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Effetto Mariposa launches tyre inserts for CX and gravel bikes

Effetto Mariposa will help to keep you rolling on harsher gravel grinding terrain
Effetto Mariposa's mountain bike puncture proofing now applies to gravel bike rim widths too (Image credit: Effetto Mariposa)

Effetto Mariposa has launched a clever new rim accessory to reduce your potential gravel riding frustration.

Despite their road bike design likeness, gravel bikes operate in a harsher environment where the riding surface delivers a great deal more puncture risk.

Although gravel bike-specific tyres are improving, they will always be limited in their pinch flat resistance by size.

With a much smaller casing than even the narrowest mountain bike tyre, gravel bike rubber is more susceptible to rim-induced puncture damage if you speed over a root or rock. And on an adventurous gravel bike ride, you’ll certainly encounter some technical terrain.

To counter the annoyance of a high-speed root-induced pinch flat, Effetto Mariposa now markets gravel and cyclo-cross specific tyre inserts.

A technology proven in extreme downhill mountain bike racing; rim inserts prevent pinch flats, when the tyre is severely compressed against the rim by a trail feature.

Effetto Mariposa has vast experience producing quality tyre inserts for mountain bikes and, its new Tyreinvader 35 series, repurposes all that product development for narrower rims.

Specifically engineered to run on narrow cyclo-cross and gravel bike rims, in the 18-25mm width profile, the Tyreinvader 35 inserts use a cell foam liner construction.

To ensure they work with sealant and tubeless tyres, the Italian brand’s Tyreinvader 35 has special cut-outs and is non-absorptive. It does not require a change in your wheelset's valving either. 

Effetto Mariposa says that its Tyreinvader 35 will work with rubber in the cross-section range of 32-42mm and only add 48g of weight to a wheel.

As gravel bike riders attempt more adventurous routes, the risk of rim strikes and pinch flats increase. Tyres are not going to get bigger, as there is an inherent rolling resistance benefit and clearance issue, which is specific to the appeal and function of a gravel bike.

With inserts, you can be guarded against that dreadful feeling of a deflated tyre, moments after rolling over that unexpected root at speed. The Tyreinvader 35 is set to retail for €50.