||17 Oct 2017
||Cassettes / Sprocket / Cogs
10speed use only.
For custom cassettes use.
Custom 10s,feel XX1 Driver train.
If u custom 40-42T cassettes cog.
And u buy this 16T.
Sure very smooth up and down shift.
Just take out 15-17T.
Put this 16T and 40-42T.
Power up climbing.
Sabah Sarawak add Rm10.
Be careful of deals that look too good to be true.
Scammers may post fake positive feedback on their own accounts.
Do not send money to unknown sellers.