These are tempered steel springs made by Core. This is a dual stage spring, which means the coils get farther and close together in different parts of the spring. This is the way all aftermarket springs are while stock springs are constant rate. It changes how much force the spring applies at different points in the stroke. This is a SP rated spring so the velocity should be a bit higher than a given M rated spring, however Core has recently reduced the wire gauge slightly so these may be closer to M ratings, you can use the wire size to judge the comparable output. This spring is also fairly short (see length below)
Features:
- .057" (1.44mm) wire diameter
- Length: ~5.4 in long
- Material: Tempered Steel
This product was added to our catalog on Monday 10 December, 2012.
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