The TCS Lidingöloppet WeekendEvent infoFAQTiming chip Timing chip The chip is attached to the back of the number bib. Do Not remove it. The timing chip registers your split times, approximately every five kilometres of the 30-km race, and your finish time. Timing starts when your start group has its time to start. Please dispose of the chip in the bins provided after the race. There is another chip on the back of your race bib. Do not remove it! It is an extra safety chip.