Marin Alcatraz: suspension setup & specs
The Marin Alcatraz is a dirt jump bike with 100 mm of fork travel. This page lists the 1 current builds with fork and gives matching starting values for SAG and tyre pressure.
Calculate the setup for your Marin Alcatraz →
All builds
Fork, weight and price according to the manufacturer. Wheel size: 26.
| Build | Fork | Weight | RRP | Calculator |
|---|---|---|---|---|
| 2 | Manitou Circus Expert (100 mm) | – | – | Setup → |
How it compares
On travel, the Marin Alcatraz is right where the “dirt jump bike” category usually is: 100 mm up front against a median of 100 mm from 10 bikes. Among Marin’s mountain bikes, the Marin Alcatraz has the shortest fork travel.
Up front, all builds get a Manitou fork.
Setup notes for this spec
- Hardtail: only the fork needs setting up. With no rear suspension, rear tyre pressure is the key adjustment for comfort and grip.
Target SAG for the Marin Alcatraz
Instead of percentages, this table gives SAG directly in millimetres, measurable with the O-ring on the stanchion. Change the pressure step by step until you reach the value; if Marin gives its own target SAG, use that.
100 mm fork (all builds)
| Riding style | Fork SAG |
|---|---|
| XC / touring | 17 % = 17 mm |
| Trail | 20 % = 20 mm |
| Enduro / rough | 22 % = 22 mm |
| Bike park | 20 % = 20 mm |
How to measure SAG is explained in our guide SAG setup.
Tyre pressure starting values
Basis: 2.25″ 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: Vee Tire, XCV 26x2.25”, LSG Compound, Wire Bead.
| Ready-to-ride weight | Front | Rear |
|---|---|---|
| 60 kg | 1.53 bar (22 psi) | 1.73 bar (25 psi) |
| 70 kg | 1.65 bar (24 psi) | 1.85 bar (27 psi) |
| 80 kg | 1.77 bar (26 psi) | 1.97 bar (29 psi) |
| 90 kg | 1.89 bar (27 psi) | 2.09 bar (30 psi) |
| 100 kg | 2.01 bar (29 psi) | 2.21 bar (32 psi) |
| 110 kg | 2.13 bar (31 psi) | 2.33 bar (34 psi) |
| 120 kg | 2.25 bar (33 psi) | 2.45 bar (36 psi) |
Air pressure in the fork
You will find a suitable starting pressure on the sticker on the fork stanchion 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.