Which Di2 grommets for a 2015 Focus Mares CX?

[dolface]

I'm building up a 2015 Focus Mares CX w/ Di2 and don't know if it need the 6mm circle ones, or the 7x8mm, anyone have any idea?

[eBAUMANN]

I got oval ones and my frame had circle holes...surprise! They fit fine anyways. So, given that I'd say get the oval as they work with either shape hole.

[shovelhd]

The grommet ID is what matters. The larger ID is for 7970, the smaller one is for E-Tube.

[dolface]

The grommet ID is what matters. The larger ID is for 7970, the smaller one is for E-Tube.

Thank you, that makes sense but is new info to me.

Gonna reiterate it here in case anybody searches on it in the future.

for e-tube you need 6mm grommets.

[oldpotatoe]

Thank you, that makes sense but is new info to me.

Gonna reiterate it here in case anybody searches on it in the future.

for e-tube you need 6mm grommets.

IF the frame is also made for EPS, they use a 7mm 'hole' and grommet, so I suspect a 7mm one.

[shovelhd]

Just to add clarity to the mud, there are Shimano grommets and frame vendor grommets. They may not be the same. If your frame vendor offers a grommet kit, I suggest that you use those.