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Designed to hold up to 100lb/46kg of cargo
These attachments then fit into an 8mm ball detent swivel head that has a 4mm opening for hex bits
Pass-through channels allow eyewear to be easily stored on the front of the helmet
Cassette/Freewheel 18t
• Chain Connection Type Single Use Master Link
Shimano BT DN300 Built In DI2 Battery Mountain Bike Helmets Designed to hold up to"The new DN300 battery features the same waterproof design that Di2 users have loved for generations. Now with 3 ports, it delivers stable power to Shimano's 12 speed road derailleurs and shifters (if a fully wired option is selected). With the same size as its predecessor, the slim DN300 battery can be housed inside seat posts or frames ensuring a clean aesthetic. Now with 3 ports, the DN300 simplifies wiring to front and rear derailleurs, supplying
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