September will see the UK debut of the new PowerTap G3 hubset (G3 representing third generation). The current SL+ front and rear hub with a carbon fibre window cutout to save weight will become obsolete. That shell has been scrapped in favour of a greatly pared down hub body absent any flashy visual features. The flange of the rear wheel has been made wider for greater stiffness, has been reduced in size and is significantly lighter at 325 grams. For comparison, the existing PowerTap SL+ hub weighs in at 412 grams. There is also a PowerTap G3C version with ceramic bearings. I think it is a sleeker, better looking hub than previous versions with a black finish being more in keeping with the demand for black components on modern bikes.
Also of interest is a claimed increase in service and repair. The thread-off cap for the rear hub now houses the unit’s electronics (the replaceable battery and antenna) and this means the user now needs only send back the cap (and PowerTap can then send out a replacement) and not the entire rear wheel for a replacement electronics pack.
CycleOps also debuted a revamp of its PowerTap Pro hub. It too gets a weight reduction at 20 grams of savings to 440 grams, a cosmetic re-design and has a 15mm alloy axle.