Aye davo, my optimistic fag packet calculations came in at around 1650g if the rims were at the lower end of the LB quoted weight range, but they are probably closer to 1700. Not much more than a 100g saving over my alu Havens, but they are a hell of a lot stiffer, and 1700g is still a pretty decent weight for a burly 35mm 32h 29er wheelset considering Hope’s new 29er Enduro wheels (and Pro2 Flows) are the best part of 2kg. Since building the wheels I’ve only ridden them at Glentress and Inners, but I’ll be heading up my local hill on Sunday morning where they will be treated to a right good thrashing on fast rock steps, drainage bars, and the longest rock garden in the area where many a rim has been dented and bent. I’m really looking forward to seeing how the LB rims fair over the coming months.
I’d probably ask for a rebuild to the requested specification if I was in the same position as you, but good luck with the wheels whatever you decide to do.