I've been running a 2.25 Ardent up front and a 2.1 Advantage (both UST)out back for years. Loved the combination, been great all year round and nobody could get me off them. The Advantage is really grippy and the Ardent adds stability up front and all fast rolling.
...but lately the rear has been suffering from some proper wheel damage and punctures on the tyre bead on the rear and I've come to the conclusion I need something with more volume on the back.
The Ardent is more like a 2.3 and I was thinking of going for a narrow 2.25 on the back. I'm prepared to swap tyre manufacturer if someone says they've found the oracle.
Combination needs to suit everywhere, Lakes, Peaks, North Wales, and everything from very techy steep descents to fast boulder fests (which is where I've been suffering).
Any suggestions appreciated.