The Vitus Rapide FS CRX seems to come second(after the Epic Pro) in:
Best cross-country mountain bikes 2023 - https://www.bikeradar.com/advice/buyers-guides/best-cross-country-bikes/ 

I saw that but also feel BR is a partner with Chain Reaction Cycles and aren’t 100% isolated in their reviews.

Anyone ask about a rear triangle with UDH so we can run the new Sram stuff?

It seems that you, like nearly the whole xc crowd, have a huge misunderstanding of correct sag values. 20% of sag means that in theoretical case of totally linear spring (which is of course not so for an air shock) and zero friction between seals you need 5G to achieve full travel. And in real case this force should be even higher. Are you going to do some road gaps or maybe are you going to take some lines on Rampage for getting such G-outs?

I hear what you are saying and have come to accept 35% sag with my current setup. But, my point with the high compression tune is that I could run lower pressure while having 25% sag. In theory I’m hoping this would give me more active suspension with a better pedal platform.

The funny thing, my buddy with a Hightower won’t run his suspension at 35%. He’s convinced the manufacturer optimized the bike for 25% sag.

Regarding terrain, there are a few spots at my local where too much speed can result in missing the landing zone. I haven’t bottomed out yet…

I have the tune kit. I will install and report back.

Regarding the sag issues on the SID Luxe. There are a lot of assumptions on my part; I am trying to figure this issue out so please correct me if I have anything wrong! The big uncertainty for me is how to understand the impact of the negative spring.

I have taken measurements on a few shocks that I have access to in order to try and compare the area of the piston. I figure this should be proportional to the force the shock produces at a given pressure - but I might be mistaken. I have measured from the outer diameter of the piston seal minus the diameter of the central shaft. For the uncompressed shock, this should mean that to produce the same force as a SID Luxe at its maximum pressure of 330 PSI, a fox DPS would need 290 PSI (max 350) and a RockShox Super Deluxe 230 PSI.

To me this suggests that the SIDLuxe is probably just a bit weedy for the suspension design of the FM936 and taller/heavier riders. It suggests that a fox DPS should be suitable; it should produce ~20% more force at max pressure. I need to work out the impact on equivalent sag at max pressure (taking my current 30-35% for the SID Luxe as a starting point). However, I will probably get a RS Deluxe Nude; I think these are the same basic air can as the deluxe so should have more margin than the DPS and are also one of the cheaper shocks that I have found in 165x40 mm that is remote compatible.

Se my post above. If you are running the 40mm stroke the equation could be 115/40 or 100/40.

This frame needs a High Compression tune.

Thanks for the replies.

I checked the pressure with my other pump and got pretty much the same pressure. I have used the pumps on another bike and got pretty much bang on the manufacturer's predicted numbers so I don't think they are massively innacurate.

It is interesting that someone else with a SID Luxe has the same issue. It is a physically small shock so I wonder if it produces less force for the same pressure than the others that have been mentioned (smaller area for the pressure to act on?). I don't know if there is a way of finding out this information for different shocks?

I have the same issue but described differently. The SidLuxe Ultimate I have is a M M tune. I want to try a High compression tune.

It’s not a hard service. I posted the links in an earlier thread. Parts were sold out in the Spring but are $18 if you can find them.

Shifting issues. Transmission or frame/hanger?

Had my FM936 built up for a few months now, 500miles and enjoyed it for the most part aside from one, rather major grumble.

Since day one I've not been able to get the gears shifting correctly.

Transmission is 12speed XT (cassette, mech, shifter, chain, optislick inner cable that I then upgraded to the polymer, SP41 outer cable).Yes, cable routed correctly. It's always a little out and as 12speed sprockets and chains are so narrow a little out is almost intolerable. It alters during the ride, i.e 1-2-3 good a start of ride but then not good by the end (even if an easy ride so haven't hit it on a rock, etc). It alters depending on the suspension setting (have a nude shock with 3 settings). It alters during suspension compression. It's never quite right.

I wonder if the clutch on the mech is partially to blame for a number of reasons. Firstly, I know the clutch affects shifting, increasing friction at the shifter and think it alters, ever so slightly where the mech rests after a shift, which if true means that because of suspension movement and chain growth the clutch is constantly 'working' and so minutely affecting where the mech sits and given how minute adjustments affect shifting it must be having an impact.

But also wonder if the clutch is actually causing the hanger to bend - as I say when the suspension is compressing causing chain growth it's effectively pulling at the clutch, and so mech, and so mech hanger all the time - it must be having an impact - which is kind of confirmed that when I check the hanger alignment with the tool it's always ever so slight out - is it plausible? Maybe the hangers on these fm936 are a little soft?

I've serviced the clutch, and backed off the tension as much as I dare and it is better but I just dont like the fact I feel like I'm having to compromise on a nice bike!

Like the idea of 1x12 but just seems to sensitive or is it the hanger/frame? - bring back 2 x 10 I say 

Any thoughts appreciated.

Derailleur hanger - you know this is the culprit when the shifting degrades in only the middle cogs. If it shifts fine at the ends of cassette, but skips or clunks or is reluctant to shift in the middle three cogs, then it’s likely your hanger.

If it happens all the time, in every gear, and is triggered by the suspension then it’s likely not the hanger. Start by disconnecting the shift cable and setting your limit with the cable disconnected. Go ride the street. There shouldn’t be any clunks or anything no matter what you try to do.

Then, screw the barrel adjust all the way in, back into two full turns. Connect the derailleur cable. Increase tension or decrease tension until you get a smooth shift from smallest cog to second smallest. Listen to the sound. Play with the tension until the noise from the chain is reduced.

Then, work up the cassette and check your upper limit.

If you still have problems then there is something wrong with your cable routing or derailleur or cassette.

Of note, the trunnion eyelet with remote is starting to trickle out.

I am not sure if this is right eyelet…but I believe the same eyelet for the SidLuxe works for the DeLuxe.

Thanks, I have read a lot of the thread, and wasn't sure what the final conclusion was on max stroke.

It really seems that there are too many shock options from Fox and Rockshox, and then you add in tunes ... just too many to choose from.

It was said at least that a 40/42.5/45 fox are the same, just with different sag markings and spacers. I'd probably go 165x40, but just unsure of all the models and then the tunes. And if paying say $480 for the DPS performance, and then sending to fox for a tune, that really starts to get up there in price. So maybe the RS Nude off the Scott is closer, but then I see the SID with more adjustments ... can more user adjustable settings overcome a factory tune which doesn't suit the bike/trails/rider?

Hopefully someone has done lots of research and can break it down for me in the the options are 1) Fox DPS XXXX tune, 2) RS nude, 3) x-fusion yyy sort of thing.

I have the SidLuxe 42.5 in a M M tune and will send it in to be converted to a H M tune. It needs to be High compression and Medium damping.

I have to run it at 280psi to get 20% sag. This high of a psi prevents the shock from getting all 42.5mm of stroke.

Just upgraded wheels and fork. Switched to a 120mm fork and no more pedal strikes.