We use the tacx ones at work, seem like an upgrade for anything under ultegra, 4050 for that mech.
I just had a look at the tacx 4050 and they don't appear to be for 11speed? Atleast they aren't listed on the tacx website if you select 11speed. Some websites say they work with 11speed though.
I know they work well with 11 speed, I'm reasonably sure the leaflet in the packet says 11 speed too but I'll check tomorrow.
All the speeds (not including under 8 or above 11).
@farewell started
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We use the tacx ones at work, seem like an upgrade for anything under ultegra, 4050 for that mech.