[MZ3Carbon]

I recently bought a pedestal-like spoiler off AliExpress and I don't want to drill holes in my trunk for it.
I went to my local O'Reilly for some 3M tape and the cashier (who claims he was an ex-mechanic) said 3M is tape alone without bolting it down is not enough.
His reasoning is that down force will eventually loosen the 3M tape and the spoiler will fly off if that's the risk I'm willing to take.
I know 3M tape is enough for ducktail spoilers but I don't know about the one I bought.
The max speed I drive is around 90 MPH so does downforce really matter?
Is he correct about my spoiler needing to be bolted or is he just using scare tactics?

This is the type of spoiler I bought

 

[JoeMini]

I have 3M on my ducktail and tested it to 170 kph.
The duck tail has much more contact surface than your spoiler.

With your spoiler i would drill holes and also use 3m to seal water away from the drill holes.
Worried the drill holes will rust.... Spray something like this Rust Protection & Lubricants
before you install in the drill holes and bolts

 

[MazdaGT_E]

eventually loosen the 3M tape and the spoiler will fly off if that's the risk I'm willing to take.
The max speed I drive is around 90 MPH so does downforce really matter?
I know 3M tape is enough for ducktail spoilers but I don't know about the one I bought.

just a little fun Aero fact, the dodge viper ACR rear wing @80mph generates over 1000lbs of down force. I know your wing and the ACR wing are drastically different but still something to think about with highway speeds and Aero accessories and the forces they generate.

Put your hand out the window like a plane wing @ 90mph and see if you think thats enough force to rip a wing off thats taped on. Start with your hand at a downward slope then turn your hand until its level and watch how fast the wind rips your arm up.
I'm willing to bet that a wing just taped on wouldn't last one trip at 90mph.

I would NEVER trust just 3m Tape to hold down a wing, Maybe a little wing extension but not a full wing like the one you bought. plus its easy to steal or vandalize when its just held on by tape.

Just my opinion.

Why dont you want to drill the holes to install the wing?

 

[arathol]

No need to make a second thread on this....

 

[MZ3Carbon]

@arathol
Sorry, figured I started the thread in the wrong section so I started another one in discussion.

@MazdaGT_E
I'm lowkey scared of the holes rusting so I'm resorting drilling as last resort (also I've never drilled into my car before)
If I were to drill holes to install the wing, would it look something like this?

Also, the holes that the manufacture gave looks janky. Do you think the bolt will bite onto it?

 

[Dar_T]

Those holes look more like manuf marks than actual mounting holes. You can use rivnuts or some sort of threaded nut insert.

 

[MZ3Carbon]

Ok, noted.
Is there a specific size of rivet nut that I should use?

Sorry if I'm asking stupid questions, I've never done this before 😓

 

[MazdaGT_E]

Ok, noted.
Is there a specific size of rivet nut that I should use?

Sorry if I'm asking stupid questions, I've never done this before 😓

I would go with M6 Riv-nuts and bolts, those are a pretty good bolt and size, if you need to add them to the wing. Try threading a bolt in thats the right size ad see what happens, if it threads and feels tight then you're probably good. if not add riv-nuts.
drilling into your car can be unnerving but there are plenty of youtube videos to help guide you. as far as rust goes you can tape off the areas around where you drill and spray a little bit of rust preventing primer on it. and as mentioned above use the tape to seal off the holes after.

 

[nexbox2016]

It's always a good idea to be cautious when it comes to modifications to your vehicle, especially when it comes to safety. While 3M tape can be a viable option for attaching certain types of spoilers, it's important to consider the weight and design of the spoiler you have purchased.
If the spoiler you bought is large and heavy, it may require additional support beyond just tape to ensure that it stays securely attached to your car. While driving at higher speeds, downforce can put a lot of stress on the spoiler and the adhesive, which could potentially cause it to detach from the trunk.