Description
Brand new replacement springs for EXT Arma MX shocks.
High performance 90mm(3.5") max stroke MX Spring
– Super Alloy Spring (proprietary super light design)
– Highly Linear Ratio
– Hard Epoxy Coating
– Internal Diameter: Ø38.5 mm
– The lightest steel springs on the market
– Developed in our automotive racing programs
– 50lb increments; C90-450/C90-500/C90-550/C90-600
– Adaptable for all type of dampers in the market
– Life duration: over 500.000 cycles
Spring Rate Suggestions
The advanced tuning available on this shock allows a high degree of adjustment and tuning for the rider to dial in exactly how you want this shock to perform, from ultra-plush to ultra-stiff to anything in-between. Please see the recommended settings at the bottom of this page.
| Rider Weight | Spring | Extended Swingarm |
| <150 | 400 | 450 |
| 150-170 | 450 | 500 |
| 170-195 | 500 | 550 |
| 195-220 | 550 | 600 |
| 220-250 | 600 | 650 |
| 250+ | 650 |
* This chart is perfect for trail riders and for those wanting plush suspension that utilizes full travel. If you want a stiffer rear end and/or jump large jumps (MX track, dirt jumps, etc), go one size heavier than the chart suggests.