When I first started racing down hill mountain bikes, I remember reading through bike magazines and lusting after titanium shock springs. They were beautiful, they were light, they were… outrageously expensive. Especially if you needed to change up your shock tune and go to a heavier or lighter spring. The price is probably the main reason that titanium springs remained a factory option or one for the well-heeled privateer.
These days though, there’s a new spring on the block. Instead of pricey titanium, a number of manufacturers have utilized a new lightweight class of steel spring. Many of them, including the EXT Super Alloy Racing Spring from EXT Racing Shox promise titanium spring weight – at 1/3rd of the price. Now, EXT has expanded their range to fit almost any mountain bike shock, providing another option to drop a few grams…
Designed to fit with popular brands of shocks including RockShox, Fox Racing Shox, Öhlins, Cane Creek, Marzocchi, BOS, DVO, and X-Fusion, the springs are available from 225lb to 600 lb versions in 25 lb increments. EXT Racing Shox claims these are the lightest weight steel springs available, but the Cane Creek Valt springs seem like they might upset that claim, though we can’t confirm since Cane Creek doesn’t offer individual weights. Priced at €98-115 with the adapter running another €10, they’re certainly less than most titanium springs.
- Super Alloy Spring (proprietary super-light design)
- Extreme Linear Ratio
- Hard Epoxy Coating
- Internal Diameter: Ø38.5 mm
- Length: 105 – 110 – 140 – 175 mm
- Stroke: from 50mm to 89mm
- The lightest* steel springs on the market *claimed
- Developed in our motor sport racing programs
- First dedicated to fine tuning with 25lbs increments
- Today used by the fastest Pro Rider in DH and Enduro
- Adaptable for all type of shocks in the market
- Life duration: over 500.000 cycles