Blast 20




In Detail

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Lightweight Frame
Tailored Ergonomics
Dedicated Geometry
Powder Coating Finish
Control and Safety
Twostroke AL 20 Sticker Kits

Lightweight Frame

Double butted tubes for a lightweight frame with a distinctive and premium look.

Tailored Ergonomics

Bars, levers, cranks and saddle are tailored for the ergonomics of young riders for a comfortable and custom-made ride.

Dedicated Geometry

Inspired by our MTB’s and adapted to smaller riders for intuitive and reliable riding.

Powder Coating Finish

A durable and ecological solution to withstand years of daily use.

Control and Safety

Hydraulic brakes and high volume tires provide control and safety on various surfaces with low rolling resistance.

Twostroke AL 20 Sticker Kits

The bike can be designed to your own taste with the Twostroke AL 20 sticker kits.

Technical Details


  • SKU List

    30000458 30000459
  • Description

    Blast 20

  • Spec

    SRAM X4
  • Frame

    Blast 20" Lightweight Aluminium with Powder Coat Finish
    • 1 1/8"" Head Tube
    • BSA Threaded Bottom Bracket
    • 140mm Post Mount
    • 9X135mm QR
  • Tubing

    Al-13 Double Butted, Smoothwelded Aluminum
  • Fork

    Blast 20" Lightweight Aluminium with Powder Coat Finish
    • 140mm Post Mount
    • 9X100mm QR
  • Gears

  • Chainwheel

    Lightweight Forged Alloy Cranks, 32T 1x Specific Narrow Wide chainring, 127mm
  • Cassette

    Sunrace 11-34T, Black finish
  • Chain

    SRAM 8spd
  • Rear Derailleur

    SRAM X4, Medium Cage
  • Shifters

    SRAM X4 8Spd Trigger
  • Brakes

    Tektro HD-M286, short reach levers, 140mm rotors
  • Handlebar

    SDG Slater Handlebar, 650mm wide, 20mm rise, 19mm bar ends, 31.8mm clamp.
  • Stem

    BMC BLAST, 40mm length, ± 6 angle
  • Seatpost

    Alloy 27.2mm, 300mm long
  • Saddle

    SDG Fly Jr
  • Hubs

    CNC Machined Alloy Hub Body, Sealed Bearings, Quick Release
  • Rims

    Alex MD25, 25mm inner width
  • Tires

    Kenda Booster 20x2.4"
  • Tire Clearance

    58mm (measured width)
  • Extras

    Easy Assembly, Including sticker sets
  • Weight (Kg)

  • Weight Limit

    60 kg / 132 lb
  • ASTM Classification

    Level 3
  • Frameset Option

  • Configurable

  • Dropper Seatpost

Size 20
Rider Height CM 110-135
Top Tube MM (tt) 431
Wheelbase MM (wb) 833
Seat Tube Angle (sa) 73
Seatpost Length MM 300
Stack MM 412
Trail MM (trail) 66
Rear Center MM (rc) 342
Reach MM (reach) 305
Head Tube MM (ht) 105
Head Angle (ha) 68
BB Drop MM (drop) 40
Stem Length MM 40
Seat Tube MM (st) 275
Stem Angle ±6
Post Offset MM 15
Crank Length MM 127
Fork Rake MM (fr) 35
Front Center MM (fc) 455
Fork Length MM (fl) 307
Bar Rise MM 20
Bar Width MM 650
Backsweep 5
Standover Height mm 490

Experience BLAST