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Am I the only one who thinks carbon paste on seatposts is a scam?
I have been building and fixing bikes for 12 years at a shop in Denver, and I keep hearing new mechanics tell every customer that they need carbon assembly paste on their seatpost or it will slip. Last week a guy came in with a creaking post on his 2021 Trek, and the first thing the kid next to me said was to slather on the paste. I cleaned the post and the inside of the frame with isopropyl alcohol, torqued it to 5 Nm with a proper wrench, and it has not made a sound in 6 days of hard riding. The grit in that paste can wear down the clear coat on a carbon post over time, and most slippage comes from grease or old paste residue, not from the post itself. I get that some frames and posts have loose tolerances, but reaching for paste first is lazy. Try a clean rag and a torque wrench before you buy a $15 tube. Has anyone else seen paste actually cause more harm than good on a seatpost?
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