M-Part Primoplastic mudguards review

M-Part's Primoplastic mudguards are durable and benefit from robust polycarbonate construction.

They have wide-gauge stays and even include a classic round rear reflector to up your visibility when riding at night.

There are options for a wide range of bikes and the build quality is robust and rattle-free.

Their profile is classically rounded, and only trimmed to fit between the chainstays, so check your frame’s available width before choosing a size.

M-Part Primoplastic mudguards specification and features

M-Part offers the Primoplastic mudguards in five widths: 38, 46, 50, 60 and these 68mm examples. They’re made from a tough, glossy polycarbonate, and come in different colours, with stays in either silver stainless steel, or black coated stainless steel.

A pair of fixed steel bridges on each mudguard accept the black V-shaped stays, which attach with eyebolts through the wings of the bridge.

All of the stays have what M-Part calls Pop Off safety couplings, which do the same job as the SKS Secu-Clip front mudguard fittings, namely enabling the mudguard to detach from the frame should something get stuck between it and the tyre.

Their stepped mounting bracket incorporates a steel plate and a flat mounting surface, which fits most relevant places on a modern frame and fork quite well.

The front of the rear mudguard has an attached clip that loops around most chainstay bridges, and incorporates a small post to insert within the frame’s bolt hole. If needed, the clip-on seatstay bridge fixing bracket is made of very flexible, durable plastic.

M-Part Primoplastic mudguards performance

There’s good coverage from the Primoplastic mudguards at both ends, with the rear covering just over half of a 700c wheel. With their 68mm width, the M-Part mudguards easily covered the 45mm tyres on a gravel bike, and 50mm tyres weren’t a problem either.

The stainless steel stays are 3.2mm in diameter, and provide great lateral stability to the large mudguards once fixed in place with the eyebolts to the fixed steel bridge.

Both mudguards have flexible flaps fitted, which are stepped away from the tyre as they flare out, to intercept more spray. The rear also has a round reflector included for added visibility in low light.

Basically, these mudguards should cope easily with the widest gravel bike tyres, and whether used for cycling to work or wider exploring, they’ll provide great service keeping spray at bay.

M-Part Primoplastic mudguards bottom line

The range of available sizes means there’s an M-Part Primoplastic mudguard to fit most bikes, with the extra-wide 68mm option tested great for gravel bikes with wide tyres.

They provide coverage that's up there with the best mudguards, and have wide end-flaps and plenty of safety features.