Big Bore valves said to improve airflow by more than 200 per cent
Muc-Off has used the 2024 Sea Otter Classic in California to launch a new coreless valve, designed to offer ‘insane airflow’ for easy tubeless inflation.
The new Big Bore valves claim to solve two common problems with tubeless valves: restricted airflow and sealant clogging in the valve stem.
The straight-through design creates an unrestricted channel for inflation and a free passage for sealant. Muc-Off says the Big Bore improves airflow by more than 200 per cent, compared to a standard tubeless valve.
The Big Bore features a stainless steel ball valve and lever system to regulate airflow. Rotating the lever to the fully open position when inflating a tyre offers maximum airflow. Muc-Off suggests it can also be used to fine-tune tyre pressure on the go.
The internal bore design also means the core doesn’t need to be removed to add sealant to a tyre, if that’s you’re preferred method of tubeless setup.
Muc-Off will offer two versions of the Big Bore at launch: the Big Bore Lite, for Presta compatibility, and the Big Bore Hybrid, with the same Presta-style stem, but with a wider valve head for use with Schrader pumps.
Later this year, Muc-Off will add the Big Bore Ludicrous, for use with Schrader-sized rim holes.
Pricing for the Big Bore range is to be confirmed.
Finally, Muc-Off also has a new tubeless sealant formulated, according to the Dorset-based brand, specifically for road and gravel riding.
The sealant uses a new water-based synthetic latex solution, designed for use at the higher pressures associated with road tyres, and is said to seal holes up to 7mm.
It will be available in an 80mm pouch or 500ml bottle.
Muc-Off’s existing sealant will be rebranded as a mountain bike-specific option.