![]() ![]() The flex stays do effect the kinematics, but they aren't gonna cause any more side loading than the Evo. The Evo and the SJ use an almost identical linkage, really the only difference is the use of a flex stay rather than a horst pivot by the dropout. This is not unique to a specific model, nor just specialized: The side loading issue is a result of the extended yoke mount that connects to the rear shock eyelet. The SJ applies different loads to the shock structure due to the nature of the flex stay pivot system. The Evo comes stock with a coil on some models so it's definitely ok. I would think a SDU air or Float X with the proper tune would improve performance significantly without as much added weight. Also IMO the SJ's suspension kinematics are somewhat compromised for weight savings (flexstay), so adding significant weight to try and make up for that doesn't make sense to me. That said I wouldn't run that shock/spring with the clearance shown in the photo. I wonder if that applies for the new beefed up RS coils? The press/review units were pictured mounted to SJ Evos, and I doubt the side loading is any worse on the regular SJ vs Evo Only EXT makes a coil shock that's strong enough to handle the torsional stress that the SJ creates. So actually Specialized says that you can't run a coil rear shock because of the angle of force created by the linkage puts too much stress on the coil shaft and causes them to break prematurely. And it is pretty heavy with the 600 lbs spring. ![]() The coil clears the side arm with about 2-3 mm but it increases under sag. ![]() I had to remove the shock link and the seat stay bolts to install. The downside is that it was really tight to fit. I still need to ride some steep downhill with it but I am confident i won’t get disappointed. It was great so far for flat single trail and jumps. Besides that it is super sensitive and gives a lot of support. It is what was bothering me most with air shocks. I went for a ride today and noticed immediately that it has less/almost no bob while pedaling. Just have put a RS Super Deluxe coil on my Stumpjumper. ![]()
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