Shimano FH-M590 Left Cone+Locknut
Replacement Left Cone and locknut for Shimano freehub FH-M590. The cone also fits FH-T660.
Shimano Part Number: Y3SV98020.
The cone itself works fine as a replacement for Shimano Part Number Y3D698030, (Left Cone/Locknut from Shimano FH-T660) The spacer is 0.4mm thicker, and the locknut 0.5mm thinner according to our measurements so we recommend using your original ones if possible if you're servicing an FH-T660 hub. However, as it's a swings and roundabouts situation, you should be able to replace the complete 3-piece assembly without a problem.
Cone: M10 x 15mm. Weight: 26g.
We recommend always replacing the balls when servicing a hub or replacing cones.
A hub that uses this cone will use 1/4" balls x 18 (9 per side).
We recommend using Grade 25 balls (high quality balls) with these cones.
You can use the links on the right to go directly to the recommended balls - either individually or in the relatively economical pack of 100.