Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
BMC
2021 BMC Blast 20
Value Guide market data · 2021 BMC Blast 20
12-month trend
12%
Direction and magnitude, not judgment
vs. category average
5%
Drops faster than category avg
Price over time - 2021 BMC Blast 20
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Blast model years
2021 Blast 20 lineup
Overview
About this bike
2021 BMC Blast 20 value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork
- Blast 20" Lightweight Aluminum with Powder Coat Finish, 140mm Post Mount, 9 x 100mm QR
- Frame
- Blast 20" Lightweight Aluminum with Powder Coat Finish, 1 1/8" Head Tube, BSA Threaded Bottom Bracket, 140mm Post Mount, 9 x 135mm QR
Drivetrain
- Groupset
- Shimano Altus
- Cassette
- Sunrace 11-34T, Black finish
- Chain
- SRAM 8spd
- Chainrings
- 32T 1x Specific Narrow Wide chainring
- Crankset
- Lightweight Forged Alloy Cranks, 127mm
- Shifters
- SRAM X4 8Spd Trigger
Brakes
- Brakes
- Tektro HD-M286, short reach levers, 140mm rotors
Cockpit
- Handlebar
- SDG Slater Handlebar, 650mm wide, 20mm rise, 19mm bar ends, 31.8mm clamp.
- Saddle
- SDG Fly Jr
- Seatpost
- Alloy 27.2mm, 300mm long
- Stem
- BMC BLAST, 40mm length, ± 6 angle
Wheels & Tires
- Front Tire
- Kenda Booster 20 x 2.4"
- Hubs
- CNC Machined Alloy Hub Body, Sealed Bearings, Quick Release
- Rims
- Alex MD25, 25mm inner width
Pedals
- Pedals
- Sold separately
Frame sizing
XS4'10"-5'2"
S5'2"-5'6"
M5'6"-5'10"
L5'10"-6'2"
XL6'2"-6'6"
M highlighted as most common resale size. Sourced from catalog metadata.
Geometry
- Stack
- Varies by size
- Reach
- Varies by size
- Wheelbase
- Varies by size
Industry standard. Sourced from catalog metadata.
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Wheel condition
Inspect rims, hubs, spokes, and bearing play; ask about the tire age and any prior wheel rebuilds.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.