2021 BMC
Blast 20

A 20″ aluminum frame mountain youth bike with mid-range components and tektro hydraulic disc brakes.

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Insights

Ride Feel

Based on frame geometry and build specs.

Handling

nimblestable

Blast 20

Other Mountain Youth bikes

Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

28 km/h

Blast 20

Highest gear

(descending)

Sizing

20"

110cm – 135cm

Rider Fit Notes

None yet.

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Geometry

Specs

Build

Frame	Blast 20" Lightweight Aluminium with Powder Coat Finish, • 1 1/8"" Head Tube, • BSA Threaded Bottom Bracket, • 140mm Post Mount, • 9X135mm QR BB Standard: BSA, Threaded Colors: Bronze; Petrol Blue
Fork	Blast 20" Lightweight Aluminium with Powder Coat Finish, • 140mm Post Mount, • 9X100mm QR
Bottom Bracket	BSA, threaded
Stem	BMC BLAST, 40mm length, ± 6 angle
Handlebar	SDG Slater Handlebar, 650mm wide, 20mm rise, 19mm bar ends, 31.8mm clamp.
Saddle	SDG Fly Jr
Seatpost	Alloy 27.2mm, 300mm long Type: Rigid

Groupset

Rear Derailleur	SRAM X4, Medium Cage
Crank	Lightweight Forged Alloy Cranks, 32T 1x Specific Narrow Wide chainring, 127mm
Shifters	SRAM X4 8Spd Trigger
Cassette	Sunrace 11-34T, Black finish
Chain	SRAM 8spd
Brakes	Tektro HD-M286, short reach levers, 140mm rotors Type: Tektro Hydraulic Disc

Wheels

Rims	Alex MD25, 25mm inner width
Front Hub	CNC Machined Alloy Hub Body, Sealed Bearings, Quick Release
Rear Hub	CNC Machined Alloy Hub Body, Sealed Bearings, Quick Release
Tires	Kenda Booster 20x2.4"

Rider Notes

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First added 26 November

Last updated 26 November

Not listed for 1,645 days

2021 BMCBlast 20