The XT of Syncro literally stands for extra tough, indicating that this exceptional monofilament is highly abrasion resistant and durable.
The breaking strain quoted on each spool is an easily achievable knot strength, appropriate to its diameter. However, with carefully tied, mechanically superior knots like the five turn grinner, average breaking strains can be significantly increased as indicated below.
10lb (possible 15lb), diameter 0.30mm
12lb (possible 17.5lb), diameter 0.33mm
15lb (possible 21lb), diameter 0.37mm
18lb (possible 26lb), diameter 0.40mm