Having struggled a little to gain some traction last winter with the factory fitted Specialized Ground Control tyres that came on the Rockhopper I took the advice of my LBS and fitted a pair of Storm Control also from Specialized.
No sooner were they on, my grip improved in the wet muddy conditions. They cut through the mud well. I have left them on all year and haven’t had much in the way of problems to warrant changing them.
I mostly ride my 29er XC and on rolling terrain rather than on gnarly downhill and technical obstacles. There have been the odd sketchy moment on wet roots but I have learnt to deal with that (what tyre can truly cope with wet roots?) and the ability to beat the mud has defined these tyres for me. You won’t get one tyre that can deal with everything – but the Storm Control on my 29er has been plenty of tyre for me on this bike over the last 9 months or so. While I have been tempted to put some wider more aggressive tyres on for the summer, they rolled and rode well and with the wet weather coming they will stay put for another winter.