170mm 53/39
Used for 100km, chain was dropped over top ring and caused 2 cosmetic scratches, very superficial only really notice up real close,
Replaced only due to very fussy owner, cranks where only fitted brand new 4days ago so grab a bargain
New chainring geometry for faster shifting up and down
New chainring bolt system - threaded inner chainring
Lightened Ultra Torque spindle
Special bicolor graphics


