The Essential List
Helmet: non-negotiable. Every session, every time. A certified CPSC or ASTM helmet takes one hit well — after a significant impact, replace it even if it looks fine. Budget: $40–80 for a quality certified lid. Mid-range protects as well as premium for most falls.
Flat pedals with pins: the stock plastic pedals on most bikes are fine to start. Once you're moving, a pair of metal platform pedals with traction pins dramatically improves control. $25–50.
Grip tape and grips: fresh grips improve bar control significantly. Replace them when they start slipping. $10–20.
Recommended but Not Urgent
Shin guards: if you're learning flatground tricks, you will catch pedal strikes. Sixsixone or 661 shin guards ($30–40) save your shins. Worth it within your first month.
Knee pads: more important for ramp and park riding than street. If you're riding transitions regularly, soft-shell knee pads ($30–50) reduce the sting of learning on concrete.
Skip for Now
Gloves: personal preference, not a safety essential for most riding. Full-face helmet: overkill unless you're riding dirt jumps at speed or downhill. Expensive components: don't upgrade parts on a starter bike. Ride what you have until you outgrow it, then upgrade the whole bike.
The Upgrade Order
When you're ready to improve the bike: pedals first, then grips, then tires. After that, if the frame and fork are solid, upgrade wheels. The frame is the last thing to replace — it's the most expensive and the most personal choice.
Summary
Helmet and shin guards and you're covered for the first six months. Resist the gear upgrade itch and spend the money on riding time instead.