I serviced this hub on my Canyon a few weeks ago. It's about 18 months old and springs, pawls etc all looked Ok. I cleaned it up and used light wet chain lube; Finish line I think.
It has worked great since in the cold & wet but I was up on Harden Moor last week with the temp about 1-4deg C and found that the freehub would not engage properly; just a bit stiff in rotation with no pawl noise or power transfer to the wheel. It all was back to normal when I go home so can only think it might be some low temperature problem, perhaps due to the viscosity of the lube or metal contraction. It did this once before when below freezing (before recent service) but is usually fine in the cold; all a bit mysterious.
Any one on the STW massive come across this?