Bar diameter for Genesis Croix de fer 20 (2015) I would like to switch my stem for angle adjustable one and I am having trouble identifying the clamp size for the Gensis, Croix de Fer 20 (2015).

I do not see the stem/bar clamp spec listed.

There are various adjustable road stems :


Ritchey adjustable road: 25.4mm bar clamp   
Deda adjustable road 31.8mm bar clamp


These both seem to be standard road stem/bar clamp sizes, I am not sure where to find which one Genesis use documented.
Thanks to renesis and Batman, I used masking tape to measure bar clamping circumference.

100mm circumference =&gt; 31.8mm diameter.