Hubs: Stan's 3.30 hubs are available in 3 options, standard 3.30, which is the base product that Stan's uses when displaying weights on their website, www.notubes.com. Stan's does offer hub upgrade alternatives for riders who are looking to save weight or ride more aggressively. For riders who want to save weight, choosing the 3.30 Ti (Titanium) hubs will help you achieve this. For riders who plan to ride more aggressively and want a hub with oversized bearings, choosing the 3.30 HD (Heavy Duty) hubs would be a good idea. Not all hubs are available in every axle configuration, so please see the list of available options when choosing your hub options upon building your wheel(s). See weight differences below:
Hub Weight Differences:
Rear Driver Body Options: The standard Shimano / SRAM 9/10 speed driver body has always been there standard; however recently a new options was added to the market called SRAM XD, which is compatible with SRAM 11 speed drivertrains. If you're running a standard 9/10 speed drivertrain, then you'd want to choose the Shimano 9/10 speed option from the drivetrain list. If however you're putting this wheelset on a bike with a SRAM with a SRAM 11 speed drivertrain; you'll want to choose one of the 2 SRAM XD options instead of the Shimano 9/10 speed option.
Rear Driver Body Exceptions: