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@andypancake
It's not just gold though... it's titanium nitride, which is why they are so expensive.
EAI Gold medal cog...
"Hands down, one of the best cogs in existence. Perfectly round. Perfectly threaded. Perfect tooth profiles. Coated with titanium nitride for optimal lubricity and durability, this cog is a top choice among pro racers."
£60... 4 times the amount of a regular cog.
Not MASH bullbars, they are Profile...
