Shimano UN300 Bottom Bracket English 68 x 122.5mm, 47.5mm Chainline 250mm Use this ANT+ antenna to

Use this ANT+ antenna to connect an ANT+ trainer to your computer

Even during maximal efforts up a climb or nearing the finish line

Connect a head unit or computer

Weight: 252g (based on 114 links)

Shimano UN300 Bottom Bracket English 68 x 122.5mm, 47.5mm Chainline 250mm Use this ANT+ antenna toSHIMANO quality performance cartridge bearing square bottom bracket Better chainline stability with chain line stabilizer Series: Shimano Tourney TX800 Series Fits JIS square taper cranksets Available in regular fit or fit for a full enclosed chain case Hollow spindle Crankarm fixing bolts sold separately Adapter material: Aluminum