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Attic What IZIT #13

by Bikeman • August 30, 2023

We had a lot of fun with the Attic What IZIT back in the day. We'd dig up some of the more obscure parts hiding here and put it out to our loyal visitors to come up with what it is. Bikeman would always know of course but it was entertaining to see how long it would take for someone else to come up with the correct answer. We would post the answer so the winner could take a victory lap. In the event of multiple correct answers we would post the most complete or creative one. We'll try to dust one of these off each week and keep the excitement going of what will pop up next.

Originally Published early in this century

It is a pulley wheel! Now that we have that bit of info out of the way we want to know more about the little round disc pictured here. Specifically we need the manufacturer, the model derailleur that it fit and your best guess as to why anyone would design a pulley with this configuration. The most creative answer with required elements will win a pair of Bikeman socks and a waterbottle.

Well #13 was not lucky for the Attic faithful. We had only a few brave souls venture a guess, but in the end there can only be one winner.

The Winner is Chris Webber

"Hey there, my name is Chris Weber, that right there appears to be a top pulley from an ESP (pre-X series) Sram rear derailleur. designed to keep the chain a constant distance from the teeth of the cogs for better shifting."

Name That TOOL #11
Name That TOOL #12