Kona Blast Mountain Bike
Used · Fixed price · USD 225.00
Velopedia Bicycle Archive
2021 Kona Blast
Original manufacturer specifications including 27.5" wheels, geometry for 4 published sizes.
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What Velopedia knows
- Model year
- 2021
- Category
- Mountain
- Original MSRP
- $1,049.00
- Sizes
- S, M, L, XL
- Colors
- Gloss Chocolate w/ Yellow, Rust & Flame Fade Decals
- Geometry
- 4 manufacturer sizes · Geometry context
- Record coverage
- 24 preserved details · archived image · original MSRP · preserved geometry
- Archive ID
- 900001982
Model history 14 other years
Frameset
| Frame Construction | Kona Race Light 6061 Aluminum Butted |
|---|---|
| Frame Material | Aluminum |
| Fork | RockShox Judy Silver TK Solo Air 100mm |
| Rear Shock | n/a |
Drivetrain
| Shifters | Shimano Deore |
|---|---|
| Front Derailleur | n/a |
| Rear Derailleur | Shimano Deore |
| Crankset | FSA Alpha Drive 1x; Chainring: 28t |
| Bottom Bracket | FSA 7420 73mm |
| Cassette | Shimano Deore 11-51t 11spd |
| Chain | KMC X11 |
| Pedals | Kona JS2 |
Brakes
| Brakes | Brake Calipers: Shimano MT201 Hydraulic; Front Brake Rotor: Shimano RT10 180mm (centerlock); Rear Brake Rotor: Shimano RT10 160mm (centerlock); Brake Levers: Shimano MT201 Hydraulic |
|---|
Cockpit & Contact Points
| Headset | FSA No.57B |
|---|---|
| Handlebar | Kona XC/BC Riser |
| Stem | Kona XC |
| Saddle | Kona XC |
| Seatpost | Kona Thumb 31.6mm |
Wheels & Tires
| Hubs | (F) Formula 100x9mm (centerlock) / (R) Shimano 135x10mm (centerlock) |
|---|---|
| Rims | WTB ST I27 TCS 2.0 |
| Spokes | Stainless Black 14g |
| Front Tire | Maxxis Forekaster 27.5x2.35" |
| Rear Tire | Maxxis Forekaster 27.5x2.35" |
| Wheel Size | 27.5" |
Size-specific frame data
Geometry
Manufacturer-published geometry normalized for consistent archival comparison. Effective top tube and reach remain separate measurements because they describe different aspects of fit.
| Measurement | S | M | L | XL |
|---|---|---|---|---|
| Seat tube | 370 mm | 420 mm | 470 mm | 530 mm |
| Top tube | 572 mm | 600 mm | 628 mm | 667 mm |
| Head tube | 100 mm | 115 mm | 125 mm | 140 mm |
| Head-tube angle | 68° | 68° | 68° | 68° |
| Seat-tube angle | 75° | 75° | 75° | 75° |
| Chainstay / rear center | 435 mm | 435 mm | 435 mm | 435 mm |
| Wheelbase | 1109 mm | 1139 mm | 1168 mm | 1208 mm |
| Bottom-bracket drop | 50 mm | 50 mm | 50 mm | 50 mm |
| Bottom-bracket height | 305 mm | 305 mm | 305 mm | 305 mm |
| Reach | 415 mm | 440 mm | 465 mm | 500 mm |
| Stack | 585 mm | 599 mm | 608 mm | 622 mm |
| Standover height | 710 mm | 719 mm | 725 mm | 748 mm |
| Fork offset / rake | 42 mm | 42 mm | 42 mm | 42 mm |
| Front center | 678 mm | 709 mm | 737 mm | 778 mm |
| Fork length / axle-to-crown | 490 mm | 490 mm | 490 mm | 490 mm |
Geometry source: Kona first-party archive metric geometry table ↗ Measurements can vary by configuration, wheel size, or flip-chip position where noted by the manufacturer.
Geometry tools
Analyze a published size
S geometry
Archive context: Its stack of 585 mm sits toward the lower end. Its wheelbase of 1109 mm sits toward the shorter end. The head angle of 68° sits somewhat steeper than typical.
Compared with 86 distinct mountain geometries in the Small-equivalent size cohort from model years 2019–2023 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze S geometry M geometry
Archive context: Its stack of 599 mm sits toward the lower end. Its wheelbase of 1139 mm sits toward the shorter end. The head angle of 68° sits somewhat steeper than typical.
Compared with 86 distinct mountain geometries in the Medium-equivalent size cohort from model years 2019–2023 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze M geometry L geometry
Archive context: Its stack of 608 mm sits toward the lower end. Its wheelbase of 1168 mm sits toward the shorter end. The head angle of 68° sits somewhat steeper than typical.
Compared with 79 distinct mountain geometries in the Large-equivalent size cohort from model years 2019–2023 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze L geometry XL geometry
Archive context: Its stack of 622 mm sits toward the lower end. The head angle of 68° sits somewhat steeper than typical. Its wheelbase of 1208 mm sits somewhat shorter than typical.
Compared with 71 distinct mountain geometries in the XL-equivalent size cohort from model years 2019–2023 in the Velopedia archive.Want to go deeper?Open this exact published size and configuration in the Velopedia Geometry Analyzer, then complete any measurements the manufacturer did not provide.
Analyze XL geometry Parts & serviceability
Find replacement parts
KMC X11
Exact archived model
Shimano Deore 11-51t 11spd
Interpreted as Shimano Deore · 11-speed Manufacturer configuration identified from the published drivetrain
Maxxis Forekaster 27.5x2.35"
Named tire and published size
More qualified parts (6)
FSA Alpha Drive 1x; Chainring: 28t
Named archived component — verify exact version
Shimano Deore
Interpreted as Shimano Deore · 11-speed Named component · published drivetrain speed — verify exact version
Shimano Deore
Interpreted as Shimano Deore · 11-speed Named component · published drivetrain speed — verify exact version
31.6 mm seatpost
Published diameter — verify length and setback
FSA No.57B
Exact archived model
WTB ST I27 TCS 2.0
Named archived component — verify dimensions
Searches use the archived manufacturer specification, not the components currently installed on a particular bicycle. Confirm the exact model, size and fit before ordering. As an Amazon Associate I earn from qualifying purchases. Velopedia may also earn from qualifying eBay purchases. Velopedia may also earn from qualifying retailer purchases. Commercial relationships do not influence Archive specifications or analysis.
Used-bike inspection
If you’re buying this bike used
Before any test ride: both brakes should stop the bike firmly and release cleanly; both wheels should run true and be securely attached; tires should have no casing damage; and the headset, handlebar, stem, cranks and pedals should have no looseness or play.
Follow the full used-bike inspection order →- FrameLook closely for dents and hairline cracks around welds, the head tube and bottom-bracket area. Cosmetic scratches matter less than a change in shape or a crack line.Inspect the frame and fork →
- BrakesIdentify the installed brake system before riding or ordering parts. Test every installed brake separately at walking speed, confirm it stops firmly and releases cleanly, then inspect its pads, braking surfaces and complete cable or hose path.Inspect the brakes →
- SuspensionAsk when the fork was last serviced. Check the stanchions for damage, look for oil at the seals and make sure the fork moves smoothly without bushing play.Evaluate the suspension →
- DrivetrainShift through every gear under light load and measure chain wear. Confirm that the shifter, derailleur, chain and cassette belong to the same 11-speed system.Check drivetrain wear →
- Wheels & tiresSpin both wheels and watch the rims for side-to-side or vertical movement. Check for dents, cracks, loose or uneven spokes and hub play, then inspect both tire casings for cuts, cracking or exposed threads.Check wheels and tires →
Bike-specific inspection checklist 20 checks based on 6 archived component groups Open checklistClose checklist
This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.
Identity and fit
Follow the full used-bike inspection order →Archived: 2021 Kona Blast · Mountain · Published sizes: S, M, L, XL
Frame and fork
Inspect the frame and fork →Archived: Frame: Kona Race Light 6061 Aluminum Butted · Fork: RockShox Judy Silver TK Solo Air 100mm
Suspension
Evaluate the suspension →Archived: Fork: RockShox Judy Silver TK Solo Air 100mm
Drivetrain
Check drivetrain wear →Archived: Shifters: Shimano Deore · Rear derailleur: Shimano Deore · Crankset: FSA Alpha Drive 1x; Chainring: 28t · Bottom bracket: FSA 7420 73mm · Cassette: Shimano Deore 11-51t 11spd · Chain: KMC X11
Brakes
Inspect the brakes →Archived: Brakes: Brake Calipers: Shimano MT201 Hydraulic; Front Brake Rotor: Shimano RT10 180mm (centerlock); Rear Brake Rotor: Shimano RT10 160mm (centerlock); Brake Levers: Shimano MT201 Hydraulic
Wheels and tires
Check wheels and tires →Archived: Wheel size: 27.5" · Rims: WTB ST i27 TCS 2.0 · Hubs: (F) Formula 100x9mm (centerlock) / (R) Shimano 135x10mm (centerlock) · Front tire: Maxxis Forekaster 27.5x2.35" · Rear tire: Maxxis Forekaster 27.5x2.35"
Controls and contact points
Archived: Headset: FSA No.57B · Handlebar: Kona XC/BC Riser · Stem: Kona XC · Seatpost: Kona Thumb 31.6mm · Saddle: Kona XC · Pedals: Kona JS2
Before and during the test ride
Follow the full used-bike inspection order →Build relationships are limited to the archived manufacturer specifications. Confirm exact fit and standards before ordering parts or performing service.
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Recently checked marketplace data
Market Snapshot
Velopedia found 2 close used listings. That is not enough to publish a responsible market indication.
Evidence standard
Fixed-price and Best Offer item prices only
Shipping and tax excluded
Active asks, not completed sales
Model-year coverage: 0 of 2 qualifying asking-price listings explicitly state 2021. There are not yet three year-confirmed used listings, so the used summary is labeled as broader model-family context.
Affiliate disclosure: As an eBay Partner, Velopedia may be compensated if you make a purchase through these links.
Qualified asking evidence22 high-confidence matches
Model-family used askingInsufficient sample2 close used listings found.
Model-family new askingNo listingsNo close matches in this condition.
Kona Blast Mountain Bike; 27.5" Frame; Grey; 12 Speed
Used · Fixed price · offers accepted · USD 690.00
See all current matches for this bicycle →
Listings shown have not passed their eBay-supplied end time. Velopedia rechecks matched bicycles on a protected weekly cycle; availability can still change between checks. Price calculations use active fixed-price and Best Offer item prices before shipping and tax. Auction bids, auction-only prices, classified ads, lower-confidence Review candidates and ended listings are excluded. These observations are not completed-sale prices, a certified appraisal or a guarantee of value.
Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.