The long-lost bicycle disc brake shields
Why have they suddenly returned in 2025?
The Intense Factory Racing team, in collaboration with J-Tech, has developed a 3D printed disc brake shield designed to protect brake rotors and calipers in rainy or muddy conditions.
Everyone knows that brakes are one of the most critical components of a bicycle, especially for mountain bikes. Therefore, their strong, stable, and predictable performance is crucial. However, performance can be affected in wet and muddy environments: when water splashes, the rotor is immediately cooled, reducing braking force, and when dirt and sand get in, friction is significantly compromised.
Thus, this disc brake shield can protect the rotor, allowing racers to maintain more stable braking performance even in harsh weather. Although this is just a marginal benefit, in races where victory can be decided by mere milliseconds, this could be the key to turning a second-place finish into a championship!
Is it retro or cutting-edge technology?
In fact, disc brake shields are not a new concept. Previously, Cannondale’s Fulcrum model featured a brake shield as part of its distinctive design, making it easily recognizable. However, this design was forgotten until its resurgence in 2025!
“The team’s task for us was simple: keep the rotors and calipers clean,” explained Jim Williams from J-Tech.
“We want riders to go through big puddles or wet and cold trails without frequently using the brakes, only to find that when they need them, the braking performance has declined. This shield is designed to prevent that from happening.”
This shield was custom-made for team rider Joe Breeden, who is full of innovative ideas. Previously, J-Tech had helped him create handlebar end caps that could “save energy” and a custom rear shock lockout device for the Intense M1.
The weight of each shield is approximately 100 grams. While this slightly increases the unsprung weight and affects the responsiveness of the suspension, the team believes that the improved braking performance far outweighs this minor drawback!
Will it affect heat dissipation?
They found that this shield helps keep the rotor at optimal operating temperatures. In wet and muddy conditions, the surrounding temperature is low, and the splashed water further cools the brakes. These shields effectively insulate, maintaining brake temperatures close to those in dry conditions.
J-Tech stated that they will continue testing to find the optimal amount of heat dissipation and see if ventilation holes are truly necessary. “This product is still in its early stages, but the team riders have indicated that keeping the brakes free from water and mud in wet conditions significantly impacts braking performance,” Williams concluded.
▲The front shield is secured to the front fork using the mounting points on the EXT Vaia fork’s legs.
▲The rear brake shield features ventilation openings.
▲The rear brake shield is secured to the frame with zip ties.
Can the disc brake shield reduce air resistance?
Williams stated that the aerodynamic advantages of this shield are definitely a direction to explore in the future. However, at present, its primary function is to provide consistent and strong braking performance in wet/muddy conditions!
This super cool disc brake shield is currently not available for sale.
Additionally, at the recently concluded muddy battlefield of the La Reine DH track, most teams also used disc brake shields, making this accessory a new favorite on the La Reine DH track. This protection device, designed for extreme muddy and rainy conditions, not only maximizes the cleanliness of the rotor surface but also effectively extends the lifespan of the rotor and brake pads.Forordinary riders, with advancements in technology and reductions in cost, disc brake shields may become standard equipment in the future.
Have you used a disc brake shield?
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Source: bikeradar, compiled by Bike Magazine
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