Guerrilla Gravity Megatrail User manual

Owner’s Manual

Contents
•Assembly
–Frame fittings
–Fastener torque
•Setup
–Fork
–Shock install & orientation, Coil shock?
–Suspension sag, air volume spacers, and damper settings
•Trail Mode/ Gravity Mode
•Maintenance and Small Parts
•Warranty
•Safety

Assembly
•Frame Fittings
–Headset: EC49/40 lower, ZS49/28 for tapered steer tube
–BB: Standard 73mm BSA threaded
–Seat post: Ø30.9mm, Clamp: Ø34.9mm, stealth routing compatible
–Rear hub: 12x142
–Rear brake mount: International Standard
–Shock: 200x57, 8x22 front, 8x40 rear hardware

Assembly –Fastener Torque
1. Main Pivot Axle
1. Adjust pre-load on angular contact bearings (8mm hex)
2. Then tighten pinch bolt to 5 Nm (45 in-lb) (5mm hex)
2. Rocker Pivot Axle
1. Adjust pre-load on angular contact bearings (5mm hex)
2. Then tighten pinch bolt to 5 Nm (45 in-lb) (5mm hex)
3. Seatstay/Rocker Bolts: 5 Nm (45in-lb) (5mm hex)
4. Seatstay/Axle Block Bolts: 5 Nm (45in-lb) (5mm hex)
1
2
3
4

Assembly –Fastener Torque
1. Rear Axle
1. Pinch bolt holds axle nut insert and derailleur hanger, to remove rear wheel, only loosen axle head
2. Derailleur Hanger
1. The pinch bolt clamps the nut insert and attaches the derailleur hanger
2. Tighten pinch bolt to 5 Nm (45 in-lb) (5mm hex)
1
2
2

Setup –Shock & Fork
1. Install Both Shock Bolts Before Tightening, Torque Spec: xxx Nm
2. Are Coil Springs Recommended?
1. The Megatrail’s leverage curve is optimized for air springs, however, if your riding style and preferences end up using Gravity
Mode most/all of the time, a coil sprung shock can be used
3. Recommended Fork Sizes:
1. 27.5” Frame: Axle to crown height of 555mm ±5mm; eg Rockshox Pike 27.5 160, MRP Stage @170, most 27.5” 160mm travel
forks
2. 26” Frame: Axle to crown height of 545mm ±5mm; eg Rockshox Pike 26 160, MRP Stage @160, most 26” 160mm travel forks
Fork Axle To
Crown Height

Setup –Sag, Air Volume, Dampers
1. Air Volume Recommendations
1. The Megatrail is optimized for mid to high volume air springs, such as the DB Air, DB Inline, Monarch Debonair, etc
2. Bottom out resistance can be tuned with air volume spacers independent of sag, if desired
2. Are Coil Springs Recommended?
1. The Megatrail’s leverage curve is optimized for air springs. If you prefer a more coil-like feel in a bike, we recommend the DB
Air CS or Monarch Plus Debonair on the Megatrail.
3. Sag Recommendations, See RideGG.com For Additional Detail
1. Sag numbers are obtained by measuring the suspension travel used to statically support your weight, geared up to ride.
2. To measure sag, set the damper settings relatively soft, sit on the bike in climbing position, with the seatpost at full height,
naturally weight the handlebars. This method produces the most usable and repeatable measurements.
3. Lightly bounce up and down to break any seal stiction, return to the seated climbing position and push the fork and shock O-
rings against the shock/fork seals. Lean to the side to dismount without further compressing the suspension.
4. Measure the shock/fork travel used to support your weight
5. Front sag recommendation: 15% = 24mm on a 160mm travel fork
6. Rear sag recommendation: 12-14mm on the Megatrail
4. Damper Settings, See RideGG.com for Additional Detail. A Quick Baseline Can Be Obtained:
1. The spring supports your weight, and should be optimized first
2. Compression damping then controls dive speed. Insufficient compression damping makes the bike dive too easily under
braking and feel unstable in hard cornering. Excessive compression damping diminishes small bump compliance and makes
the wheel deflect off obstacles.
3. Rebound damping controls how fast the suspension returns from being compressed. In general, the fastest rebound setting
that doesn’t allow wallowing works best. Rebound damping is a function of spring stiffness, so if spring rate is increased,
rebound damping will need to be proportionally increased as well.
5. Tuning
1. Suspension settings are iterative and personal for different terrain and rider weights and riding styles
2. Baselines are meant to be exactly that. Further tuning is encouraged to refine the ride for you and your terrain. Feel free to
ask us for advice: Bik[email protected]

Trail Mode & Gravity Mode
All mountain geometry with more mid
stroke support that provides a very
efficient pedaling platform with a slightly
taller BB setting. This mode is ideal for
sustained climbing, technical climbing, and
all-around descending.
Trail Mode
Gravity Mode™
More aggressive, DH-inspired geometry and
suspension feel, with a softer mid-stroke
that is best suited for downhill domination.
The pedaling platform is still perfectly
adequate for mild climbs, such as fire roads.

Super Trail & Super Gravity
The geometry and travel of Trail
Mode with an extra stiff mid-stroke and a
lot of progression. This mode would be
best for long, smooth climbs or pedal
sections.
Super Trail
Super Gravity
The geometry and travel of Gravity
Mode™with the leverage curve of Trail
Mode. This mode is designed for going
mach-stupid, carrying speed over the rough
and hitting big jumps.

Maintenance
1. Every Ride Checklist
1. Check for loose bolts. This does not mean to over-tighten the bolts every ride. Check to see if any bolts
have loosened, and if so, then retighten them to the torque specs provided in this manual.
2. Check the brakes for proper operation
3. Check tire pressure
4. Clean and lube the chain and drivetrain
5. Make sure your headset is tight by holding the front brake and rocking the bike back and forth and feeling
for play or slop at the headtube, headset bearing cup junction
6. Clean all stanchions, including the fork, shock and dropper post.
2. Every 10 Rides Checklist
1. Check to make sure your brake pads have sufficient pad material left, replace if they are close to being worn
down to the metal base
2. Make sure your tires are safe to ride on. Look for damaged casings, knobs are still in tact, and there is no
dry rotting.
3. Check chain wear. Bike shops have a tool to measure this, if the wear is beyond 75% of the usable range,
replace it.
4. Check spoke tension for both wheels. If a spoke is loose, tighten it so that it’s tension is uniform with the
other spokes.
3. Every 20 Rides Checklist
1. Clean frame and check for damage or cracks
2. Replace shifter cable and housing
3. Check brakes, suspension and dropper seat post for smooth operation and service them if necessary.