Shimano BMR1 and BRM2 Di2 External Battery Mount Base Unit A CheckoutSpec= and Bushing Assembly Kit A more compact and lighter

A more compact and lighter version of the original e-pump that delivers up 80psi in just 60 seconds

High grade polymer pulley wheels (12T upper 14T lower) allow for smooth chain running and secure retention

40 TPI 60x2TPI Tire Width 2

Rim Internal Width 20mm Rim Tape Material Rubber Wheel Diameter 26 Wheel Diameter 26'' Rim Internal Width 20Mm

Front/Rear RR Cassette Body/Freehub 3s Int Hole Count 32H Spacing/Axle B/O-NUT 3/8x26t Material Aly Color Sil Weight 1080g Brake Type 6B Spacing 135 PCD-L PCD-R LTF-L LTF-R CTF-L CTF-R

Shimano BMR1 and BRM2 Di2 External Battery Mount Base Unit A CheckoutSpec= and Bushing Assembly Kit A more compact and lighterShimano Di2 External Battery MountsAll Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions Use Di2 system checker to update component firmware from http: e tubeproject. shimano. com