I've got DT Swiss 470 rims on my 29er running ghetto tubeless with 24" tubes.
I've had a spare pair of wheels built up with Halo Freedom rims.
I want to use the new wheels today.
As they are wider than the old wheels, I don't think I will be able to reuse the rim strips on them.
I haven't got any more 24" tubes, but I have got some 26".
I put a 26" tube on the Halo 29" rim and it's stretched, but not as tight as a 24" would be or a 20" tube on a 26" rim.
Will it work, or have I got to go out and buy some 24" tubes before I can use the wheels ?

I've used a 26" on the freedom disc rim.
Not very tight but it worked.

ive used 20 and 26 on 29er rims and both worked fine

Thanks for that.
I'll give it a go then.

Always the gaffa tape option…

It worked.