Dogtrousers
Kilometre nibbler
Both Apidura and Alpkit do them.
https://www.apidura.com/product/top-tube-pack-extended/
https://www.alpkit.com/fuel-pod
And as far as terminology goes, "crossbar" is just as good as "top tube". They both mean the same thing.
https://www.apidura.com/product/top-tube-pack-extended/
https://www.alpkit.com/fuel-pod
And as far as terminology goes, "crossbar" is just as good as "top tube". They both mean the same thing.