FAST Cartridge SC4

FAST Suspension  FAST Cartridge SC4

Product Description

Why the SC4 cartridge is your best ally?
Simply put, it’s down to its specific conception with 3 independent compression ways, inspired from our up kit.
Low speed for comfort on small hits, medium speed to manage diving and balance of the bike and finally a circuit dedicated to high speed/impacts to flatten the ground.

The rebound is externally adjustable for the low speed. The high-speed rebound shims stack will be set according to your expectations.


  • 3 independent compression circuits
  • The only kit to use hydraulics to manage the diving and balance of the bike
  • Blow Off Valve on high speed to flatten the bumps
  • More grip
  • Comfort and endurance
  • + 100% sealed system thanks to Fast’s CELL FOAM

The SC4 cartridge is:

  • A unique conception with 3 independent ways
  • Custom Aeronautical 7075 T6 alloy
  • Performing, durable, consistent

Suitable for...

  • YARI forks from 2017 onwards.
  • REVELATION forks 35mm from 2018 onwards. 
  • LYRIK forks 35mm
  • PIKE forks 35mm from 2016 onwards. 
  • ZEB / DOMAIN forks 38 mm
  • FOX 36 forks 35mm from 2015 onwards. 
  • FOX 38 forks
  • MARZOCCHI Z1 from 2019 onwards.


For spare parts, if they are in stock we will send them out the same day if we receive the order before midday (except weekends). If we receive the order after midday, we will do our best to despatch them same day, but it may be the following working day. Orders placed after 3pm on Friday will be despatched on the following Monday. We normally send spare parts by Royal Mail post (see below or our 'Shipping' page for cost/delivery times).

Forks, shocks and large/heavy orders go by courier. UK deliveries are with DPD Local, for overseas customers it's DPD, FedEx or DHL.  In all cases these are fully tracked services and you'll need to sign for the delivery - please provide a suitable address with extra instructions if necessary.


You may return your order unused, within 14 days for a refund if you no longer require it, provided it is returned with its original undamaged packaging and is unused and unmarked. Please note, we do not refund postage unless items were supplied in error or are faulty.

Picking mistakes do sometime happen. If we supply the wrong part or there are parts missing from your order please let us know within 14 days of receipt so that we can correct the mistake. In the case of picking errors we will refund your postage costs on the returned item.

Faulty goods will be replaced with the same item or a suitable equivalent, as appropriate.

TF Tuned cannot be held responsible for the non-receipt of returned goods so please ensure you use a tracked and/or insured service as appropriate to the value of the goods you are returning.


Customer Reviews

"Great product, great advice from the team as always. I was having issues with my 2022 Lyrik diving, if I increased PSI it ran rough, tokens didn’t help much, had a long chat to the guys there and they recommended I look at the SC04, this damper has solved all my issues, having the mid compression is a game changer, much more balanced feeling on the bike, able to feel what the tyre is doing rather than constantly having that “washing out” feeling…. Got it dialled perfect for BPW, the Bike absolutely rails berms now! Thanks again"
Star Rating 5
Staff response...
"Great review Chris, good to hear how you've been getting on with the upgrade! Ruth @TFT"


pdfSC4 User Manual

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£395.00 inc VAT

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UK mainland delivery from FREE

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