Xray XB9 Progressive Springs
These are new progressive springs from Xray that are soft at the beginning of the compression, but become harder as the spring is compressed. Marked for easy identification, they come as a set of two and fit both the front and rear. These can be fitted to the XB808 and XB9 models.
#358275 Xray Progressive Springs – Soft (one stripe)
#358276 Xray Progressive Springs – Soft/Medium (two stripes)
#358277 Xray Progressive Springs – Medium (three stripes)
Source: Team Xray