Megatrail Owner S Manual
Megatrail Owner S Manual
Megatrail Owner S Manual
Contents
Assembly
Frame fittings
Fastener torque
Setup
Fork
Shock install & orientation, Coil shock?
Suspension sag, air volume spacers, and damper settings
Assembly
Frame Fittings
Headset: EC49/40 lower, ZS49/28 for tapered steer tube
BB: Standard 73mm BSA threaded
2.
3.
4.
3
4
2
1
Rear Axle
1.
2.
Pinch bolt holds axle nut insert and derailleur hanger, to remove rear wheel, only loosen axle head
Derailleur Hanger
1.
2.
The pinch bolt clamps the nut insert and attaches the derailleur hanger
Tighten pinch bolt to 5 Nm (45 in-lb) (5mm hex)
2
1
3.
The Megatrails 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
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
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
2.
3.
3.
4.
5.
6.
Sag numbers are obtained by measuring the suspension travel used to statically support your weight, geared up to ride.
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.
Lightly bounce up and down to break any seal stiction, return to the seated climbing position and push the fork and shock Orings against the shock/fork seals. Lean to the side to dismount without further compressing the suspension.
Measure the shock/fork travel used to support your weight
Front sag recommendation: 15% = 24mm on a 160mm travel fork
Rear sag recommendation: 12-14mm on the Megatrail
Damper Settings, See RideGG.com for Additional Detail. A Quick Baseline Can Be Obtained:
1.
2.
3.
5.
The Megatrails 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.
4.
The Megatrail is optimized for mid to high volume air springs, such as the DB Air, DB Inline, Monarch Debonair, etc
Bottom out resistance can be tuned with air volume spacers independent of sag, if desired
Tuning
1.
2.
Suspension settings are iterative and personal for different terrain and rider weights and riding styles
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: Bikes@RideGG.com
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 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.
2.
3.
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.
Check the brakes for proper operation
Check tire pressure
Clean and lube the chain and drivetrain
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
Clean all stanchions, including the fork, shock and dropper post.
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
Make sure your tires are safe to ride on. Look for damaged casings, knobs are still in tact, and there is no
dry rotting.
Check chain wear. Bike shops have a tool to measure this, if the wear is beyond 75% of the usable range,
replace it.
Check spoke tension for both wheels. If a spoke is loose, tighten it so that its tension is uniform with the
other spokes.
Maintenance
1.
2.
Avoid high pressure washing, especially near any bearings or seals. We designed the pivot bearings to be
shielded from water spray as much as practical, but gentle washing will produce longer bearing lives. Use a
mild soap and water.
Small Parts
1.
12x142 Rear axle, derailleur hanger, nut insert and hanger bolt are all standard Syntace parts, available from
Guerrilla Gravity or most bike shops
6901 SM MAX
Bearings
1.
Replacement
1.
2.
3.
The main pivot and rocker pivot have single row angular contact bearings (7901 upper, 7903 lower), and the orientation is critical.
When replacing, the black rubber seal must face outwards as shown below. The blue seals all face inwards.
With all bearing replacement, apply a thin layer of grease to the outer bearing race or bearing bore in the frame before install.
It is also critical to get the new bearings to go in straight. Dont use a hammer. An arbor press (shown below) is best. A vice is
the second best tool. If you dont have either, we recommend having a qualified mechanic/shop do the work.
Warranty
1. One-year frame warranty
1. For one year, we will repair or replace frame component failures that are the result of defective materials
or workmanship
2. This is assumed that the failure is the result under normal riding conditions
3. This warranty does not cover any components on the bicycle
4. This warranty is void if the failure is the result of improper assembly of components or hardware. If you
are unsure if components or hardware are improperly assembled, contact a GG representative before
riding the bike
3.
We are not responsible for any component failures attached to the bike, but we will help connect you
with the proper manufacturer to rectify the issue. We do make an attempt to only provide components
we are confident in, but failures do happen.
Safety
1.
Mountain biking is an inherently dangerous sport, and the risk is yours to keep yourself safe while riding by wearing
the proper protective equipment and riding within your abilities at all times. Guerrilla Gravity is not liable for any
injuries you incur while riding and/or crashing.
2.
3.
If your bike is less than fully assembled when you receive it, take it to a qualified mechanic. If you assemble it yourself,
we assume no responsibility for improper construction leading to equipment failure or personal injury. If youre in
doubt about who is a qualified mechanic, call us and well help you find one in your area.
4.
Minimum leg length If there is less than one inch between your crotch and the top tube, the bike is too big for you.
Oops. Let us know if this is the case for you.
5.
Serial number Each Guerrilla Gravity bike has a serial number on the bottom of the bottom bracket. This number
denotes the model, date of fabrication, and manufacturing location. Make a note of this number in your records in
case your bike is stolen.