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MY15 Tarmac Headset (S152500003)

Christofer Sep 19, 2016 08:32AM PDT

So, I went through my local dealer and they ordered S152500003, which is supposed to include every variation bearing for the MY15 tarmac headset....but this isn't the case. I have a 58cm frameset, and the bottom headset bearing seems like it should be 1.5". The largest bearing in the S152500003 set, though, is 1 3/8", which definitely does not accommodate the fork for my 58cm frame. I'm curious why the part set includes two 1 1/4" bearings for the top, but not all of the bearings necessary for the bottom headsets.

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