Nitromousse Mousse Soft (6-8 PSI) 120/100-18

The Nitromousse Soft is a foam mousse tube for a 120/100-18 rear tyre, developed by Nuetech as a puncture-proof alternative to a conventional inner tube. It suits enduro, hard enduro and off-road riders who want to stop worrying about flats on rocky, rutted or sharp terrain without accepting the dull, wooden feel that mousses have traditionally been known for.

Rather than a simple foam core, Nitromousse uses a high concentration of nitrogen locked into a tough micro-matrix of proprietary elastomers. The result is a plusher, more pneumatic feel with a low-pressure, progressive character that absorbs impacts and resists deflection, while the durable compound is built to outlast conventional mousses.

This is the Soft version, giving a ride feel comparable to roughly 6-8 PSI. There is no break-in period — it performs consistently from the first ride. Please check the Nitromousse fitment guide before purchasing to confirm it matches your tyre and rim combination.

• Puncture-proof mousse tube — replaces a standard inner tube so you can't be stranded by a flat
• Soft density with a ride feel equivalent to approximately 6-8 PSI
• Sized for 120/100-18 rear tyres (18 inch rim)
• High nitrogen content delivers a plusher, pneumatic feel and eliminates the usual mousse 'dead feel'
• Tough micro-matrix of proprietary elastomers rated to last up to twice as long as other mousses
• Low-pressure, progressive character that resists impacts and improves bump absorption
• Reduced deflection and a lighter feel in motion for more predictable traction
• No break-in period required — consistent performance from the first ride
• Designed and tested to perform consistently across a 30 to 100+ degree temperature range

Check the Nitromousse fitment guide before purchasing and before fitting, to confirm this mousse matches your exact tyre and rim combination.
No break-in period is needed — the mousse delivers its intended feel from the first ride, so there's no bedding-in procedure to follow.
Use a dedicated mousse lubricant during fitting, applied to the mousse and the inside of the tyre, so the mousse can move against the tyre carcass instead of tearing itself apart through friction and heat.
Fit with proper tyre levers and rim protection, and take care not to nick or gouge the mousse during installation — cuts become failure points.
Re-lubricate at tyre changes: whenever the tyre comes off, inspect the mousse and re-apply lubricant before refitting.
Inspect the mousse periodically for shrinkage, hardening, splits or chunking. A mousse that has lost volume or gone hard has reached the end of its service life and should be replaced.
Do not attempt to inflate a mousse or run it alongside an inner tube — it is a solid insert and needs no air.
Store spare mousses in a cool, dry place out of direct sunlight and away from petrol, solvents and oils, which degrade the elastomer.
Expect the mousse to run hotter than a tube on sustained high-speed sections; allow it to cool after hard use rather than parking it under load.