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Effetto Mariposa Tyreinvader



Good rim protection from an easy to install and affordable insert
No sealant loss
Easy install
Includes aliens
Design means it can't help with bead retention

At every product is thoroughly tested for as long as it takes to get a proper insight into how well it works. Our reviewers are experienced cyclists that we trust to be objective. While we strive to ensure that opinions expressed are backed up by facts, reviews are by their nature an informed opinion, not a definitive verdict. We don't intentionally try to break anything (except locks) but we do try to look for weak points in any design. The overall score is not just an average of the other scores: it reflects both a product's function and value – with value determined by how a product compares with items of similar spec, quality, and price.

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The Effetto Mariposa Tyreinvader provides great protection to rims from impacts when running low pressures. It's easy to install and doesn't soak up sealant, though there are better options if you're looking for bead retention too.

Tyre inserts are slowly making their way into increasingly narrow tyres, and while the Tyreinvader isn't an option for road tyres – the narrowest version is for 35mm tyres – it is a great way to add some rim impact protection in a gravel, mountain bike or cyclocross setup.

What you're getting in the kit are two long strips of high-density EVA foam. They're long enough for 700c wheels and come with cut lines should you be running 650b wheels. The strips have cutouts along their full lengths to allow sealant to easily pass through, and some are in the shape of the old 70s Space Invaders game. Hence the Tyreinvader name, presumably (and maybe the lack of a space in the name because it's not space invaders, it's tyres... I may be overthinking this).

2021 Effetto Mariposa Tyre Invader 1

Installation is really simple. In fact, compared to other inserts I've installed, these are easy as they sit within the body of the tyre instead of (like Vittoria's Air Liners) down in the rim well. Down there they can make installing the final section of tyre bead very challenging.

I might be teaching you to suck eggs here, but with one side of the tyre on the rim, you can get the Tyreinvader ready by using the included zip ties to secure the two loose ends together. Clip the excess off with some scissors and then put the Invader into the tyre, making sure the gap for the valve is roughly in place – you don't want to disrupt the airflow.

You then simply put the second side of the bead onto the rim and push the sealant through the valve.

With that done I got on with reviewing the ride. The Tyreinvader is wider than the rim, offering coverage for rock strikes. I generally seem able to find a few on each ride and it wasn't long before I hit a good one. With these installed there wasn't that horrible sound on impact - you know the one. It sounds like the wheel has surely broken into many pieces.

For the rest of the time, you don't really know you've got these in. They only weigh 107g for the pair, so it isn't adding much to either wheel.

> Buyer's guide to tubeless tyres – find out all about new technology rubber

Whether the inserts would offer much protection from absolutely massive hits, I'm not sure, but it is nice to feel the rim is at least a little protected from the regular impacts of general gravel riding. Really though, for 99% of the time, I couldn't tell I was riding them.


At £50 this is one of the cheaper ways to protect your rims. The Vittoria Air-Liner Tyre Insert Kit I mentioned is £89.99, though the kit includes an installation tool, valves and sealant. CushCore's Gravel.CX offering is over triple the price at £160, which makes the Tyreinvaders seem like an absolute bargain.

On the other hand, the designs that sit lower also offer some bead retention benefits by physically holding the tyre in place, and you're not getting that here. I'll admit that's only really a consideration when running excessively low pressures during a muddy cyclocross race, though.


These are easy to install, effective once they're in and just get on with the job pretty much invisibly. The price is attractive too.


Good rim protection from an easy to install and affordable insert

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Make and model: Effetto Mariposa Tyreinvader

Size tested: 35

Tell us what the product is for and who it's aimed at. What do the manufacturers say about it? How does that compare to your own feelings about it?

From Effetto Mariposa: "People riding aggressively on rocky terrain would often like to reduce tyre pressure for better traction and control, limited by the worry of 'hitting hard', pinching the tyre casing between the rim and a rock, cutting it and/or damaging the rim. That's where tyre inserts (anti-pinch-flat inserts, tyre noodles, etc.) can be helpful. This product fits inside tubeless tyres and absorb a part of the impact, protecting tyre and rim."

Tell us some more about the technical aspects of the product?

Effetto lists:

Very lightweight (starting at 53g for one 29in wheel) and high durability

Premium material (high-density EVA) absorbs shocks but not sealant

Can be easily adapted to common wheel diameters (26, 27.5, 29in)

No need for specific tubeless valves

Rate the product for quality of construction:
Rate the product for performance:
Rate the product for durability:
Rate the product for weight (if applicable)
Rate the product for value:

Tell us how the product performed overall when used for its designed purpose

They protect the rims from the general hits that seem to happen a few times each ride.

Tell us what you particularly liked about the product

The easy installation is great.

Tell us what you particularly disliked about the product

Other designs offer bead retention benefits if you're running super-low pressures.

How does the price compare to that of similar products in the market, including ones recently tested on

Very well. These are a cheap way to go if you baulk at the cost of CushCore's offering.

Did you enjoy using the product? Yes

Would you consider buying the product? For my gravel bike, yes

Would you recommend the product to a friend? Yes

Use this box to explain your overall score

These easily and cheaply add impact protection to your gravel bike setup. They just work.

Overall rating: 9/10

About the tester

Age: 27  Height: 177cm  Weight: 62kg

I usually ride: Specialized S-Works Tarmac SL7  My best bike is:

I've been riding for: Under 5 years  I ride: Most days  I would class myself as: Expert

I regularly do the following types of riding: road racing, time trialling, cyclo cross, commuting, club rides, general fitness riding, I specialise in the Cafe Ride!

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Secret_squirrel | 1 year ago

Would this really work though?  Whats to stop the foam squirming out of the way in a pinch type hit?

Think I'd like to see a set deliberately riden on semi-flat tyres

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