For 51cm the weight for the finished frame with paint and hardware should be around 1050g ..

---

*
___/\___/\___/\___ the s u r f b o a r d of the K u r p f a l z is the r o a d b i k e .. oSo >>

My 2015 S5 54cm (Black with white logos) frame without hardware weighed 944 grams
My 2017 S5 54cm (Black with red/white) frame wihtout hardware weighed 982 grams

Derailleur hanger and rear brake adapter weigh around 24 grams if I remember

Oha, the difference between sizes is bigger than I estimated ..

---

*
___/\___/\___/\___ the s u r f b o a r d of the K u r p f a l z is the r o a d b i k e .. oSo >>

Why is the 51cm heavier than the 54? That doesn't seem to make intuitive sense.

.. yes, that's why it is vice versa ..

---

*
___/\___/\___/\___ the s u r f b o a r d of the K u r p f a l z is the r o a d b i k e .. oSo >>