Formula Rear Shock Spring

The Formula shock spring is a replacement part for riders who want to adjust the stiffness of their bike's rear suspension. It comes in two lengths, 55 mm and 65 mm, with various spring rates in lbs and two colours.

• Two sizes available: 55 mm and 65 mm
• Spring rates from 300 to 600 lbs, with various intermediate options
• Two colours to choose from: grey and purple

Technical specifications

• Brand: Formula
• Product type: Shock spring
• Available sizes: 55 mm, 65 mm
• Available spring rates: 300, 400, 450, 500, 550, 600 lbs
• Colours: Grey, Purple

Formula was founded in Prato in 1987 by Andrea Becocci and his wife Daniela, and remains based there. It makes brakes, suspension and wheels for mountain bikers, bringing its motorcycle experience to the trails. In 1993 it introduced Standard, a hydraulic disc brake designed specifically for mountain biking.