INGRID Road 12 Speed Cassette - SRAM Lusty 15mm) spacers are included to

15mm) spacers are included to dial-in fit

6 mm thick) is best for lighter off-road riding or gravel/cyclocross applications

even over long training hours

Rockshox Maxima Damping Fluid for rear suspension

also use it on your Road 11-speed hub or home trainer

INGRID Road 12 Speed Cassette - SRAM Lusty 15mm) spacers are included toIts a single 12 speed road, gravel cassette with a total range of 400%, the same of a double road system. Yes, no any miracle, except for simplicity vs some big gap at the extreme of it, optimizing the middle to make it smoother in the mainly used srockets. We started with the 11t sprocket to minimize friction and power loss and at the same time use normal chainring at the front. Of course it could be fitted in old shimano HG freehubs. But even in XD