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Nerd Alert! Inside the Fox/Trek/Penske Re:Aktiv DRCV shock!
After the response to our last video, we decided to tackle the Trek-only Fox Float CTD DRCV Re:Aktiv shock, a unit developed by a collaboration between Fox, Trek and Penske's acronym departments (oh and their engineers). In here, we discuss the function of the regressive valve inside the Re:Aktiv damper, the way the DRCV spring system works, and some more discussion of air springs including how our own Corset air sleeves work.
Warning: some serious suspension nerdery in here, and it's 30 minutes long.
Questions? Corrections? Marriage proposals? Fire away in the comments!
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Member since Jul 13, 2013
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5 Comments
- 1 0
way2manyhobbies2keep
(Jun 22, 2016 at 13:50)
i watched this, I enjoyed learning it, but because its proprietary I just cannot find the same level of fascination, because this shock is connected to a bike and we cannot try it on different bikes to see its performance on different suspension layouts.
- 1 0
eric-t-rudd
(Oct 28, 2016 at 22:07)
funny that he says the sb-66 gets over-slacked by the corset. I did notice at first that the bike felt different at 30% sag, because i never ran that much sag with the stock float ctd. I had to nose-down the saddle a lot more to get it riding at the stock angle, but i still run my saddle backwards at the max range (and wish the rails had a tiny more length). Lots of newer bikes that have steeper seat tube angles don't pedal as intuitively in my opinion. Also the top tube numbers are deceptive for sizing because the seat is further forward and thus the reach is shorter. If you commute on road bikes year round and get used to your cleats-saddle-crank relations, and started mtb by trying to pedal single speed hardtails fast for a few years, you might feel like I do. I guess if you run your cleats way back to mid-foot it would compensate. The upper body posture you need to climb steep stuff is up to you to learn... not up to the seat tube angle to dump you in to. If you are standing up with the dropper down, then it doesn't matter what your angle is....might as well have a seat postion that lets you sit and hammer when you want. I guess the only advantage is less wear on your dropper post stanchions because the bushings aren't scraping it diagonally (as much). Long story short I'm 5'11 and when my sb-66 finally breaks I'll be sad that full suss bikes dont have 72 degree (slacked a little with 30% corset sag) seat tube angles anymore.
- 1 0
VorsprungSuspension
(Oct 28, 2016 at 23:22)
Hi Eric, we're stoked that you like the Corset on your SB66. We tested it on that bike quite a bit, and found that it worked really well on everything except particularly steep climbs (which happens to be about 95% of climbs in Whistler, where we're based), which is where a steeper seat tube would have been nice especially for me at 6'2" with a long inseam. I think our perceptions of the necessary steepness/slackness are coloured by the terrain we ride in, because if we were based somewhere that climbing wasn't so brutally steep, I don't think it would have been any bother.
- 1 0
mrfish
(Aug 5, 2016 at 3:09)
Loving the level of tech you guys are covering. Keep up the good work.
- 1 0
sbrdude1
(Jun 15, 2016 at 10:12)
Great review!
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