It may be a slight improvement over the tiny stock CR bumper, but the DHX bumper will not be as effective unless you have the proper plate for it (like the avalanche one) where it is captured and will not just squish flat.
You would need the spring perch and rod end from a DHX to make it work..and the damper shaft...and then the piston and rebound rod would not work.

Best bet is get the Avalanche Racing bottom out bumper kit.

 

He doesn't sell those individually, does he?

 

Yeah, they do. $55 for the kit w/ bumper.

http://www.avalanchedownhillracing.com/Fox DHX/Fox Vanrc SSD Mods.htm

 

where do you guys get fricking dhx/float x end cap on your bomber cr ? Fox has been out of stock close to a year on that part ( 813-00-290)....driving me mad

 

From the shock boneyard.

 

@ARider have you had the chance to ride your shock with the Fluid Focus piston and shim stack?

 

I actually just had my first and very mellow ride on a Fluid Focus tuned Bomber CR and came away very impressed. Shock is on a Canfield Lithium and I asked them to make it more lively and to ignore pedal performance and they really delivered. Again only one XC ride on a big bike, but I can’t wait to try it on gnarlier terrain (bear in mind I’ve had Bomber CRs from Avy and Shockcraft as well)

 

NIce te hear. I just installed the tune on mine. I have a Rocky Mountain Altitude 2021. I'll be able to test it out properly in about a month.

 

I actually just got back on my maiden ride on the ShockCraft tuned Bomber CR for my Turbo Levo - incredible! Dougal put in his new piston and tuned it perfectly. I had been running the shock with a 550 lbs spring, but Dougal recommended a 525 with his tune. After mounting it and a parking lot test, I was skeptical - seemed heavily damped, but thankfully, it was flawless on the trail. Stuff I used to bottom out hard with the 550 lbs spring I now was not on the 525. It felt super composed, and didn't get hung up in fast chunder. Seems like you can't go wrong with FF & Shockcraft for these shocks!

 

how much was the shockcraft bomber all said and done? When it first came out it was pretty expensive to get it to the states

 

Any direct comparisons between the Fluid Focus and Shockcraft bomber? Would be very interested if there were any.

 

Given the very simple architecture of these shocks I'm going to take a guess that most of these mods, including Avy's, are more alike than not. The real difference is going to be nailing your spring rate and communicating with the tuner to make sure their philosophy/work aligns with the tune you like. If you know what you want, tuners should adjust it for you. If you don't know what you want then it can be more about a bit of luck or back and forth for a bit as they get to know you. So I'd pick the person you most want to work with and give it a shot!!

Edit, I ride an Avy bomber that I've come to really appreciate.

 

I can confirm it is not modified in any capacity.

 

@rpsteiger It has been a slow start to spring around here, but the trails are finally clear and I have a fun little project in the works. 3 shocks, one bike, one sub 2min (mostly) DH track, and a chip timing system.

The Shocks:
-Bomber CR tuned by Avalanche Racing
-Bomber CR with Fluid Focus MV piston and shim stack tunes (self install)
-Vorsprung Telum

The shocks are all tuned for a Specialized Enduro. First timed run tests on the Telum tomorrow morning.

 

Could you still give impressions of what the shock does or doesn't do for you? I guess you are running the stock bottom out bumper, right?

 

Yes I can, if I remember. I only have done two rides so far, both in very wet conditions so I cannot reach my normal speed. Plus I need to figure out the correct spring first. But so far it feels good and responsive, I was afraid that I'd need to do a couple of rebuilds to find correct shim stacks for comp and rebound, but looks like I got them pretty good on a first try. Oh yeah I went with the stock bumper.

 

I'll give a small review of both FF & Avalanche Bomber CR builds following the timed testing.

Both of these shocks use the Avalanche Racing captured bottom out bumper system and spring perches to run the larger ID spring. Currently using 475# SAR spring.

The stock Bomber CR bottom out bumper is pretty minimal.

 

Is this you?: Coil Shock Shootout

 

 

Some thoughts on the Fluid Focus Bomber CR build;

1) Tons of LSC adjustment range. I got into a bad spot just "twisting dials" and not thinking enough so went back to some good old bracketing.
With LSC at -2 the compression damping was crazy. It "felt" OK, sagged fine, climbed fine, but when descending and trying to dip and lean the bike into a berm it refused to lay down. It was like someone was holding the bike vertical, so much LSC damping.
Ended up at LSC -9 (of 20 clicks), so pretty much in the middle and it's good.

2) It really comes alive at speed, the faster and rougher the trail the better it feels.

3) There is a slight top out, like Ohlins coil shocks. Not a huge problem, but still somewhat annoying and odd considering the shock has a hydraulic top out feature. The new piston just flows so much oil!
It is a potential know issue and FF has notes about it when tuning, basically keep adding face shims to the rebound stack until it goes away. I re-shimmed it once, and it helped, but need to try again and see if it can be eliminated completely.

Current setup:
475# SAR spring (minimal preload)
Reb -8 (of 15)
LSC -9 (of 20)

 

Has anyone here tried a titanium coil from Renton?

RCS HOME

Renton Coil Spring Co. is a world-class spring manufacturer for the aerospace, military, commercial, and motorsports markets.

www.rentoncoilspring.com

 

Are you guys shocks silent when bleed properly? I use a serynge with the proper adapter. It's slightly squelching on the rebound, but not at all on the compression. All the adjuster are working properly.

I have the Fluid Focus tune and the guy says to pump it to 150 psi.

 

Both FF and Avalanche Racing CR tunes can have more rebound noise than stock, especially Avalanche (depending on specific tune).

I think you are good. If there was air in the system, you should hear/feel it on compression as well.
Does the sound change when you adjust the rebound clicker?

 

There is less sound the more I close rebound and the shaft speed has to be pretty high for the squelching to happen. It doesnt happen in the first half inch of travel. There is a seal on my serynge that isnt totally air tight. I have to avoid pulling a negative pressure as I bleed the shock.

My local enduro bike park should open in about 2 weeks. I can't wait to test the FF tune.

 

I opened my shock up and the wave spring was indeed broken. I replaced it with a plastic ring sold to me by S4 Suspension.

View attachment 2094626

This really looks like a 3D print, is it soft?
Maybe I will make some from TPU once I get my Bomber CR open for measurements.

I used an o-ring in place of wave spring, works fine.

What size did you use and has it been holding?
How many clicks towards closed is your LsC?

 

Hey guys, Long time first time.

Love this shock, I'm a set and forget type guy and value for money you cant go past the CR, its light and has great upgrades/Mods you can do.

Recently i broke my bomber cr, bent the eyelet at the bottom of the shaft, This was my fault, mounting it the "Cool" incorrect way on my Norco range vlt, I had swapped this over from my enduro meta sx which doesn't do much now i have a ebike.

I noticed on avalanche suspension a small bracketed 230 x 75 shock mod, this always stuck with me and with wanting a park/shuttle bike, but not really wanting to spend the money for a dh, Doing the numbers it would give my meta sx roughy 192mm of rear travel, and make it the perfect shuttle/park bike which it pretty much is anyway.

So with a bit of the classic YOLO, I decided to figure it out, there is no made science about it, just some math.

I'll save the long story, you basically can use a 210 shock body with a 75mm shaft, this will give you a 230 x 75mm shock, or the way i have done it (and only because it was the cheapest 2nd hand pretty much brand new, close enough option) and to see if i wasn't crazy, a 225 x 75mm trunnion DH, This body was only 1.4mm longer over the 210 body.

With the help from a friend all we did was, just swap the shock eyelet body I.E the top part, i was able to convert it to a 231.4 x 75mm shock. close enough for me, and with having a flip chip, i just put it in low.

How did i figure it out ? I found the shock body's on silverfish, they had the measurements of each body. So even though i haven't done the 210 body 75mm shaft, but i would assume it will be safe.

How dose it feel? Feels great, i can run a lighter spring which will help make it feel more plush.

Next i want to get the fluid focus piston and see how much that will improves the shock.

Thanks

 

Nice.
Mine is a similar size stroke. Surprisingly easy to do

 

Anyone running a Bomber CR bone stock with a spring in the 400-450# range? Any recs on settings? I started very light on both compression and rebound but I want more support. Being able to add compression and support without a ton of harshness on my ABS+ Mattoc is addictive and I want to achieve something similar on the rear, but I realize that's going to take a custom tune (thinking Avalanche). FWIW I have no problems with how my bike climbs and I'm not trying to address anything climbing related with my tuning.
For now, anyone have feedback about how much compression can you run without getting a lot of spiking? Still messing with it but I'm curious what you guys have to say. I asked ChatGPT to summarize info from this thread and around the internet (I did specifically prompt it to give me info from this thread). It used the work "notchy" which I think may be AI getting confused by the well known Belleville spring valve failure inside the damper that causes notchiness.

🧠 Key user observations:

1. Turning in LSC made the shock feel harsh on impacts
   • A few riders specifically noted that even moderate increases in LSC made the shock feel “harsh” or “notchy” on high-speed compressions—suggesting LSC and HSC aren’t entirely isolated in this damper.
2. Comments implied valve coupling
   • Though not everyone used technical terms, some suspected that “the LSC adjuster is influencing more than it should,” or that it “chokes the whole flow path,” especially on sharper hits.
3. One user described a ‘spike’ effect
   • They noted that going beyond 3–4 clicks of LSC created a feeling of sudden harshness—typical of HSC force ramping up too early.

 

Anyone running a Bomber CR bone stock with a spring in the 400-450# range? Any recs on settings? I started very light on both compression and rebound but I want more support. Being able to add compression and support without a ton of harshness on my ABS+ Mattoc is addictive and I want to achieve something similar on the rear, but I realize that's going to take a custom tune (thinking Avalanche). FWIW I have no problems with how my bike climbs and I'm not trying to address anything climbing related with my tuning.
For now, anyone have feedback about how much compression can you run without getting a lot of spiking? Still messing with it but I'm curious what you guys have to say. I asked ChatGPT to summarize info from this thread and around the internet (I did specifically prompt it to give me info from this thread). It used the work "notchy" which I think may be AI getting confused by the well known Belleville spring valve failure inside the damper that causes notchiness.

My Banshee Titan v3.2 is unfortunate enoughto be fitted with a stock Bomber CR at the moment, with a 450lbs spring. I'm running it with LSC completely open. Anything else is just more harsh and makes more clunk. I'm going to replace this piece of junk with an X-Fusion H3C as soon as my LBS get more of them in stock. It's cheaper, lighter, and WAY better.

 

This is the second Bomber CR I've seen break in the same place. Shocks were both mounted properly in respective frames. Spring weights were correct for riders. Neither failure occurred on unusually huge landings (or so I was told). One frame had very stiff (but still movable) linkage pivots. Anyone else had similar failures?

 

The most important question is which bike this is?

 

I’ve had good luck with my stock bomber.
I have the rebound fairly fast and some LSC

I thought it was going to be a lot worse when I initially got it. But after finding a spring and the settings I liked, I haven’t felt the need to send it out yet. When it’s time for a rebuild, it will go to avalanche for a custom tune to see the difference.

 

That's dependent on what version of the Meta frames we are talking about. Some of the earlier ones used yokes which can stress the shock in less than ideal way. For example, Rock Shox states that only Super Deluxe Coil shocks with steel shafts can be used on Meta Power TR frames.

 

The alloy damper shaft on the Bomber CR does not fair well with clevis mount bikes. Specialized specced the Bomber CR stock on a SJ EVO at one point and a large number of them broke the damper shaft due to side loading with the long clevis extension.

I believe this is what actually prompted Fox to release the "coil compatible" frame list. Specialized simply sent all customers with broken shocks to Fox saying it was their problem, when the frame was the issue.

The Bomber CR is a great platform, but the alloy damper shaft does not get along with certain frame designs. This is also why Avalanche Racing offers parts to swap in a steel damper shaft like what is found on the Fox DHX shock.

The V2 Rune seems like it could be prone to side loading the shock as well.

 

Did you try both the Ava and Fluid Focus mods in this shock at one point? I seem to remember a thread where you were comparing shocks but I can't remember if that's what you were doing.