You can probably find a thin/flat nut to fit on the inside of the rim to use a grease fitting in the original valve hole. If I went to mousses, I would probably put a blob of silicone on each spoke hole (inside) to keep even more water and grime out. It would be a one time/setup thing. I'm still on the fence, though. I can't decide if I want to go tubeless or mousse. I don't race, but I am not kind to my rims in the rocks and I'm always worried about flats since I like to run 6 psi rear and 7 front.
IMO mousses are the least prone to failure and offer the highest level of assurance out there. I have run tubeless set up as well. Not sure if the tapered threads on the grease fittings would work with a locknut on the inside of the rim?
On our Baja 1000 race wheels we would drill and tap the rear rim in 2 places and install angled grease fittings in those 2 threaded holes with the grease fitting pointing toward the brake side of the wheel. Using a hand held pump type grease gun we would pump KY Jelly into the grease fittings during our longer than normal pit stop around dusk when we were hanging lights, changing air filter, checking oil etc. Providing we did not turn the rear rim into the shape of a stop sign the rear wheel would go the distance from Ensenada to La Paz using a Michelin bib mousse with a Michelin Desert tire wrapped around it with it being lubed once mid race via the zerk fittings. In total the rear rim had 5 holes in it with 4 of them being used, 2 for rim locks, 2 for grease fittings and the one for the valve stem being plugged with silicone seal with a strip of duct tape covering it.
As soon as the tire heats up the centrifugal force would spread it around I'd say. Might feel a bit unbalanced at the start but better than running dry...
you guys are way over thinking this....people been using mousses for 30 years. just do what all the pro teams do, no need to reinvent the wheel. lube the tires lube the m mousse install it and ride it. get out and ride wooo hoooooooo Christmas the birth of el nino hahahaa el nino is here!!! its raining in socal finally
I probably agree with you here! I over think stuff too. The guy I ride with still got normal tubes in his.... I do like that tubeliss and the carefree mousse too. In regards to the weather, still no rain here. 3 years overdue.
just got a ring from one of our ride crew somewhere up there in the El Nino snow zone (I think he's in Mammoth)..he just ran into Roger DeCoster and had a 1/2 hour coffee break with him. The man.