a ton of drag due to interaction of fake vent divot and wheel rotation. the tapered airfoil design was the least-bad option.

Final numbers have not been released, but here is the CFD snapshot for this iteration

Messenger_creation_939861B1-2C99-4563-853B-6F2653C13455.jpeg
 
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i3igpete

i3igpete

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If anybody wants these, you can have them for free - Just pay shipping. DM if interested

IMG_20250404_175605.jpg
 

Kenn

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