As I am a big bloke, I have to run high air spring pressure to get the required sag, my fork though capable, doesn't have any of the whistles and bells of the higher spec'd forks in the Fox 38 range, using a higher spring pressure results in very little small bump compliance, this is what I miss the most as I don't tend to throw my bike off anything higher than 30cm.
I'd seen some positive (though not a lot recently) reviews of the Trutune insert, and for the money, a lot cheaper thank potentially changing my forks.
I ordered one and fitted it straight away, using Trutune's setup advice, retaining the already installed token and increasing the pressure by 15% to get the required sag.
I can only say, what a difference! really compliant off the bottom and better mid-range, I will probably remove the original token as I'm not a particularly hard rider and the forks are nowhere near full travel.
Money well spent!
Rides higher, creates grip, easy to install, turned a basic Domain into a much better fork on my ebike. Confidence inspiring. I'm clearings drops and jumps with added height I think due to the way the TruTune Flow makes you ride higher in the suspension. This thing is REALLY good.

I tried it just because I was curious, and I liked it since the first descent. I followed the instructions, so no bottomless token and only the Trutune for a XC/DC use, a little bit more air pressure and the job’s done. Feels super nice on small bumps as well as bigger rocks, and the red ring on the fork speaks clearly about how much more travel is used (at least 8 mm). I’m very happy at tue moment, and hope it’s going to last a lot.
I believe that think should work even if you don’t believe in it , it’s work , it’s make great upgrades to the fork
This thing works so good! Best upgrade for your fork! Wish I bought it sooner.
I was able to demo a friend’s for a couple of ride’s and it was an eye-opener, night & day difference. I ordered one asap for myself & upon arrival, I immediately installed. Now, I’m awaiting the current trail conditions (Winter) to improve before initial shake down…can’t wait. Keep up the beyond great work you guys do!
-R in CO
So I felt I was not getting enough support mid stroke , I was already running one token so added another and felt two was to harsh and suffered a loss of grip up front.
So trutune looked to be the answer and I pleased to say so far it's working as expected great small bump sensitivity and great mid travel support grip was improved as well.
So I'd say a great product that does what it says . Best advise I would give if you are thinking of getting a trutune is to properly understand what it does so you feel disappointed. I knew what was wrong with my set up and researched alot of products.
Grip increased by 10% i would say and fork support 25% increase which in my eyes is a great improvement.
Added this to a set of Fox34 Step cast forks. I’m 72Kg. They have been great since. I’ve been able to add at least 10 psi and get full travel. I’m now at 75psi and zero tokens and the forks are really plush.
Great product for the price. Ordered two, one for my Lyric, and the second for my Zeb. I ordered the one for my Lyric (160) for better small bump and mid stroke support. I ordered the second for my Zeb (180) to get full travel and better small bump compliance. The product achieved each of my goals tor my different forks. Still playing with air pressure and tokens but that is a personal problem.
I have found the flow definitely makes a difference using more travel when needed and less tokens required. HSC pre flow I’m -1 to -2 I’m now central on 0. Again LSC pre flow I was more or less fully open on the -, now I’m more to -5 clicks. Rebound I’ve been generally 1 click slower though faster riding I’m back where I was before which is 7-8 clicks from full slow.
I bought this for my new 180mm ebike. I’m a 6’2” tall and 125kg full riding gear. Running high pressures usually means a harsh ride or tokens and lower pressure but can lose some mid stroke support especially on the steep stuff. Trutune allows me to have great support but also use all of my travel (180mm) when needed!
I installed one of these to my 100mm Rockshox sid 35’s and it’s transformed them, I now get full travel and the small bump control is a night and day difference. I’ve got a second bike with 100mm Sid 32’s that has the standard tokens in and it’s crap compared to my 35’s now so I’ve ordered one for that as well….. I’ll leave another review when it arrives.
My Fox 32SC was the worst fork ever made.
Installing a Trutune made it into a great fork. The fork became plush with good holdup, progressive and compliant with good bottoming resistance.
I was sceptical, but this has completely fixed my harsh zebs. Previously I could never get full travel, and my forks always felt harsh and terrible. Now with the trutune thingo installed, my forks are plusher, have plenty of midstroke support and I'm getting at least an extra inch or so of travel. I'd highly recommend to anyone who feels like their fork is ramping up to hard. Best upgrade I've made in years.
Tru Tune Flow has made my Rock Shox fork much more plush & I now use most of the travel
Installation straight forward and did notice that had to inflate forks about 10psi more to get same sag.was hoping to do back to back.tests at FOD but weather had other ideas.Tried at BPW but left it in all day because again weather dire.
I did notice the fork felt more damped but also a little dead so had to decrease rebound.I think I can improve it’s performance but my local trail are not rough enough to really test it so that’s why I have only given it 3 stars.
I purchased the shorter model as was advised it was only one for Fox 38 although other suspension outlets are selling both as suitable with the longer one more suited to less aggressive riders which is me.
There is a change in fork feel but only time will tell if it’s worth the out lay.
Ride more preasure one click more low and high speed compression the feeling is softer and i can go faster
I bought this after listening to the downtime podcast, I was interested in taking out the trail chatter which it does, but the most impressive part is how it handles bigger drops!

I consistently use almost all of my travel now but still haven’t bottomed out my fork (lyrik). I only do drops up to about 4 feet though.
On the climbs I take the compression all the way off and the fork is insanely compliant over small to medium bumps and is a huge advantage on steep hard technical climbs.
Descending I crank the compression back about 2/3rds of the way up and it’s pure butter.
Works better than I ever imagined so I put one on my wife’s bike and she now is almost using all of her travel too (despite being an intermediate rider who doesn’t go that fast)
Awesome product, completely changes the feeling of the forks! Now running much higher pressure in my 38’s yet still feels way plusher through everything from techy downhill to big jump hits.
From reading the reviews & information, the Trutune cartridge sounds like a contradiction to physics - you put something that takes up more space into the fork and it has the effect of increasing the volume! I checked the compression ratio before & after fitting using a Shokwiz, & it does! It makes the fork noticeably plusher in the early travel, not quite coil like, but close. Impressed. Fitted one to my Pikes too.