just noticed dugast make some, and at €15, not too pricey
https://cyclocrossracer.co.uk/products/dugast-latex-inner-tubes
Guess those Dugasts are the widest latex tubes available? I could be half tempted to try them on fast touring tyres like hypers or marathon supremes; I guess above 35mm people are using road tubeless?
@Thrustvector started
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just noticed dugast make some, and at €15, not too pricey
https://cyclocrossracer.co.uk/products/dugast-latex-inner-tubes