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- The four mandatory tools are a truing stand, a correctly-sized spoke wrench, a tensiometer, and a dishing tool — without all four, you can build a round wheel but not a well-tensioned or evenly-dished one
- Spoke nipples come in at least five sizes (3.23 mm, 3.3 mm, 3.45 mm, 3.96 mm, 4.0 mm and 5 mm hex) — using the wrong size rounds the nipple flats in seconds, so identify your nipple brand before buying a wrench
- Spoke tension for a road wheel sits at 80–120 kgf (kilograms-force) per spoke; a tensiometer reads deflection in mm and converts via a chart to actual tension. Match drive-side and non-drive-side within 5%
- Dishing is the wheel's centre: a dishing tool compares the rim's position relative to the hub locknuts on both sides. A perfectly tensioned wheel that is off-dish will rub the frame
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The four mandatory tools
A wheel is a tension structure, not a compression one. Spokes pull the rim toward the hub; the rim hangs in equilibrium. To build or service one, you need to measure three independent things: roundness (radial run-out), truth (lateral run-out), and tension (per spoke) — and a fourth to make sure the rim ends up centred over the hub.
Each measurement needs its own tool. A truing stand measures roundness and truth simultaneously by holding gauges near the rim while you spin the wheel. A tensiometer plucks a spoke and measures how much it deflects under a known force — that deflection converts to tension via a chart. A dishing tool sits across the hub locknuts and reaches out to the rim on both sides, telling you whether the rim is centred. And a spoke wrench is what you turn the nipples with to make every adjustment.
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The essential kit
Buy these four first. Everything else is a convenience.
| Tool | What it does | Entry-level pick |
|---|---|---|
| Truing stand | Holds wheel, gauges radial/lateral run-out | Park TS-4.2 or Minoura FT-1 |
| Spoke wrench | Turns the nipple; sized to the nipple flat | Park SW-0 through SW-4 set |
| Tensiometer | Measures per-spoke deflection → tension | Park TM-1 or Wheel Pro Tensiometer |
| Dishing tool | Confirms rim is centred over hub | Park WAG-4 or Var 12 |
| Nipple driver | Spin nipples on quickly during lacing | Standard flat-blade 0.136" (3.9 mm) |
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Spoke wrench sizing: get this right
Spoke nipples come in a maddening variety of sizes. Using the wrong wrench is the single most common way new wheel builders ruin nipples — a 3.30 mm wrench on a 3.23 mm nipple rounds the flats in two turns, and the nipple is then scrap.
The five common sizes are 3.23 mm (DT Swiss and some Wheelsmith), 3.30 mm (most DT Pro Lock and Sapim), 3.45 mm (some larger DT and Pillar), 3.96 mm / 4.0 mm (Sapim Polyax and some older Mavic), and 5 mm hex internal (modern DT Squorx and Sapim hex-head nipples used on deep-section carbon rims). Buy a set of all four external sizes — the Park master set SW-7 covers them — and use the internal 5 mm hex on the deep carbon wheels that have it.
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Reading a tensiometer
A tensiometer pushes against the middle of a spoke with a calibrated spring and measures how far the spoke deflects. The reading is in millimetres of deflection, not in tension directly. You look up the deflection on the chart that came with the tensiometer (each one is calibrated to its own spring and to the spoke's cross-section) and convert to kilograms-force (kgf) or newtons.
Target tensions: road rims 90–120 kgf per spoke on the drive side, 50–70 kgf on the non-drive side (the difference dishes the wheel for the cassette); mountain bike 90–130 kgf drive, 70–90 kgf non-drive. Within a side, match tensions to within 5%. A wheel built to correct average tension but with one spoke at 60 kgf and another at 130 kgf will go out of true within the first 500 km.
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Optional kit that earns its keep
Once you are building more than two wheels a year, these pay off.
| Tool | Why it helps |
|---|---|
| Nipple holder (magnet or vacuum) | Pulls the nipple into place through deep carbon rims |
| Sapim / DT Pro Lock nipples | Pre-applied threadlocker prevents detensioning over time |
| Linseed oil or Spoke Prep | Lubricates the thread at build, dries to lock the nipple |
| Light truing stand gauge | Reduces lateral run-out from 0.5 mm to 0.2 mm |
| Spoke ruler | Cuts spokes to identical length before lacing |
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Tolerances that define a 'good' build
A finished wheel is judged on three numbers. Lateral true: rim moves no more than 0.5 mm side-to-side when spun in the stand (0.3 mm for high-end carbon). Radial true: rim moves no more than 0.5 mm in and out (0.3 mm for carbon). Dish: rim is centred over the hub locknuts within 0.5 mm — checked by flipping the wheel in the stand or using the dishing tool on both sides. If all three are within spec and spoke tension is balanced within 5%, the wheel will stay true for thousands of kilometres.
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