The lightest and best performing groupset bar none, but you’ll pay handsomely for it. It’s aimed at XC racers and riders wanting the lightest possible trail bike setup, and dumps the traditional 3×9 drivetrain setup for a dual-ring chainset configuration, along with lots of smart weight saving tricks.

The pursuit of lightness has paid off in spades, the whole lot hits the scales at under 2.3kg, that’s some 300g lighter than the already damn light Shimano XTR!

Best price: £1,225