Garmin Time Trial Bar Mount - Black MFPN=SP21EA70AXDP27.2X350X50 If you have a BB30

If you have a BB30 crankset (30mm diameter aluminum spindle) this measurement will determine whether it is a long or short spindle:

Features water proof zippers and Topeaks Rail Wing system to securely attach the bag while also allowing for access

For snow temperatures from -4° C to -14° C (25° F to 7° F)

Strap Dimensions 2" wide x 16" long

Weight: 28g per pair

Garmin Time Trial Bar Mount - Black MFPN=SP21EA70AXDP27.2X350X50 If you have a BB30This mount was made specifically for Trialists and Triathletes. You can easily attach your Edge cycling computer and quarter turn accessories to TT bars TECH SPECS Mount Type TT Bar 22. 2mm Primary Color Black Misc Garmin Material Composite