Hello, can someone tell me the dimensions of the steering head bearings?
Thanks

at 50 you are young, I would always take the small frame. The big one only if your torso is very long
I can with 180 cm 58 riders but have 56 and am very satisfied with 87 cm step

I want to get this frame but I am not certain which size would best fit me (49cm or 52cm).  I'm 5'4.5 with a 29" inseam, 50 years old.  I am currently riding a Trek Emonda 2015 52cm with a 80cm stem.  I am leaning to towards the 49cm frame since the offset in the seatpost would add to the effective top tube length and reach.  My concerns about the 49cm frame is the low stack.  I'm not sure if my 50 year old back can handle such a low stack.

the few grams don't make it, I also have the same translation, but only 28 teeth at the back,
get along great with it

Yes. I think Red is about 300g less than Force. I did however save a little weight on the wheelset (weight is 1300g, very light for 50mm depth), carbon saddle (115g), tubolitos (2x40g), tires (240g each), and bartape (50g).

Class! What was your cost?

It's done

Velobuild VB-R-168
SRAM Force AXS Disc 12v
Cassete 10-33
Crankset 46/33 - 165mm
Elitewheels Drive 50D
Pedals - Favero Assioma Duo
Tires Continental GP5000 Cream 25c
Tubolitos
Bartape Lizardskins 1.8mm
Garmin Edge 830
Garmin Varia RTL515

Weight: 7.6kg
(With pedals, garmin mount and bottle cages)

you then have to work with discs to get the distance

On most bikes you can easily insert the bearings. But if you can easily move it back and forth, sideways, you can't.

VB took it out of the program because it was criticized for being too soft. But that's not the case for me. You go through the thread.