Edit – the plus 2 links is not a good start for 1 x 9, the formula for 3 x 9 is big to big plus 2 links is only okay because you should never actually ride big to big. Setting up a 1 x 9 in the same manner will prob result in too short a chain when riding on the largest sprocket.
Hense why this…
Best and most trusted 1×9 chain length calculator I’ve used is –
Shift the bike into 1st.
Remove shock spring/air from shock.
Compress the suspension.
Fit the chain, add or remove links until the mech is almost at full stretch.
If its 1×9 on a hardtail then
Shift the bike into 1st.
Fit the chain, add or remove links until the mech is almost at full stretch.
works best