Bell Division Helmet - L - Sky - AS-NZS 2063-2008 Standard YGroup_7033445646381 The rounded edges refer to

The rounded edges refer to the outside edges that have now been rounded off to allow easier wheel changes and make them less likely to inflict injury

11-42T 491-grams (claimed)

Weight: 34g

If you're looking for the best possible protection

but as cassettes began to move past 10 speeds on their never ending quest to grow as large as your wheel

Bell Division Helmet - L - Sky - AS-NZS 2063-2008 Standard YGroup_7033445646381 The rounded edges refer toLOW PROFILE The Division BMX and action sports helmet marks the end of an erano more bucket like, ill fitting street and dirt helmets. This new design has a lower profile than most skate and BMX style helmets and is curved in more at the back and sides. The result is a head hugging shape that fits more securely and looks great too. SPECIFICATION WEIGHT: 434 Grams VENTS: 10