Reach
● This is the horizontal distance from the centre of the bottom bracket (BB) to the centre-top of the head tube. If the seat tube angle stays the same, a longer reach lowers your ride position, a shorter reach means you sit more upright.
Stack
● The vertical distance from the top of the head tube to the centre of the BB. A taller stack means a more upright ride position, a shorter stack a lower one.
Groupset
● All the parts involved in braking, changing gear or running the drivetrain. This includes the shifters, brake levers, front and rear brake callipers, front and rear derailleurs, crankset, bottom bracket, chain and cassette.
Compact v sub-compact crankset
● A compact crankset has a 50-tooth outer chainring and a 34-tooth inner…
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Cycling Plus (Digital) - 1 Issue, April 2025