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. These are also long or normal length springs.
Features:
- .062" (1.69mm) wire diameter
- Length: ~6.875 in long
- Material: Tempered Steel
UASR rating: 7.23DR
Spring rate (6kg test): 1401N/m
Spring length: 176mm
More information on UASR ratings here and here.
This product was added to our catalog on Monday 10 December, 2012.
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