MTB suspension calculator
Pick your fork, put in your weight. Every number is from the fork maker’s own chart.
Pump to 86 psi, then measure sag and adjust.
Compression, spacers and limits
- Compression: 10 clicks out on both high-speed and low-speed, counted from fully closed (Fox’s 2027 manual says 5 each).
- Rebound: Turn the dial fully clockwise until it stops, then count the clicks back out.
- Volume spacers at 160 mm: ships with 1, max 6.
- Max pressure 120 psi.
- Source: FOX 2025 36mm/38mm owner’s manual (tech.ridefox.com)
Add your rear shock
Start around 170 psi, then set 25–30% sag. Shock makers don’t chart pressure by weight because your frame’s leverage changes it, so sag is what counts.Source: Universal Fox / RockShox method
Setup guides by fork
Rebound clicks, spacers and fixes for your exact model.
Tell Suspend how the ride felt and it gives you the exact click to change. Free for your first bike.
Setup reference
How to set up your MTB suspension
- Pump to the starting pressure. Fork to the number above, shock to about your body weight in psi. Bounce a few times to equalize the air spring.
- Measure sag. Push the O-ring to the seal, settle into your riding position, step off and read the travel used. Adjust pressure until you hit the target. Pressure is the start; sag is the truth.
- Set rebound, then ride. How the bike feels over roots, in corners and off drops tells you what to change next.
Fork air pressure charts by model
Each chart is transcribed from the maker’s own setup guide. Fox notes ±10 psi off the chart is normal.
Fox 32 Step-Cast air pressure chart
| lb | psi |
|---|---|
| under 130 | 65 |
| 130–140 | 70 |
| 140–150 | 74 |
| 150–160 | 80 |
| 160–170 | 85 |
| 170–180 | 90 |
| 180–190 | 96 |
| 190–200 | 101 |
| 200–210 | 106 |
| 210–220 | 111 |
| 220–230 | 116 |
| 230–240 | 121 |
| 240–250 | 126 |
Max 140 psi · 15–20% sag. Source: FOX 2025 32mm/34mm owner’s manual (tech.ridefox.com/bike/owners-manuals/2978).
Fox 32 Rhythm air pressure chart
| lb | psi |
|---|---|
| under 130 | 65 |
| 130–140 | 70 |
| 140–150 | 74 |
| 150–160 | 80 |
| 160–170 | 85 |
| 170–180 | 90 |
| 180–190 | 96 |
| 190–200 | 101 |
| 200–210 | 106 |
| 210–220 | 111 |
| 220–230 | 116 |
| 230–240 | 121 |
| 240–250 | 126 |
Max 140 psi · 15–20% sag. Source: FOX 2025 32mm/34mm owner’s manual (tech.ridefox.com/bike/owners-manuals/2978).
Fox 34 FLOAT air pressure chart
| lb | psi |
|---|---|
| under 130 | 64 |
| 130–140 | 69 |
| 140–150 | 74 |
| 150–160 | 78 |
| 160–170 | 83 |
| 170–180 | 88 |
| 180–190 | 92 |
| 190–200 | 97 |
| 200–210 | 102 |
| 210–220 | 106 |
| 220–230 | 111 |
| 230–240 | 116 |
| 240–250 | 120 |
Max 120 psi · 15–20% sag. Source: FOX 2025 32mm/34mm owner’s manual (tech.ridefox.com/bike/owners-manuals/2978).
Fox 34 Rhythm air pressure chart
| lb | psi |
|---|---|
| under 130 | 58 |
| 130–140 | 63 |
| 140–150 | 68 |
| 150–160 | 72 |
| 160–170 | 77 |
| 170–180 | 82 |
| 180–190 | 86 |
| 190–200 | 91 |
| 200–210 | 96 |
| 210–220 | 100 |
| 220–230 | 105 |
| 230–240 | 110 |
| 240–250 | 114 |
Max 120 psi · 15–20% sag. Source: FOX 2025 32mm/34mm owner’s manual (tech.ridefox.com/bike/owners-manuals/2978).
Fox 36 FLOAT air pressure chart
| lb | psi |
|---|---|
| under 130 | 66 |
| 130–140 | 70 |
| 140–150 | 74 |
| 150–160 | 78 |
| 160–170 | 82 |
| 170–180 | 86 |
| 180–190 | 89 |
| 190–200 | 94 |
| 200–210 | 99 |
| 210–220 | 105 |
| 220–230 | 109 |
| 230–240 | 113 |
| 240–250 | 117 |
Max 120 psi · 15–20% sag. Source: FOX 2025 36mm/38mm owner’s manual (tech.ridefox.com).
Fox 36 Rhythm air pressure chart
| lb | psi |
|---|---|
| under 130 | 55 |
| 130–140 | 59 |
| 140–150 | 63 |
| 150–160 | 67 |
| 160–170 | 72 |
| 170–180 | 76 |
| 180–190 | 80 |
| 190–200 | 85 |
| 200–210 | 89 |
| 210–220 | 93 |
| 220–230 | 97 |
| 230–240 | 102 |
| 240–250 | 106 |
Max 120 psi · 15–20% sag. Source: FOX 2025 36mm/38mm owner’s manual (tech.ridefox.com).
Fox 36 E-Bike+ air pressure chart
| lb | psi |
|---|---|
| under 130 | 71 |
| 130–140 | 76 |
| 140–150 | 81 |
| 150–160 | 85 |
| 160–170 | 90 |
| 170–180 | 95 |
| 180–190 | 99 |
| 190–200 | 104 |
| 200–210 | 109 |
| 210–220 | 113 |
| 220–230 | 115 |
| 230–240 | 117 |
| 240–250 | 120 |
Max 120 psi · 15–20% sag. Source: FOX 2025 36mm/38mm owner’s manual (tech.ridefox.com).
Fox 38 FLOAT air pressure chart
| lb | psi |
|---|---|
| under 130 | 72 |
| 130–140 | 76 |
| 140–150 | 80 |
| 150–160 | 84 |
| 160–170 | 89 |
| 170–180 | 93 |
| 180–190 | 97 |
| 190–200 | 102 |
| 200–210 | 106 |
| 210–220 | 110 |
| 220–230 | 114 |
| 230–240 | 119 |
| 240–250 | 123 |
Max 140 psi · 15–20% sag. Source: FOX 2025 36mm/38mm owner’s manual (tech.ridefox.com/bike/owners-manuals/2979); 2026 manual identical.
Fox 38 Rhythm air pressure chart
| lb | psi |
|---|---|
| under 130 | 59 |
| 130–140 | 63 |
| 140–150 | 67 |
| 150–160 | 72 |
| 160–170 | 76 |
| 170–180 | 80 |
| 180–190 | 84 |
| 190–200 | 88 |
| 200–210 | 92 |
| 210–220 | 97 |
| 220–230 | 101 |
| 230–240 | 105 |
| 240–250 | 109 |
Max 120 psi · 15–20% sag. Source: FOX 2025 36mm/38mm owner’s manual (tech.ridefox.com/bike/owners-manuals/2979); 2026 manual identical.
Fox 38 E-Bike+ air pressure chart
| lb | psi |
|---|---|
| under 130 | 81 |
| 130–140 | 85 |
| 140–150 | 89 |
| 150–160 | 93 |
| 160–170 | 98 |
| 170–180 | 102 |
| 180–190 | 106 |
| 190–200 | 111 |
| 200–210 | 115 |
| 210–220 | 119 |
| 220–230 | 123 |
| 230–240 | 128 |
| 240–250 | 132 |
Max 140 psi · 15–20% sag. Source: FOX 2025 36mm/38mm owner’s manual (tech.ridefox.com/bike/owners-manuals/2979); 2026 manual identical.
Fox 38 2027 air pressure chart
| lb | psi |
|---|---|
| under 130 | 54 |
| 130–140 | 58 |
| 140–150 | 62 |
| 150–160 | 67 |
| 160–170 | 71 |
| 170–180 | 75 |
| 180–190 | 80 |
| 190–200 | 84 |
| 200–210 | 88 |
| 210–220 | 93 |
| 220–230 | 97 |
| 230–240 | 100 |
| 240–250 | 104 |
Max 140 psi · 15–20% sag. Source: FOX 2027 38mm owner’s manual (tech.ridefox.com/bike/owners-manuals/3166).
Fox 40 (DH) air pressure chart
| lb | psi |
|---|---|
| under 150 | 52–64 |
| 150–180 | 64–76 |
| 180–210 | 76–87 |
| 210–250 | 87–101 |
Max 120 psi · 15–20% sag. Source: FOX 2025 40mm owner’s manual (tech.ridefox.com/bike/owners-manuals/2980) — banded ranges.
RockShox Pike 120 mm air pressure chart
| lb | psi |
|---|---|
| under 120 | 55 |
| 120–140 | 65 |
| 140–160 | 75 |
| 160–180 | 85 |
| 180–200 | 95 |
| 200–220 | 105 |
| 220–240 | 110 |
Max 163 psi · 20–30% sag. Source: RockShox 2025–2027 Front Suspension Specifications (sram.com).
RockShox Pike 130–140 mm air pressure chart
| lb | psi |
|---|---|
| under 120 | 45 |
| 120–140 | 55 |
| 140–160 | 65 |
| 160–180 | 75 |
| 180–200 | 85 |
| 200–220 | 95 |
| 220–240 | 100 |
Max 163 psi · 20–30% sag. Source: RockShox 2025–2027 Front Suspension Specifications (sram.com).
RockShox Lyrik 2026 & older 140 mm air pressure chart
| lb | psi |
|---|---|
| under 120 | 55 |
| 120–140 | 65 |
| 140–160 | 75 |
| 160–180 | 85 |
| 180–200 | 95 |
| 200–220 | 105 |
| 220–240 | 110 |
Max 163 psi · 20–30% sag. Source: RockShox 2024–2027 Front Suspension Specifications, Lyrik DebonAir+ (sram.com).
RockShox Lyrik 2026 & older 150–160 mm air pressure chart
| lb | psi |
|---|---|
| under 120 | 45 |
| 120–140 | 55 |
| 140–160 | 65 |
| 160–180 | 75 |
| 180–200 | 85 |
| 200–220 | 95 |
| 220–240 | 100 |
Max 163 psi · 20–30% sag. Source: RockShox 2024–2027 Front Suspension Specifications, Lyrik DebonAir+ (sram.com).
RockShox Lyrik 2027 140 mm air pressure chart
| lb | psi |
|---|---|
| under 120 | 105 |
| 120–140 | 124 |
| 140–160 | 142 |
| 160–180 | 157 |
| 180–200 | 169 |
| 200–220 | 178 |
| 220–240 | 181 |
Max 300 psi · 20–30% sag. Source: RockShox 2027 Front Suspension Spec, Lyrik Ultimate/Select+/Select (the 2027 Lyrik Base keeps DebonAir+) (sram.com).
RockShox Lyrik 2027 150 mm air pressure chart
| lb | psi |
|---|---|
| under 120 | 95 |
| 120–140 | 114 |
| 140–160 | 132 |
| 160–180 | 147 |
| 180–200 | 159 |
| 200–220 | 168 |
| 220–240 | 171 |
Max 300 psi · 20–30% sag. Source: RockShox 2027 Front Suspension Spec, Lyrik Ultimate/Select+/Select (the 2027 Lyrik Base keeps DebonAir+) (sram.com).
RockShox Lyrik 2027 160 mm air pressure chart
| lb | psi |
|---|---|
| under 120 | 85 |
| 120–140 | 104 |
| 140–160 | 122 |
| 160–180 | 137 |
| 180–200 | 149 |
| 200–220 | 158 |
| 220–240 | 161 |
Max 300 psi · 20–30% sag. Source: RockShox 2027 Front Suspension Spec, Lyrik Ultimate/Select+/Select (the 2027 Lyrik Base keeps DebonAir+) (sram.com).
RockShox Lyrik 2027 170 mm air pressure chart
| lb | psi |
|---|---|
| under 120 | 75 |
| 120–140 | 94 |
| 140–160 | 112 |
| 160–180 | 127 |
| 180–200 | 139 |
| 200–220 | 148 |
| 220–240 | 151 |
Max 300 psi · 20–30% sag. Source: RockShox 2027 Front Suspension Spec, Lyrik Ultimate/Select+/Select (the 2027 Lyrik Base keeps DebonAir+) (sram.com).
RockShox ZEB 2026 & older 150–160 mm air pressure chart
| lb | psi |
|---|---|
| under 120 | 41 |
| 120–140 | 50 |
| 140–160 | 58 |
| 160–180 | 66 |
| 180–200 | 74 |
| 200–220 | 83 |
| 220–240 | 87 |
Max 148 psi · 20–30% sag. Source: RockShox 2024–2027 Front Suspension Specifications, ZEB DebonAir+ (sram.com).
RockShox ZEB 2026 & older 170–180 mm air pressure chart
| lb | psi |
|---|---|
| under 120 | 33 |
| 120–140 | 41 |
| 140–160 | 50 |
| 160–180 | 58 |
| 180–200 | 66 |
| 200–220 | 74 |
| 220–240 | 78 |
Max 148 psi · 20–30% sag. Source: RockShox 2024–2027 Front Suspension Specifications, ZEB DebonAir+ (sram.com).
RockShox ZEB 2026 & older 190 mm air pressure chart
| lb | psi |
|---|---|
| under 120 | 25 |
| 120–140 | 33 |
| 140–160 | 42 |
| 160–180 | 50 |
| 180–200 | 58 |
| 200–220 | 66 |
| 220–240 | 70 |
Max 148 psi · 20–30% sag. Source: RockShox 2024–2027 Front Suspension Specifications, ZEB DebonAir+ (sram.com).
RockShox ZEB 2027 150 mm air pressure chart
| lb | psi |
|---|---|
| under 120 | 97 |
| 120–140 | 116 |
| 140–160 | 134 |
| 160–180 | 150 |
| 180–200 | 164 |
| 200–220 | 176 |
| 220–240 | 181 |
Max 300 psi · 20–30% sag. Source: RockShox 2027 Front Suspension Spec, ZEB Ultimate/Select+/Select (the 2027 ZEB Base keeps DebonAir+) (sram.com).
RockShox ZEB 2027 160 mm air pressure chart
| lb | psi |
|---|---|
| under 120 | 87 |
| 120–140 | 106 |
| 140–160 | 124 |
| 160–180 | 140 |
| 180–200 | 154 |
| 200–220 | 166 |
| 220–240 | 171 |
Max 300 psi · 20–30% sag. Source: RockShox 2027 Front Suspension Spec, ZEB Ultimate/Select+/Select (the 2027 ZEB Base keeps DebonAir+) (sram.com).
RockShox ZEB 2027 170 mm air pressure chart
| lb | psi |
|---|---|
| under 120 | 77 |
| 120–140 | 96 |
| 140–160 | 114 |
| 160–180 | 130 |
| 180–200 | 144 |
| 200–220 | 156 |
| 220–240 | 161 |
Max 300 psi · 20–30% sag. Source: RockShox 2027 Front Suspension Spec, ZEB Ultimate/Select+/Select (the 2027 ZEB Base keeps DebonAir+) (sram.com).
RockShox ZEB 2027 180 mm air pressure chart
| lb | psi |
|---|---|
| under 120 | 67 |
| 120–140 | 86 |
| 140–160 | 104 |
| 160–180 | 120 |
| 180–200 | 134 |
| 200–220 | 146 |
| 220–240 | 151 |
Max 300 psi · 20–30% sag. Source: RockShox 2027 Front Suspension Spec, ZEB Ultimate/Select+/Select (the 2027 ZEB Base keeps DebonAir+) (sram.com).
RockShox SID air pressure chart
| lb | psi |
|---|---|
| under 100 | 33 |
| 100–120 | 45 |
| 120–140 | 58 |
| 140–160 | 70 |
| 160–180 | 82 |
| 180–200 | 93 |
| 200–220 | 100 |
Max 150 psi · 10–20% sag. Source: RockShox 2026 Front Suspension Specifications, SID (sram.com).
RockShox Domain 130–150 mm air pressure chart
| lb | psi |
|---|---|
| under 120 | 41 |
| 120–140 | 50 |
| 140–160 | 58 |
| 160–180 | 66 |
| 180–200 | 74 |
| 200–220 | 83 |
| 220–240 | 87 |
Max 148 psi · 20–30% sag. Source: RockShox 2025–2027 Front Suspension Specifications, Domain C1 (sram.com).
RockShox Domain 160–180 mm air pressure chart
| lb | psi |
|---|---|
| under 120 | 33 |
| 120–140 | 41 |
| 140–160 | 50 |
| 160–180 | 58 |
| 180–200 | 66 |
| 200–220 | 74 |
| 220–240 | 78 |
Max 148 psi · 20–30% sag. Source: RockShox 2025–2027 Front Suspension Specifications, Domain C1 (sram.com).
RockShox BoXXer (DH) 180 mm air pressure chart
| lb | psi |
|---|---|
| under 120 | 103 |
| 120–140 | 128 |
| 140–160 | 153 |
| 160–180 | 178 |
| 180–200 | 203 |
| 200–220 | 228 |
| 220–240 | 240 |
Max 300 psi · 20–30% sag. Source: RockShox 2024–2027 Front Suspension Specifications, BoXXer (sram.com).
RockShox BoXXer (DH) 190–200 mm air pressure chart
| lb | psi |
|---|---|
| under 120 | 80 |
| 120–140 | 100 |
| 140–160 | 120 |
| 160–180 | 140 |
| 180–200 | 160 |
| 200–220 | 180 |
| 220–240 | 190 |
Max 300 psi · 20–30% sag. Source: RockShox 2024–2027 Front Suspension Specifications, BoXXer (sram.com).
RockShox Recon 100–120 mm air pressure chart
| lb | psi |
|---|---|
| under 140 | 60 |
| 140–160 | 78 |
| 160–180 | 93 |
| 180–200 | 110 |
| 200–220 | 120 |
Max 205 psi · 10–20% sag. Source: RockShox 2024–2026 Front Suspension Specifications, Recon Gold (sram.com).
RockShox Recon 130–150 mm air pressure chart
| lb | psi |
|---|---|
| under 140 | 50 |
| 140–160 | 68 |
| 160–180 | 83 |
| 180–200 | 98 |
| 200–220 | 105 |
Max 205 psi · 10–20% sag. Source: RockShox 2024–2026 Front Suspension Specifications, Recon Gold (sram.com).
RockShox Reba 100–110 mm air pressure chart
| lb | psi |
|---|---|
| under 100 | 45 |
| 100–120 | 58 |
| 120–140 | 70 |
| 140–160 | 84 |
| 160–180 | 97 |
| 180–200 | 111 |
| 200–220 | 117 |
Max 165 psi · 10–20% sag. Source: RockShox 2026 Front Suspension Specifications, Reba (sram.com).
RockShox Reba 120–130 mm air pressure chart
| lb | psi |
|---|---|
| under 100 | 41 |
| 100–120 | 54 |
| 120–140 | 67 |
| 140–160 | 80 |
| 160–180 | 93 |
| 180–200 | 107 |
| 200–220 | 113 |
Max 165 psi · 10–20% sag. Source: RockShox 2026 Front Suspension Specifications, Reba (sram.com).
Öhlins RXF36 m.2 air pressure chart
| lb | psi | Ramp-up |
|---|---|---|
| under 132 | 75 | 165 |
| 132–154 | 85 | 175 |
| 154–176 | 95 | 185 |
| 176–198 | 105 | 195 |
| 198–220 | 115 | 205 |
| 220–243 | 125 | 215 |
| 243–266 | 135 | 225 |
10–15% sag. Source: Öhlins RXF36 m.2 Air owner’s manual (ohlins.com).
Öhlins RXF38 m.2 air pressure chart
| lb | psi | Ramp-up |
|---|---|---|
| under 132 | 75 | 165 |
| 132–154 | 85 | 175 |
| 154–176 | 95 | 185 |
| 176–198 | 105 | 195 |
| 198–220 | 115 | 205 |
| 220–243 | 125 | 215 |
| 243–266 | 135 | 225 |
10–15% sag. Source: Öhlins RXF38 m.2 Air owner’s manual (ohlins.com).
Marzocchi Bomber Z1 air pressure chart
| lb | psi |
|---|---|
| under 130 | 55 |
| 130–140 | 59 |
| 140–150 | 63 |
| 150–160 | 67 |
| 160–170 | 72 |
| 170–180 | 76 |
| 180–190 | 80 |
| 190–200 | 85 |
| 200–210 | 89 |
| 210–220 | 93 |
| 220–230 | 97 |
| 230–240 | 102 |
| 240–250 | 106 |
Max 120 psi · 15–20% sag. Source: Marzocchi Bomber Z1 owner’s guide 605-00-311 (RAIL, 2024+) and tuning guide 605-00-256 (GRIP).
Marzocchi Bomber Z2 air pressure chart
| lb | psi |
|---|---|
| under 130 | 58 |
| 130–140 | 63 |
| 140–150 | 68 |
| 150–160 | 72 |
| 160–170 | 77 |
| 170–180 | 82 |
| 180–190 | 86 |
| 190–200 | 91 |
| 200–210 | 96 |
| 210–220 | 100 |
| 220–230 | 105 |
| 230–240 | 110 |
| 240–250 | 114 |
Max 120 psi · 15–20% sag. Source: Marzocchi Bomber Z2 tuning guide 605-00-237.
Marzocchi Bomber 58 (DH) air pressure chart
| lb | psi |
|---|---|
| under 130 | 49 |
| 130–140 | 53 |
| 140–150 | 57 |
| 150–160 | 61 |
| 160–170 | 65 |
| 170–180 | 69 |
| 180–190 | 73 |
| 190–200 | 76 |
| 200–210 | 80 |
| 210–220 | 84 |
| 220–230 | 88 |
| 230–240 | 92 |
| 240–250 | 96 |
Max 120 psi · 15–20% sag. Source: Marzocchi Bomber 58 tuning guide (ridefox.com).
Manitou Mezzer Pro 140 mm air pressure chart
| lb | psi | IRT |
|---|---|---|
| under 140 | 40 | 61 |
| 140–160 | 49 | 74 |
| 160–180 | 59 | 87 |
| 180–200 | 68 | 100 |
| 200–220 | 77 | 113 |
| 220–240 | 86 | 126 |
| 240–260 | 95 | 139 |
Max 120 psi · 20–25% sag. Source: Manitou Mezzer Pro / LT Pro Gen 2 set-up guide (hayesbicycle).
Manitou Mezzer Pro 150 mm air pressure chart
| lb | psi | IRT |
|---|---|---|
| under 140 | 39 | 59 |
| 140–160 | 48 | 72 |
| 160–180 | 57 | 85 |
| 180–200 | 66 | 98 |
| 200–220 | 75 | 111 |
| 220–240 | 84 | 124 |
| 240–260 | 93 | 137 |
Max 120 psi · 20–25% sag. Source: Manitou Mezzer Pro / LT Pro Gen 2 set-up guide (hayesbicycle).
Manitou Mezzer Pro 160 mm air pressure chart
| lb | psi | IRT |
|---|---|---|
| under 140 | 38 | 57 |
| 140–160 | 47 | 70 |
| 160–180 | 55 | 83 |
| 180–200 | 64 | 96 |
| 200–220 | 73 | 109 |
| 220–240 | 82 | 122 |
| 240–260 | 91 | 135 |
Max 120 psi · 20–25% sag. Source: Manitou Mezzer Pro / LT Pro Gen 2 set-up guide (hayesbicycle).
Manitou Mezzer Pro 170 mm air pressure chart
| lb | psi | IRT |
|---|---|---|
| under 140 | 37 | 55 |
| 140–160 | 45 | 68 |
| 160–180 | 54 | 81 |
| 180–200 | 62 | 94 |
| 200–220 | 71 | 107 |
| 220–240 | 80 | 120 |
| 240–260 | 88 | 133 |
Max 120 psi · 20–25% sag. Source: Manitou Mezzer Pro / LT Pro Gen 2 set-up guide (hayesbicycle).
Manitou Mezzer Pro 180 mm air pressure chart
| lb | psi | IRT |
|---|---|---|
| under 140 | 35 | 53 |
| 140–160 | 44 | 66 |
| 160–180 | 52 | 79 |
| 180–200 | 61 | 92 |
| 200–220 | 69 | 105 |
| 220–240 | 77 | 118 |
| 240–260 | 86 | 131 |
Max 120 psi · 20–25% sag. Source: Manitou Mezzer Pro / LT Pro Gen 2 set-up guide (hayesbicycle).
Manitou Mezzer Pro 190 mm air pressure chart
| lb | psi | IRT |
|---|---|---|
| under 140 | 34 | 51 |
| 140–160 | 42 | 64 |
| 160–180 | 51 | 77 |
| 180–200 | 59 | 90 |
| 200–220 | 67 | 103 |
| 220–240 | 75 | 116 |
| 240–260 | 83 | 129 |
Max 120 psi · 20–25% sag. Source: Manitou Mezzer Pro / LT Pro Gen 2 set-up guide (hayesbicycle).
Manitou Mattoc Pro 110 mm air pressure chart
| lb | psi | IRT |
|---|---|---|
| under 130 | 44 | 59 |
| 130–150 | 54 | 74 |
| 150–170 | 65 | 90 |
| 170–190 | 75 | 101 |
| 190–210 | 86 | 124 |
| 210–230 | 96 | 141 |
| 230–250 | 112 | 150 |
Max 120 psi · 20–25% sag. Source: Manitou Mattoc Pro Gen 3 set-up guide (2023, hayesbicycle).
Manitou Mattoc Pro 120 mm air pressure chart
| lb | psi | IRT |
|---|---|---|
| under 130 | 42 | 56 |
| 130–150 | 51 | 70 |
| 150–170 | 61 | 85 |
| 170–190 | 70 | 95 |
| 190–210 | 80 | 116 |
| 210–230 | 89 | 132 |
| 230–250 | 104 | 148 |
Max 120 psi · 20–25% sag. Source: Manitou Mattoc Pro Gen 3 set-up guide (2023, hayesbicycle).
Manitou Mattoc Pro 130 mm air pressure chart
| lb | psi | IRT |
|---|---|---|
| under 130 | 42 | 56 |
| 130–150 | 52 | 72 |
| 150–170 | 62 | 86 |
| 170–190 | 71 | 96 |
| 190–210 | 81 | 117 |
| 210–230 | 91 | 134 |
| 230–250 | 106 | 150 |
Max 120 psi · 20–25% sag. Source: Manitou Mattoc Pro Gen 3 set-up guide (2023, hayesbicycle).
Manitou Mattoc Pro 140–150 mm air pressure chart
| lb | psi | IRT |
|---|---|---|
| under 130 | 38 | 51 |
| 130–150 | 48 | 65 |
| 150–170 | 56 | 78 |
| 170–190 | 66 | 88 |
| 190–210 | 74 | 107 |
| 210–230 | 84 | 123 |
| 230–250 | 97 | 138 |
Max 120 psi · 20–25% sag. Source: Manitou Mattoc Pro Gen 3 set-up guide (2023, hayesbicycle).
Why there’s no rear shock pressure chart
No shock maker publishes a weight-to-pressure chart, because your frame’s leverage ratio changes the pressure bike to bike. So you start near your body weight in psi and set sag. Pick your shock under “Add your rear shock” for its real sag target and max pressure. The Suspend app carries data for many more forks and shocks than the 21 here.
MTB suspension setup FAQ
Where do these air pressure numbers come from?
Each one is transcribed from the fork maker’s own published chart: Fox owner’s manuals, RockShox spec sheets, and the Öhlins, Marzocchi, Manitou, and Cane Creek setup guides. Pick your fork and the calculator shows that model’s real starting pressure for your weight, with the source noted under the result. It is not a generic weight formula.
Why do I have to pick my exact fork model?
Because a Fox 36, a RockShox Lyrik, and an Öhlins RXF36 all want different pressures at the same rider weight, sometimes by 20 psi or more. A single formula that ignored the model would be wrong for most people. Picking the model is what makes the number trustworthy.
What sag should I run?
For most trail riding, aim for 15–20% sag on the fork and 27–30% on the shock. Cross-country runs a touch firmer, downhill a touch deeper. Sag is how far the suspension settles under your static riding weight, as a percentage of total travel. Set the pressure, then confirm sag by measuring.
Why doesn’t it give a shock pressure for my exact shock?
No manufacturer publishes a weight-to-pressure chart for rear shocks, because the frame’s leverage ratio changes the pressure bike to bike. Even RockShox and Fox tell you to start near your body weight in psi and then set sag by measurement. That’s the method the calculator gives you.
Does riding weight include my gear?
Yes. Use your kitted weight: you plus helmet, shoes, pack, and water. The manufacturer charts are built around fully dressed riding weight.
Will this get me a perfect setup?
It gets you a trustworthy starting point, which is the hard part of a blank setup. The feel comes from riding and adjusting: harsh over roots, wallowing in turns, blowing through travel. That’s what the Suspend app does. You describe the ride, it tells you the click to change and remembers what worked.
Related guides
Pressure figures are starting points from manufacturer setup charts, not a substitute for your fork or shock’s manual. Charts change between model years and trims; always confirm with a sag measurement and stay within the rated pressure.