I'm sure I checked it, it was fine on the work stand, the gears shifted beautifully. In fact i thought to myself how nice shimano gears are to set up. I measured the chain against the old one so it wasn't too short or long, there were no stiff links as i checked for this. The join was by a "quick link" so no problems there. So why 8 miles into the ride as i sttod up to power up a steep slope off the canal did the chain break?
the force of suddenly having no resistance on the pedals catapulted me over the bars and then desperately trying not to roll down the bank at the side of the path and into the murky water!
Not the best ride I've had for a while.