109 mm

HATTA R9400, Track Racing Bottom Bracket Set. BSC 24x1.37 threading, ISO taper, 109mm axle width. Top quality, pro-race quality construction/tolerances. Mirror-polished bearing races!These are very popular with pro keirin racers in Japan, wherethey are mostly commonly matched up to Shimano FC7600 NJS cranksets. These work well with many modern pro-race square taper crank sets, such as..... Shimano Dura Ace FC-7600Sugino 75Sugino 75 Grand MightyVintage Sugino Super Mighty/Aero Mighty/Mighty CompetitionSuntour SuperbeSuntour Superbe ProCampagnolo Record Pista (Campa recommend 111mm, so this will probably give about a 1mm inboard chainline) Produced by HATTA, famous not only for their top quality bicycle components but also aerospace parts manufacturing. In stock ready to ship ASAP with Fedex Priority, 100% Made in Japan.