Specialized has just issued a recall for its Roubaix, Ruby, Diverge, and Sirrus models due to an issue with the clamping steerer tube collars on the Future Shock.

The Future Shock, if you need reminding, is a spring inside a cartridge located between the stem and head tube. It was introduced on the redesigned Roubaix a couple of years ago and delivers impressive ride comfort and smoothness. We were so impressed we gave it our Endurance and Sportive Bike of the Year award last year.

To be clear, the issue isn't with the Future Shock itself. It's the clamping collar around the top of the stubby steerer tube which is used for preloading the headset bearings that appears to be the cause of the issue.

Specialized says it the voluntary recall is due to “stress corrosion cracking” with the collar that clamps around the top of the steerer tube. It has designed a new and improved collar which, together with an adjustment to the torque setting, will significantly improve the collar’s resistance to stress corrosion cracking.

Specialized has produced a list of bikes affected by this issue and urges anyone with a bike to stop riding it immediately and return it to the bike shop for a new collar to be fitted.

Here’s the full statement from Specialized.