Ebike Chain Lubes | Electric Bike Forums - Q&A, Help ... Second chain: Used muc off dry mostly, later stages switched to Dumonde tech. Chain stretched to 0.5 in around 800 miles and done in 1100 miles. Half winter half summer riding. Third chain: Used Dumonde tech exclusively, Chain is stretched to 0.75 in around 1000 miles. Prolink gold: This is a cleanish, light lube.