Spearfishing will net you some EXP, but its not necessarily the best way to go about leveling, especially as it only unlocks at Level 61
A sling bag is also typically smaller and more lightweight than a standard backpack, with just one strap instead of two
New cartridge brake pads would definitely feature early on our upgrade list as we felt the standard ones were not quite strong enough but then, the Defy frame is so good its worth whatever money you can throw at it in terms of lighter wheels and cockpit kit
If your goal is simple inspection, stain detection, scorpion scanning or glow effects, choose the correct UVA product instead
The peak visor detaches completely, and HJC includes side plates (plugs) to cover the attachment points when you ride without it
If youre mostly running, go with a vest-style pack designed for it