Essential Bicycle Tools: The Kit That Covers 80% of Jobs
A home workshop does not need many tools. It needs the right twelve, one of which is a torque wrench, and a clear idea of which jobs are worth doing yourself.
Hex keys
| Size | Used for |
|---|---|
| 2 mm | Derailleur limit screws, some computer mounts |
| 2.5 mm | Cable clamps, small bolts |
| 3 mm | Bottle cage bolts, some clamps |
| 4 mm | Stem, seatpost, brake levers, racks |
| 5 mm | Stem, saddle rails, most frame bolts |
| 6 mm | Stem, crank bolts, pedals |
| 8 mm | Crank bolts, some pedals |
A set of 2–8 mm covers almost every bolt on a modern bike. Buy a set with a ball end so you can reach awkward angles, and keep a separate 4 and 5 mm on a T-handle for the bolts you touch most.
Torque range
| Range | Covers |
|---|---|
| 2–20 Nm | Stem, seatpost, bars, saddle, rotors |
| 5–25 Nm | The same, with more margin |
| 20–60 Nm | Cassette lockring, pedals, bottom bracket |
| 40 Nm+ | Cassette (40), some crank bolts (35–50) |
A 2–20 Nm wrench handles everything a rider should be tightening by feel; a 20–60 Nm wrench is for the two or three high-torque jobs. Buy the 2–20 first — carbon components fail from over-tightening, and that range is where carbon lives.
The twelve tools
| # | Tool | Job |
|---|---|---|
| 1 | Hex set 2–8 mm | Everything |
| 2 | Torque wrench 2–20 Nm | Anything carbon |
| 3 | Tyre levers ×2 | Punctures |
| 4 | Track pump with gauge | Pressure, tubeless seating |
| 5 | Chain tool | Chain replacement |
| 6 | Chain checker | Wear measurement |
| 7 | Cable cutters | Cables and housing |
| 8 | Cassette tool + chain whip | Cassette changes |
| 9 | Bottom bracket tool | BB service |
| 10 | Screwdrivers (PH2, flat) | Limits, adjustments |
| 11 | Pedal spanner | Pedal removal |
| 12 | Torque bit set | Odd fasteners |
That is the whole kit. Everything else is a specialty tool used once a year, or a job for a shop.
Specialty tools worth owning
| Tool | Cost | Job | Frequency |
|---|---|---|---|
| Cassette lockring tool | $12–20 | Cassette swap | Yearly |
| Chain whip | $15–25 | Holding the cassette | Yearly |
| Bottom bracket tool | $15–30 | BB replacement | Every 2–3 years |
| Brake bleed kit | $25–60 | Hydraulic brakes | Yearly |
| Rotor truing tool | $10–15 | Bent rotors | Occasionally |
| Derailleur hanger alignment gauge | $40–70 | Bent hanger | Rarely |
| Headset press | $50–90 | Headset install | Shop job |
Buy the first four when you need them; borrow or pay a shop for the rest. A hanger gauge costs more than three shop alignments, and it is used once every few years.
Wear items the kit covers
| Item | Interval | Tool needed |
|---|---|---|
| Chain | 2,000–4,000 km | Chain tool, checker |
| Brake pads | 1,000–2,000 km | Hex 5, sometimes 2.5 |
| Cables | 5,000–8,000 km | Cable cutters |
| Tyres | 3,000–5,000 km | Levers, pump |
| Rotors | 10,000 km+ | Torque wrench |
| Bar tape | Yearly | None |
Those six items are 90% of what actually wears out, and the twelve-tool kit covers all of them.
Cost by level
| Level | Contents | cost_kit |
|---|---|---|
| Starter | Hex set, levers, pump, chain checker | $60–100 |
| Home basic | Plus torque wrench, chain tool, cutters | $150–230 |
| Home complete | Plus cassette, BB, bleed kit | $280–420 |
| Full workshop | Plus hanger gauge, press, stand | $600–900 |
The jump from starter to home basic is the one that matters: the torque wrench and cable cutters turn “I should take it to a shop” into a 20-minute job.
Storing and maintaining the kit
Keep the torque wrench at its lowest setting when stored — a spring left compressed loses calibration, and an uncalibrated wrench is worse than hand-tightening. Wipe tools after use, and keep the chain tool and cutters oiled; they are the two that rust first.
Replace worn hex keys rather than forcing them. A rounded 4 mm key chews the head of every bolt it touches, and the bolt is usually the more expensive part.
What not to buy
Avoid complete “200-piece bike tool kits” — most pieces are for jobs you will never do and the quality is poor at the price. Avoid cheap torque wrenches without calibration; a $25 wrench that reads 20% high is worse than no wrench.
Buy individual tools as jobs arrive. The kit that grows with your skill is cheaper and better than the kit bought on day one.
Where to go next
- Maintenance guide — what to do with the tools
- Chain maintenance — the most frequent job
- Roadside repair kit — the small kit for rides