Fox 34 setup
The 34 is a trail fork that is easy to leave too firm or too soft. Put in your weight for your starting numbers, straight from Fox’s own charts.
Pump to 88 psi, then measure sag and adjust.
Rebound, spacers and limits
- Compression: 10 clicks out on both high-speed and low-speed, counted from fully closed. The last click of the high-speed ring is Firm mode, for climbing.
- Rebound: Fox prints one 34 rebound column, for GRIP. It publishes no separate 34 GRIP X column: start GRIP X near the same count and adjust to feel.
- Volume spacers at 130 mm: ships with 2, max 5.
- Source: FOX 2025 32mm/34mm owner’s manual (tech.ridefox.com/bike/owners-manuals/2978)
Fix what you feel
Tap what your fork does. Fixes are for your GRIP X. Change one thing at a time, then ride the same section again.
Harsh over roots and braking bumps
Too much air, too much compression, or rebound too slow.
- Check sag first. Under 15% means too much air.
- Open high-speed compression 2 clicks (counter-clockwise). Make sure the ring isn’t parked on its final Firm click.
Dives under braking and on steep roll-ins
Not enough low-speed compression, or too much sag.
- Add low-speed compression 2 clicks (clockwise).
- Still diving and sag is past 20%? Add 3–5 psi.
Bottoms out hard on drops and big landings
Not enough high-speed compression, or the air spring isn’t ramping up enough.
- Add high-speed compression 1–2 clicks. Still bottoming? Add one volume spacer.
- Stay within Fox’s max spacer count for your travel.
Never uses full travel, even on big hits
Too many spacers, too much air, or too much compression.
- If sag is right, remove one volume spacer.
- Open high-speed compression 1–2 clicks.
Bouncy, or clunks at full extension
Rebound is too fast.
- Add rebound 1–2 clicks (clockwise).
Rides lower and lower through rough sections
Rebound is too slow, so the fork packs down.
- Open rebound 2 clicks (counter-clockwise).
Tell Suspend how it felt and it gives you the exact click to change on your Fox 34. Free for your first bike.
Full Fox 34 reference
For the 2025-and-newer 34 FLOAT (GRIP X or GRIP) and the 34 Rhythm sold on complete bikes. Fox’s 2025, 2026 and 2027 manuals give the same pressure, rebound and spacer numbers. Not for the 34 Step-Cast or 34 SL, which have their own charts, and not for older 34s with FIT4 or GRIP2: use the manual for your year on tech.ridefox.com.
Fox 34 air pressure chart
| lb | kg | FLOAT | Rhythm |
|---|---|---|---|
| under 130 | under 59 | 64 | 58 |
| 130–140 | 59–64 | 69 | 63 |
| 140–150 | 64–68 | 74 | 68 |
| 150–160 | 68–73 | 78 | 72 |
| 160–170 | 73–77 | 83 | 77 |
| 170–180 | 77–82 | 88 | 82 |
| 180–190 | 82–86 | 92 | 86 |
| 190–200 | 86–91 | 97 | 91 |
| 200–210 | 91–95 | 102 | 96 |
| 210–220 | 95–100 | 106 | 100 |
| 220–230 | 100–104 | 111 | 105 |
| 230–240 | 104–109 | 116 | 110 |
| 240–250 | 109–113 | 120 | 114 |
psi. Source: FOX 2025 32mm/34mm owner’s manual (tech.ridefox.com/bike/owners-manuals/2978).
Fox 34 rebound clicks by weight
| lb | GRIP |
|---|---|
| under 130 | 13 |
| 130–140 | 12 |
| 140–150 | 11 |
| 150–160 | 10 |
| 160–170 | 9 |
| 170–180 | 8 |
| 180–190 | 7 |
| 190–200 | 6 |
| 200–210 | 5 |
| 210–220 | 4 |
| 220–230 | 3 |
| 230–240 | 2 |
| 240–250 | 1 |
Fox prints one 34 rebound column, for GRIP. It publishes no separate 34 GRIP X column: start GRIP X near the same count and adjust to feel. Turn the dial fully clockwise until it stops, then count the clicks back out. Push the fork down hard and let go. If it clunks at full extension, rebound is too fast.
Fox 34 sag in millimetres
| Travel | 15% (firm) | 20% (plush) |
|---|---|---|
| 120 mm | 18 mm | 24 mm |
| 130 mm | 20 mm | 26 mm |
| 140 mm | 21 mm | 28 mm |
| 150 mm | 23 mm | 30 mm |
Measure with the compression adjusters fully open, dressed to ride, weight spread across saddle, bars and pedals.
Fox 34 compression settings
| Damper | Start at |
|---|---|
| GRIP X | 10 clicks out on both high-speed and low-speed, counted from fully closed. The last click of the high-speed ring is Firm mode, for climbing. |
| GRIP | Lever fully Open for descending. Use the positions between Open and Firm for more support (Rhythm: sweep it toward Firm). |
Fox 34 volume spacers
| Travel | Ships with | Max |
|---|---|---|
| 140 mm | 1 | 5 |
| 130 mm | 2 | 5 |
| 120 mm | 3 | 6 |
| Travel | Ships with | Max |
|---|---|---|
| 150 mm | 0 | 4 |
| 140 mm | 0 | 4 |
| 130 mm | 1 | 5 |
| 120 mm | 2 | 5 |
Spacers change how hard the fork ramps up at the end of its travel, not its sag. Add one if you bottom out too easily, remove one if you never get near full travel.
Which Fox 34 damper do I have?
- GRIP X: Two dials on top of the right leg (a high-speed ring around a low-speed dial) and one rebound dial at the bottom.
- GRIP: One lever on top of the right leg and one rebound dial at the bottom. On a Rhythm the lever sweeps from Open to Firm with no Medium click.
GRIP X comes on Factory (130–140 mm) and Performance Elite (130 mm), GRIP on Performance (130 mm) and on the Rhythm (130–150 mm), which is sold only on complete bikes.
Fox 34 service interval
Fox recommends a full service every 125 hours of riding or once a year, whichever comes first.
Questions
What air pressure should I run in my Fox 34?
Start from Fox’s chart for your riding weight with gear. A 170–180 lb rider starts at 88 psi on a 34 FLOAT and 82 psi on a Rhythm. Then set sag to 15–20%. Fox says up to 10 psi off the chart is normal. Never go over 120 psi.
How much sag should a Fox 34 have?
15–20% of travel: 20–26 mm on a 130 mm fork. Measure with the compression adjusters fully open, dressed to ride, with your weight spread across saddle, bars and pedals.
How many clicks of rebound on a Fox 34?
From fully closed, a 170–180 lb rider starts at 8 clicks out on GRIP. Lighter riders run more clicks out, heavier riders fewer. Fox prints no separate 34 GRIP X rebound count, so start there and adjust to feel.
Does this work for my older Fox 34?
No. These numbers are for the 2025-and-newer 34 FLOAT and Rhythm. Older 34s with FIT4 or GRIP2 dampers have different charts in their own year’s manual on tech.ridefox.com.
Related guides
Sources · last checked 2026-10-09
- FOX owner’s manual: FORK 2025 32mm/34mm incl. Step-Cast and Taper-Cast (tech.ridefox.com)
- FOX owner’s manual: FORK 2026 32mm/34mm (tech.ridefox.com)
- FOX owner’s manual: FORK 2027 32mm/34mm (tech.ridefox.com)
- FOX 34 product page: dampers, travel and click counts (ridefox.com)
- FOX GRIP dampers page (ridefox.com)
Starting points from the manufacturer’s charts, not a substitute for your fork’s manual. Always confirm with a sag measurement and stay under the max pressure.