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I remember massively over complicating this in the past and dragging a good mechanic's name down with me! The Hope BB outboard shells are narrower than Sram so you to space them to take out the slack. The final location of the chainline is set from the NDS so spacing too much on that side may cause fowling issues on the drive side. I can't remember exactly how I resolved it last time round but I've just fitted one to my Capo and with a 1mm spacer each side I have no issues. The lack of preload on Omnium's is a bit shit IMO but you should be able to get a well torqued setup without any binding or play.
jono84
Proper built up today!
Handles veeery differently than the volume, also will dig out my zipp drops to put on it. Then I can take proper pics!
One issue I ran into was making the Hope BB compatible with the omnium... which I actually failed to do, so now I have the old rugged Sram BB in.
I got a 24-22mm adapter so the axle fits nicely in the NDS bearing. However, I couldn't tighten the NDS arm on well enough to avoid any lateral movement. I'll put 2 bad pictures up to show the difference between the axle that shows outside the cup.
With Sram's GXP BB:
With the Hope BB and adapter:
See the green grease-spots that's visible when it's the Hope cup on, but not when installed in the Sram GXP
(I have the dustcap which fits on the spindles tightly, just not put on for the pics.)
Now, I have some spacers for the BB and I'm aware using that could eliminate any lateral movement. However, this would make it work so I practically tighten the entire crankset together, meaning the driveside will rub against the bearing as well. I'd rather make it work as Sram originally intended GXP to work - only tighten the NDS bearing from 2 sides, and let the DS float. But it seems I'm either missing a spacer or Hope's bearing is narrower than Sram's?
Anyone got any tips to make the Hope BB work with omnomnoms?