As above, the boys new (to him) bike has tubeless ready rims but previous owner has drilled them out for schraeder valves.
Are there any options to revert to tubeless setup?

you can buy little inserts.. hunt around, amazon maybe?

Just buy schraeder tubeless valves… Work just as well as presta.
I’ve got both types on various bikes

I’m sure the tubeless valves I got for my lads bike had adapters schraeder drillings: https://www.bike24.com/p2102175.html

Is it 26in?

I believe I have some Stans rim strips with schraeder valves in the garage, unused.

27.5 Thanks though.

Just buy schraeder tubeless valves… Work just as well as better than presta.

FTFY

🙂

Shrader hole Shrader valves as said above

https://www.bike24.com/p2272511.html

Yep. Schraders on my 29er. Work a treat.

Brilliant. Thanks everyone.

I prefer Schrader valves for tubeless as the small Stan’s bottles fits perfectly in the end And they’re wider so less likely to get gunked up.

It could be because I always run ghetto tubeless with BMX tubes as well.