smith adult network mips bike helmet a New trail Smith Persist MIPS Helmet Black

See the table at the bottom of this page to compare motor systems and power levels

20cm x 6.5cm x 15cm (7.9" x 2.6" x 5.9")

Purchase one here

And with a wide size range of 54-60cm (with two sets of pads to dial in fit) this isnt going to be just a youth helmet

Dimensions (H, W, D): 52 x 34 x 15-20 cm

Dimensions Preparation Shopping List 2 - 2x4 @ 8 feet long 1 - 1x8 @ 8 feet long 12 - 1-3/4" self tapping star bit screws Cut List 2 - 2x4 @ 95" - long point measurement, one end cut at 5 degree off square (this is the bottom end) 3 - 1x8 @ 31-3/4" Instructions Step 1 Cut the legs so they are at an angle at the bottom so the rack leans against the wall Lay out on a flat surface and attach the bottom rung, 9" space below it