Re: Re:
They are designed optimally for 11-speed derailleurs. Dia-Compe sells another set that works for up to 10-speeds. It will have to do with how much 'cable wrap' the shifter can manage.
https://www.sjscycles.co.uk/gear-shifte ... ol-silver/
https://velo-orange.com/collections/shi ...
Re:
Not cheap, but Dia Compe makes an 11-speed downtube shifter set.
https://www.sjscycles.co.uk/gear-shifte ... -shifters/
And Microshift offers 11-speed bar-end shifters that can be set to friction mode.
https://www.microshift.com/en/product/bs-m11/