Presta Valve to Schrader Rim Adapter

thingiverse

I accidentally ordered Schrader rims, but didn’t have Schrader tubeless valves kicking around. I have some excellent 76 Projects Hi Flow tubeless valves, and the top of these valves is big enough to seal against the Schrader-sized 8mm hole in the rim, but on the spoke side there was nothing to keep the ~6mm valve centred. There’s no sealing required at the spoke side since it’s all done at the rim tape, so basically an adapter just has to centre the valve by taking up the space between valve and rim. The design of the 76 Projects valve is a little thicker than others, so this should adapt most tubeless Presta valves to most Shrader rims. You do need to double check that your Presta valve is capable of sealing against the rim at the rim tape side. The radius of the adapter should fit most rim profiles.