TW3900XC - Twitter AL6061 Mountain Bike
TW3900XC - Twitter AL6061 Mountain Bike
Twitter TW3900XC Mountain
Built to take the trail head-on, the Twitter TW3900XC is a lightweight AL6061 aluminum-alloy XC hardtail engineered for confident climbing and fast descents. Its smooth-welded MTB frame with internal cable routing, coil suspension fork with manual lockout, and hydraulic disc braking deliver control on every surface — while three drivetrain configurations let you dial the gearing to your terrain. Wide 29" / 27.5" wheels and double-wall rims keep momentum rolling from singletrack to the open path.
Key Features
- ▪ AL6061 Aluminum-Alloy MTB Frame with smooth welding and internal cable routing for a clean, durable XC platform.
- ▪ Coil Suspension Fork with Manual Lockout — soak up the trail when you want it, lock it out for efficient climbs.
- ▪ TEKTRO Hydraulic Disc Brakes (160mm front / 160mm rear) for strong, consistent all-weather stopping power.
- ▪ Three Drivetrain Configurations — SHIMANO M315 3×8, RS LTWOO 3×10, or RS LTWOO 2×12 to match your terrain.
- ▪ Double-Wall Disc-Compatible Wheelset on sealed-bearing hubs with CST 29" / 27.5" × 2.1" tires.
- ▪ 720mm Alloy Cockpit (31.8×720mm bar, 90mm stem) with ergonomic MTB grips and saddle for trail control.
Engineering & Design Highlights
Trail Drivetrain
A clean rear-derailleur, cassette and chain setup driving the rear wheel. Available in SHIMANO M315 3×8, RS LTWOO 3×10, or RS LTWOO 2×12 — wide-range gearing built for steep climbs and fast trail sections alike.
Suspension Front End
An aluminum-alloy coil suspension fork with manual lockout smooths out rocks and roots, paired with a hydraulic disc rotor up front. Lock it out for efficient seated climbs, open it up when the trail turns rough.
Trail-Ready Wheelset
Double-wall aluminum-alloy rims with rivets on disc-compatible sealed-bearing hubs, laced with 14G spokes and wrapped in grippy CST 29" / 27.5" × 2.1" tires for traction and rolling speed off-road.
Drivetrain Configurations
SHIMANO M315 — 3×8 Speed (24S)
SHIMANO M315 shifters with a TY700 front and TY300 rear derailleur, an RS aluminum-alloy square-axis 24-34-42T crankset and SUGEK 11–32T 8-speed cassette. A dependable, easy-shifting setup for all-round trail riding.
RS LTWOO — 3×10 Speed (30S)
RETROSPEC (LTWOO) 3×10 shifters and derailleurs with an RS aluminum-alloy hollow 24-32-42T crankset and SUGEK 11–36T 10-speed cassette. Wider range and tighter steps for varied terrain and longer climbs.
RS LTWOO — 2×12 Speed (24S)
RETROSPEC (LTWOO) 2×12 shifters and derailleurs with an RS aluminum-alloy hollow 28-38T crankset and a huge SUNSHINE 11–42T 12-speed cassette. Massive climbing range with clean, modern shifting.
Specifications
| Frame | TW3900XC, MTB geometry, AL6061 aluminum alloy, smooth welding, internal cable routing |
| Fork | Aluminum alloy suspension fork, coil system with manual lockout |
| Seat Post | Aluminum alloy, 31.6×350 mm |
| Handlebar | Aluminum alloy handlebar (31.8×720 mm) with 90 mm stem |
| Headset | Aluminum alloy, 44×44 mm |
| Shifters |
SHIMANO M315: SHIMANO M315, 3×8-speed RS LTWOO 3×10: RETROSPEC (LTWOO), 3×10-speed RS LTWOO 2×12: RETROSPEC (LTWOO), 2×12-speed |
| Front Derailleur |
SHIMANO M315: SHIMANO TY700 RS LTWOO 3×10: RETROSPEC (LTWOO) 3-speed RS LTWOO 2×12: RETROSPEC (LTWOO) 2-speed |
| Rear Derailleur |
SHIMANO M315: SHIMANO TY300 RS LTWOO 3×10: RETROSPEC (LTWOO) 10-speed RS LTWOO 2×12: RETROSPEC (LTWOO) 12-speed |
| Crankset |
SHIMANO M315: RS aluminum alloy, square axis, 24-34-42T RS LTWOO 3×10: RS aluminum alloy hollow, 24-32-42T RS LTWOO 2×12: RS aluminum alloy hollow, 28-38T |
| Cassette |
SHIMANO M315: SUGEK 8-speed, 11–32T RS LTWOO 3×10: SUGEK 10-speed, 11–36T RS LTWOO 2×12: SUNSHINE 12-speed, 11–42T |
| Chain |
SHIMANO M315: SUMC 8-speed RS LTWOO 3×10: SUMC 10-speed RS LTWOO 2×12: SUMC 12-speed |
| Bottom Bracket |
SHIMANO M315: Kenli square axis, BB68 threaded RS LTWOO 3×10 / 2×12: Hollow, BSA68×24 threaded |
| Brakes | TEKTRO hydraulic disc, 160 mm front / 160 mm rear |
| Hubs | RS aluminum alloy, 2 sealed bearings, disc-compatible, 32 holes |
| Rims | RS aluminum alloy, double wall with rivets, W25×H21 mm |
| Spokes | SHUNJIU circular 14G |
| Tires | CST 29" / 27.5" × 2.1" |
| Grips | 22.2×120 mm, comfortable MTB style |
| Saddle | Lightweight and ergonomic for MTB riding |
| Pedals | Lightweight & skid-resistant |
| Cables | JAGWIRE internal & external routing |
| Frame Size | 29" (27.5") × 15" / 17" / 19" |
| Colors | White · Dark Gray · Matte Black |
| Net Weight | 13.6 KG (all variants) |
What's in the Box
- Factory pre-assembled Twitter TW3900XC mountain bike
- Standard safety reflectors (handlebar, seat post, front & rear wheels)
- Bottle cage + tools + rear kickstand
- Official manual + Warranty card
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