How many wheels have I gone through now? Three? The Wolber Profils were not stiff enough, the Ambrosio Cronos were okay but I kept breaking spokes and cracked the rear rim, hopefully this time I've
finally got it right! Kinlin XR22t, 28h 2x/3x F/R, so clinchers this time rather than tubs, those are being saved for some 50mm carbon tubs on those Dura Ace 7900 hubs.
They both came in significantly under-weight (claimed 450g), which was very pleasing.


They built up very nicely, and I was able to reuse the same Sapim Laser spokes from before by changing the front from radial to 2x and the rear from 2x to 3x.
1451.5g for the set, with a small piece of Tesa 51608 tape over each spoke hole, as far as I know this is the lightest rim tape solution at ~1g per wheel.


My thinking for this wheelset was to split the difference between the stiff, durable, and importantly
clincher but very heavy Mavic Open Pro's, and the light, great riding, but flimsy Ambrosio tubs. These wheels are nice and stiff, pretty light, and I'm comfortable riding them in the grubby, bumpy back lanes far from the latest train station.
Here's the build as it is right now.

I should update the thread title, sub 6.5kg went out the window with the power meter and these wheels, but I'm sure I can claw it back to sub 6.8 with new pedals, expander, etc.

It's been on one ride just to test it out even though it's winter, felt great, got very grubby, now put away until spring.