Chain

Dirty chain testing:

• https://www.youtube.com/watch?v=aFwkW0CY7qA
• lose like 8 watts default by using chain
• lose up to 4 watts max with really dirty chain
• lose many watts if in small cog due to tighter rotation of each steel cylinder in the chain
  • 14.5 watts in smallest gear
  • and chain line didn’t make much difference
  • 7 watts on biggest gear :)
  • 1 watt = 5 seconds on a 25 miles time trial…