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Flow

MTB Air Fork Upgrade

£120.00

Plug and play insert for mountain bike air forks, powered by activated carbon.

Better small bump compliance, increased mid-stroke support and end stroke absorption. Reduces fatigue, improves grip and comfort, and unlocks more travel. Experience a coil-like feel without the weight penalty and with the tunability of air.
 
Heavy rider (90+kg) or on E-bike? Choose our Short model where available.

    🔧  Support with setup

    📦  Free UK Delivery

    🤙  Money back guarantee*

    🌍  Free International Delivery for orders of 2 or more

Model
Compatibility
    RockShox ZEB, Pike, Boxxer, Lyrik, Yari (DebonAir 35/38mm):
    Equivalent to GREY/RED Bottomless Tokens.
    For SID 120mm choose the Short variant.
    Not compatible with Dual Position Air.
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Token length
    4
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Processing time 1-3 days, but can be longer if items are out of stock. Please get in touch for up-to-date availability.

IMPORTANT: Taxes and duties for orders outside UK are charged at checkout.

compliance without compromise

Plug-and-play

Installs simply, just like a volume spacer. Release all pressure, remove the top cap, clip on or thread on the insert, and charge to our recommended pressure.

Rockshox-08.jpg__PID:ae27117e-1245-4e41-9dcc-121f9d8ddbaf

plush

Smooth and comfortable feeling through the whole travel, reducing arm pump and fatigue and providing improved grip.

Provides a consistent stiffness, similar to a coil spring. This allows running higher pressure for exceptional support without running into harshness, or keeping pressure the same to unlock more travel.

Force_curve_vs_tokens.jpg__PID:bba5dda5-358a-45df-b319-454d20305e4c

predictable

Reduces speed sensitivity inherent in air springs, meaning the fork feels more predictable and does not stiffen up with faster movements. This is critical to reducing chatter and improving end stroke absorption.

speed_sensitivity.jpg__PID:9ed4625b-aabc-4f0e-baa5-82b5b56159fd

compatibility

Compatibility-double-slide.jpg__PID:6650b8e9-ed9e-4462-9baa-bc7f0e3aa582
fox-compat.jpg__PID:b8e9ed9e-d462-4baa-bc7f-0e3aa582b5b5
rockshox-compat.jpg__PID:e9ed9ed4-625b-4abc-bf0e-3aa582b5b561

setup

Setup2.jpg__PID:3b7ac850-cb2b-4329-93a4-d9a6724b1454
Setup3.jpg__PID:7ac850cb-2b33-49d3-a4d9-a6724b14547c
Slice 4.jpg__PID:d73b7ac8-50cb-4b33-a9d3-a4d9a6724b14
Setup2.jpg__PID:3b7ac850-cb2b-4329-93a4-d9a6724b1454
Setup3.jpg__PID:7ac850cb-2b33-49d3-a4d9-a6724b14547c
Slice 4.jpg__PID:d73b7ac8-50cb-4b33-a9d3-a4d9a6724b14

TruTune inserts come in specified equivalent number of tokens. Do not exceed the manufacturer specified maximum number of tokens / spacers for your fork model. If in doubt, contact us at info@trutune.co.uk.

FORKINSERT MODELTOKEN LENGTH
Rockshox Lyrik / Zeb / Pike / Yari / SID 
DebonAir 35 and 38mm stanchions
Rockshox 35 / 38 mmSTD: 4
SHORT: 3
Rockshox SID SL / Recon
DebonAir 32mm stanchions 
Rockshox 32 mm3
FOX 36 (not Rhythm
FOX 38 
Fox 36 / 38STD: 5
SHORT: 4
FOX 34 (not E-bike)
FOX 36 Rhythm
Fox 344
FOX 40Fox 404
Fox 32
Fox 34 E-bike
Fox 324

in the media...

pinkbike magazine

"trutune suspension inserts unlock more travel"

"When I first heard about it, I thought it was a joke, but after talking to the engineers at Carbon Air, the company behind TruTune, I realised the physics was sound. Now I've had the chance to ride it and, at the risk of giving away the ending of this review too soon, it does what it promises."

singletrack magazine

"the tardis token"

"With the TruTune installed I can finally get modern big negative air chambered fat-legged forks to perform better. It doesn’t give you everything that a coil fork does but it certainly improves things massively. If your bike has a 38mm fork on it that you can’t quite get to do the things you need it to do, a TruTune MTB AIr Fork Insert is totally worth a look."

PINKBIKE POLE VOIMA

TruTune form part of the setup on the Pole Voima reviewed on Pinkbike magazine.

"I called in a Carbon Air insert to make the Zeb more linear and upped the pressure to 72 psi. This allowed me to use more of the travel on big hits while sitting a little higher in the travel, which better matched the feel from the rear."

Read Article

PINKBIKE INNOVATION OF THE YEAR 2021 NOMINATION

Our technology was nominated for Pinkbike's innovation of the year 2021, after our prototypes were tested by Seb Stott.

"This one's a lot harder to explain. I thought it was a joke when I first heard about it. But Carbon Air has been used in the air suspension of Audi's luxury sedans for years.In short, its aim is to make air suspension work more like a coil. It does this by using activated carbon, which can be made from sawdust and has the counter-intuitive property of mopping up more molecules of air per cubic centimetre than the same volume of empty space. It acts as the opposite of a volume spacer - effectively increasing the volume of an air chamber."

Read Article

WARNING

Use of TruTune components may invalidate any warranty with the original equipment manufacturer.

Rock Shox, Fox, Rhythm, FLOAT, DebonAir, Dual Position, Pike, Lyrik, Yari, Reba, Bluto, Revolution, SID are registered trademarks and propery of their respective owners. All company and product names used in this website are for identification and compatibility purposes only. Use of these names, trademarks and brands does not imply endorsement.

WARNING

Use of TruTune components may invalidate any warranty with the original equipment manufacturer.

Rock Shox, Fox, Rhythm, FLOAT, DebonAir, Dual Position, Pike, Lyrik, Yari, Reba, Bluto, Revolution, SID are registered trademarks and propery of their respective owners. All company and product names used in this website are for identification and compatibility purposes only. Use of these names, trademarks and brands does not imply endorsement.