[Sonne]

tftune, например.
"Fox mark springs by quoting the maximum travel the
spring will go to before it becomes coil-bound.
e.g. 1.65 = 1.5" stroke, 2.35 or 2.38 = 2.0" or 2.25" stroke,
2.8 = 2.5" or 2.75" stroke & 3.25 = 3.00" stroke.
BOS mark their springs by quoting the free length
e.g. 140 = 2.5" or 2.75" stroke, 160 = 3.0" stroke & 180 = 3.5" stroke"

Перевести труда не составит. Правда,
с грамматикой у них косяки.