Spoke tension calculator

Multi-tensiometer wheel tensioning — not just Park Tool. Pick your tool and spoke, enter each reading, and balance the wheel with the live radar, per-spoke status, and centering guidance.

New to the terms? Glossary → · Wheelbuilding fundamentals →

Tensiometer

Spoke model — auto-picks the profile

SpokeSpoke count

Reference (tight) side

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Right target kgf (tight)Left % of ref (dish)

Left · NDStgt 110

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Right · drivetgt 110

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Park Tool TM-1

parktool.com TM-1 conversion table PDF · rev 2024

Also fits: ZTTO TC-1 / TC-1L

Official PDF ↗

Conversion table · Steel round 1.4 mm (dial reading 8–20)

dial reading	kgf	N
8	54	530
9	58	569
10	63	618
11	69	677
12	75	735
13	83	814
14	91	892
15	100	981
16	111	1089
17	123	1206
18	137	1344
19	154	1510
20	172	1687

Linear interpolation between points · readings outside 8–20 are not extrapolated.

Estimates — devices drift, brands differ. Cap the reference (tight) side at the rim maker's limit. Symmetric wheel → other side 100%. Dished wheel → set the other side below 100% (≈55% road rear) or an absolute kgf, so each side judges against its real target. Reference side = the higher-tension side (drive on a rear, rotor side on a disc front).

Dish gauge (alignment / WAG)

Flip gap (mm)

Rim leans toward

3 cm = 30 mm. "Leans toward" = the side the rim sits closer to (usually the tighter side).

bars = spoke tension vs side target · band ±20%

left/NDSright/drivein bandloosetight