Grand Prix GT Folding Tyre Twinpack. The Grand Prix GT is a performance tyre with puncture protection and perfectly suited as a racey training tyre. The GTs use the same BlackChili compound as Continental race tyres. The wider PolyX Breaker layer helps prevent thorns and other sharp objects from getting through to the tube.
"Quick and grippy training rubber with decent puncture protection - the grip and feel of a top-end tread" - road.cc