My guess would be 390mm B135 SSB https://southerndistributors.co.uk/product/nitto-b135-randonneur/
My guess would be 390mm B135 SSB
A lot of other people think it´s that, too, but it seems the ones in the photo I posted have a lot less reach. Could be off course the way they´re mounted.
@Petteri started
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My guess would be 390mm B135 SSB
https://southerndistributors.co.uk/product/nitto-b135-randonneur/