Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Diamondback
2021 Diamondback Line 24
Previous used estimate
$294 - $302
Actual value depends on condition, size, and local demand.
Value Guide market data · 2021 Diamondback Line 24
12-month projected trend
11%
Direction and magnitude, not judgment
vs. category average
7%
Drops faster than category avg
Price over time - 2021 Diamondback Line 24
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
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Compare Line 24 models
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Overview
About this bike
A bike they can grow with. A bike they can grow with, the Line 24 is a junior version of our do-anything hardtail mountain bike. Equipped to handle the abuse of real mountain bike trails and daily use around the neighborhood, it's made from the same aluminum alloy as our full-size bikes, so it's practically indestructible. An SR Suntour fork performs like the big people's bikes, giving your ripper-to-be 80mm of front suspension travel. The 24-inch wheels are stiff and stable, shod with aggressive 2.25-inch wide Vee Rubber tires: perfect for tearing it up in the woods. Disc brakes and a wide-range SRAM 1x8 drivetrain are real performance features, underscoring that the Line 24 is a legit mountain bike—only smaller. This model fits riders 53"-62" tall, aged approximately 8-12 years old.
Specifications
- Subtype
- Cross Country
- Category
- Mountain
- Component Fork
- SR Suntour XCT JR 24", 80mm Travel, 28mm Stanchion, Aluminum Lowers, w/ Preload Adjust
- Component Hubs
- Front: 32h Aluminum w/ CNC Disc Mount Rear: 32h Aluminum w/ CNC Disc Mount, Cassette
- Component Rims
- 32h Diamondback Doublewall
- Component Size
- 24-inch
- Component Stem
- Diamondback "Shortie", 45mm Reach, 31.8mm Bar Bore
- Product Family
- Line
- Component Chain
- KMC Z82, 8 Speed
- Component Color
- Dark Green Gloss
- Component Frame
- 6061 T-6 Aluminum Jr-24" Frame, Formed Tubing, Disc Specific w/ Replaceable Hanger
- Component Brakes
- Tektro Aries Mechanical Disc, w/ 160mm Rotors
- Component Pedals
- DB4L Resin Platform
- Component Saddle
- DB Sync'r Jr. Saddle
- Component Spokes
- 14g Stainless Steel
- Component Headset
- FSA IS-3/NO.11 Integrated Style
- Component Crankset
- Aluminum Arm, w/ 32T Steel Single Ring, 155mm
- Component Seatpost
- Aluminum Micro Adjust, 27.2mm
- Component Shifters
- SRAM X4 8 Speed
- Component Handlebar
- Diamondback, 720mm Wide, 15mm Rise, 31.8mm Bar Bore
- Component Rear Tire
- Vee Tire Crown Gem, 24x2.25"
- Component Front Tire
- Vee Tire Crown Gem, 24x2.25"
- Component Tape Grips
- DB "Flanged" 135mm Silicone
- Component Brake Levers
- Tektro 2 Finger Aluminum Linear w/ Reach Adjust
- Component Bottom Bracket
- Sealed Cartridge
- Component Rear Derailleur
- SRAM X4, 8 Speed
- Component Front Derailleur
- Upper Chain Guide, 34.9mm Clamp Diameter
- Component Cassette Freewheel
- SRAM PG820 Cassette, 8 Speed, 11-32T
- Hubs
- Front: 32h Aluminum w/ CNC Disc Mount Rear: 32h Aluminum w/ CNC Disc Mount, Cassette
- Rims
- 32h Diamondback Doublewall
- Crankset
- Aluminum Arm, w/ 32T Steel Single Ring, 155mm
- Pedals
- DB4L Resin Platform
- Bottom Bracket
- Sealed Cartridge
- Chain
- KMC Z82, 8 Speed
- Seatpost
- Aluminum Micro Adjust, 27.2mm
- Saddle
- DB Sync'r Jr. Saddle
- Handlebar
- Diamondback, 720mm Wide, 15mm Rise, 31.8mm Bar Bore
- Headset
- FSA IS-3/NO.11 Integrated Style
- Front Derailleur
- Upper Chain Guide, 34.9mm Clamp Diameter
- Rear Derailleur
- SRAM X4, 8 Speed
- Rear Tire
- Vee Tire Crown Gem, 24x2.25"
- Stem
- Diamondback "Shortie", 45mm Reach, 31.8mm Bar Bore
- Brake Levers
- Tektro 2 Finger Aluminum Linear w/ Reach Adjust
- Brakes
- Tektro Aries Mechanical Disc, w/ 160mm Rotors
- Fork
- SR Suntour XCT JR 24", 80mm Travel, 28mm Stanchion, Aluminum Lowers, w/ Preload Adjust
- Frame
- 6061 T-6 Aluminum Jr-24" Frame, Formed Tubing, Disc Specific w/ Replaceable Hanger
- Shifters
- SRAM X4 8 Speed
- Tape/Grips
- DB "Flanged" 135mm Silicone
- Color
- Dark Green Gloss
- Size
- 24-inch
- Spokes
- 14g Stainless Steel
- Cassette/Freewheel
- SRAM PG820 Cassette, 8 Speed, 11-32T
- Front Tire
- Vee Tire Crown Gem, 24x2.25"
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.
Inspection
Suspension service
Confirm fork and rear shock service intervals and check pivot bearings for play.