Can you increase the tension of the spokes to reduce the play or is the flex in the rims themselves
No, the rim can get damaged.
I think if one cares about how flexy the Zipps are it's better to get them build with 24 spokes, better lacing and better hub.
Or get ENVE that can supposedly have more tension... NOT that I am knowledged enough to say it's better.
But my side to side play is definitely caused within the hub...
I have just ordered new bearings, which are marked as C1 (tight clearance). Maybe it will make some difference, maybe not.
Will keep you posted.
I met a guy with Venge, here's his information:
I watched your video and it seems like there are a bit to much play.
I checked my wheels which i ride on a Venge Pro. My wheels are 2012. Yes, there are some play and a bit of softness. If i push really hard I can make them move fore 3mm to each side. I have ridden the my 404's with the ceramic bearings more than 6000km this summer. If i get out of the saddle at 52-11 and putting all pressure i got (185cm 80kg) i can make them scrape against the brake pads.
My Venge got a lot more room between the chainstays than your sl2. I have had a lot more problem with other wheels. I think the ZIpp wheels are one of the best, because of the easy maintenance and ride quality. The bad side is that they are a bit soft side to side. My original Roval rapid sl45 are much stiffer side to side, but the weight is 1850g. Im probably changing for a Tarmac s-works sl4 next year, just thinking about the choice of wheels. Maybe i should try with the 404's on the frame before buying...
Life's too short to smile for reason.
I am Zipp 188 hub