This is was [Last-Bikes (from Dortmund/Germany) has to say about this:](https://www.last-bikes-shop.com/epages/62262325.sf/en_GB/?ViewObjectPath=%2FShops%2F62262325%2FCategories%2FGLEN_V1)
They call it "total bearing quality".
> Machining the frame's bearing seats in one clamping on a highly precise 5-axis milling machine in Germany enables us to adhere to strictest diameter, form, and positional tolerances to avoid tensioning of the components during installation.
> All contact surfaces and threads for the bearing pins are also milled in one clamping.
April 20, 2020, 12:53 a.m. - danimaniac
This is was [Last-Bikes (from Dortmund/Germany) has to say about this:](https://www.last-bikes-shop.com/epages/62262325.sf/en_GB/?ViewObjectPath=%2FShops%2F62262325%2FCategories%2FGLEN_V1) They call it "total bearing quality". > Machining the frame's bearing seats in one clamping on a highly precise 5-axis milling machine in Germany enables us to adhere to strictest diameter, form, and positional tolerances to avoid tensioning of the components during installation. > All contact surfaces and threads for the bearing pins are also milled in one clamping.