Had a couple of rides on a set of wheels with the Stans ZTR alpha 340 rims - they were OK but seemed to flex a bit too much for my liking & wanted something even lighter - so took the gamble on the (supposed to be) 1180gm AC Tubeless rims. So far so good. For the weight, they are plenty stiff enough. Look great as well....
Loving the Tubeless rims & tyres - no more punctures & roll so well. AC's are nice & wide, so running IRC Formula Pro Tubeless Light tyres in 23's are more like 25's, so nice & comfy. Rear Hub design is good & the free hub has a really nice positive action to it..
Some negatives....not sure where my rims porked it up, but measured real weight is 556/702 for a total of 1258gm without valves or skewers. Not really close to 1179gms as advertised
Combine that with the supposed to be 240gm IRC Pro light tyres which are really 260gms each & the combo is 120gm more than I was hoping for !! (still bloody light though)
Also, the AC Valves are a nice design, but my pump uses a screw on presta attachment & the valves will loosen the locking nut when airing up....keep getting leaks from the valve o'rings. Extra sealant seems to have limited the air lose, but they always need tightening - considering some locktite to fix ??
Front wheel also had an annoying tick that a spoke tighten has seemed to have cured.
All up - still really happy with them. My goal was to go tubeless with a wheelset even lighter than my Dura-ace C24 CL's + Vittoria Diamante Pro Clincher tyres & they are....just wish the weights were actually as advertised.