Rocky Mountain Altitude: suspension setup & specs
The Rocky Mountain Altitude is an enduro bike with 170 mm of fork travel and 160 mm at the rear. This page lists the 11 current builds with fork, shock and shock size and gives matching starting values for SAG and tyre pressure.
Calculate the setup for your Rocky Mountain Altitude →
All builds
Fork, shock, shock size (eye-to-eye length × stroke) and rear travel, weight and price according to the manufacturer. Wheel size: 29.
| Build | Fork | Shock | Shock size | Rear travel | Weight | RRP | Calculator |
|---|---|---|---|---|---|---|---|
| Alloy 30 | Marzocchi Bomber Z (170 mm) | FOX Float X Performance | – | 160 mm | – | – | Setup → |
| Alloy 30 | RockShox Zeb RC (170 mm) | FOX Float X Performance | – | 160 mm | – | – | Setup → |
| Alloy 50 | RockShox Zeb RC (170 mm) | RockShox Super Deluxe Select+ | – | 160 mm | – | – | Setup → |
| Alloy 50 | RockShox Zeb RC (170 mm) | RockShox Super Deluxe Select+ | – | 160 mm | – | – | Setup → |
| Alloy 70 | FOX 38 Float EVOL GRIP X2 Factory Series (170 mm) | FOX DHX2 Coil Factory | – | 160 mm | – | – | Setup → |
| Alloy 70 | FOX 38 Float EVOL GRIP X2 Factory Series (170 mm) | FOX DHX2 Coil Factory | – | 160 mm | – | – | Setup → |
| Carbon 50 | RockShox Zeb Select (170 mm) | RockShox Super Deluxe Select+ | – | 160 mm | – | – | Setup → |
| Carbon 50 | RockShox Zeb Select (170 mm) | RockShox Super Deluxe Select+ | – | 160 mm | – | – | Setup → |
| Carbon 70 | FOX 38 Float EVOL GRIP X2 Factory Series (170 mm) | FOX Float X2 Factory | – | 160 mm | – | – | Setup → |
| Carbon 70 | FOX 38 Float EVOL GRIP X2 Factory Series (170 mm) | FOX Float X2 Factory | – | 160 mm | – | – | Setup → |
| Carbon 90 | RockShox ZEB Ultimate (170 mm) | RockShox Vivid Ultimate | – | 160 mm | – | – | Setup → |
How it compares
170 mm at the fork almost exactly matches the 170 mm median of the 41 bikes in the “enduro bike” category in our database. The rear offers 160 mm, 10 mm less than the front. Within Rocky Mountain’s mountain bikes, it sits between the Rocky Mountain Instinct and the Rocky Mountain Slayer on travel. The frame is made of carbon.
Depending on the build, fork and shock come from FOX, Marzocchi and RockShox. The fork line-up ranges from the Marzocchi Bomber Z to the RockShox ZEB Ultimate. With the FOX DHX2 Coil Factory, the Alloy 70 build has a coil shock – here the spring rate determines SAG.
Setup notes for this spec
- Fork (Marzocchi Bomber Z): air goes in through the valve on top of the left leg. After every change, compress the fork firmly a few times before measuring SAG.
- Rebound: on FOX, Marzocchi and RockShox suspension the rebound adjuster is red. Always count clicks from fully closed (clockwise to the stop) so you can return to any setting.
- Coil shock (FOX DHX2 Coil Factory): SAG is determined by the spring rate. Only add enough preload to stop the spring from rattling.
- Shock (FOX Float X Performance): get on the bike in your normal riding position, step off carefully and read the O-ring. Always cycle the shock a few times after pumping.
Target SAG for the Rocky Mountain Altitude
The table converts the recommended SAG percentages into millimetres, so you can check them with the O-ring directly on the stanchion and on the shock shaft. Adjust the air pressure until the value is right. If Rocky Mountain specifies its own target SAG for your model, that takes priority.
170 mm fork (all builds)
| Riding style | Fork SAG |
|---|---|
| XC / touring | 17 % = 29 mm |
| Trail | 20 % = 34 mm |
| Enduro / rough | 22 % = 37 mm |
| Bike park | 20 % = 34 mm |
How to measure SAG is explained in our guide SAG setup.
Tyre pressure starting values
Basis: 2.50″ tyre width, tubeless, trail casing. If you run tubes, add about 0.2 bar (2.9 psi); with an insert, about 0.1 bar (1.5 psi) less is enough. Stock tyres: F: Maxxis Assegai 2.5 3C MaxxGrip EXO+ Tubeless Ready | R: Maxxis Minion DHR II 2.4 3C MaxxTerra DD Tubeless Ready; F: Maxxis Assegai 2.5 WT 3C MaxxGrip EXO+ Tubeless Ready | R: Maxxis Minion DHR II 2.4 WT 3C MaxxTerra DD Tubeless Ready; F: Maxxis Minion DHF 2.5 EXO Tubeless Ready | R: Maxxis Minion DHR II 2.4 EXO Tubeless Ready; F: Maxxis Minion DHF 2.5 WT EXO Tubeless Ready | R: Maxxis Minion DHR II 2.4 WT EXO Tubeless Ready.
| Ready-to-ride weight | Front | Rear |
|---|---|---|
| 60 kg | 1.43 bar (21 psi) | 1.63 bar (24 psi) |
| 70 kg | 1.55 bar (22 psi) | 1.75 bar (25 psi) |
| 80 kg | 1.67 bar (24 psi) | 1.87 bar (27 psi) |
| 90 kg | 1.79 bar (26 psi) | 1.99 bar (29 psi) |
| 100 kg | 1.91 bar (28 psi) | 2.11 bar (31 psi) |
| 110 kg | 2.03 bar (29 psi) | 2.23 bar (32 psi) |
| 120 kg | 2.15 bar (31 psi) | 2.35 bar (34 psi) |
Air pressure in the fork and shock
You will find a suitable starting pressure on the sticker on the fork stanchion (or on the shock) or in the suspension manufacturers’ setup charts. Our calculator gives you a starting value including rebound for your weight and riding style. What matters afterwards is the measured SAG from the table above.
Sources
- Altitude Alloy 30
- Altitude Alloy 30
- Altitude Alloy 50
- Altitude Alloy 50
- Altitude Alloy 70
- Altitude Alloy 70
- Altitude Carbon 50
- Altitude Carbon 50
- Altitude Carbon 70
- Altitude Carbon 70
- Altitude Carbon 90