TW3900XC - Twitter AL6061 Mountain Bike

Key Components

• Frame Size: 29" (27.5") × 15" / 17" / 19"
• Colors: White / Dark Gray / Matte Black
• Weight: 13.6 kg (all variants)

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Frame & Structure

• 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
• Clamps: Aluminum alloy quick-release, 34.9 mm
• Headset: Aluminum alloy, 44×44 mm
• Washer: Aluminum alloy, 3×28.6×10 mm

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Drivetrain Options

Variant 1 – SHIMANO M315 3×8-Speed

• System: SHIMANO M315 (3×8-speed)
• Shifters: SHIMANO M315 (3×8-speed)
• Front Derailleur: SHIMANO TY700
• Rear Derailleur: SHIMANO TY300
• Crankset: RS aluminum alloy, square axis 24-34-42T
• Cassette: SUGEK 8-speed, 11–32T
• Chain: SUMC 8-speed
• Bottom Bracket: Kenli square axis, BB68 threaded

Variant 2 – LTWOO 3×10-Speed

• System: RETROSPEC (LTWOO) 3×10-speed
• Shifters: RETROSPEC (LTWOO) 3×10-speed
• Front Derailleur: RETROSPEC (LTWOO) 3-speed
• Rear Derailleur: RETROSPEC (LTWOO) 10-speed
• Crankset: RS aluminum alloy hollow 24-32-42T
• Cassette: SUGEK 10-speed, 11–36T
• Chain: SUMC 10-speed
• Bottom Bracket: Hollow, BSA68×24 threaded

Variant 3 – LTWOO 2×12-Speed

• System: RETROSPEC (LTWOO) 2×12-speed
• Shifters: RETROSPEC (LTWOO) 2×12-speed
• Front Derailleur: RETROSPEC (LTWOO) 2-speed
• Rear Derailleur: RETROSPEC (LTWOO) 12-speed
• Crankset: RS aluminum alloy hollow 28-38T
• Cassette: SUNSHINE 12-speed, 11–42T
• Chain: SUMC 12-speed
• Bottom Bracket: Hollow, BSA68×24 threaded

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Wheelset & Tires

• 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"

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Braking System

• Brakes: TEKTRO hydraulic disc, 160 mm front / 160 mm rear

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Additional Components

• Grips: 22.2×120 mm, comfortable MTB style
• Saddle: Lightweight and ergonomic for MTB riding
• Pedals: Lightweight & skid-resistant
• Cables: JAGWIRE internal & external routing

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Included Accessories

• Reflectors: Handlebar, seat post, front wheel, rear wheel
• Extras: Bottle cage + tools + rear kickstand
• Documentation: Manual + warranty card