Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Opus
2018 Opus Thumper
Previous used estimate
$118 - $121
Actual value depends on condition, size, and local demand.
Value Guide market data · 2018 Opus Thumper
12-month projected trend
— %
Direction and magnitude, not judgment
vs. category average
3%
Drops faster than category avg
Price over time - 2018 Opus Thumper
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Thumper model years
Compare Thumper models
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Overview
About this bike
For real mountain bike performance, the Bolt and Thumper are bang on! Their aluminum frames and quality components will satisfy every kid’s taste for dirt. With their 50mm of travel — more than most! — the Spinner forks offer real damping performance. Plus, their stable geometry ensures these bikes are easy and safe to ride. Even the cranks and saddles are sized specifically for 20” bikes, so you know the fit is as good as the ride. - 50 mm Spinner fork has more travel and better damping for real trail performance - Double-wall alloy rims and Kenda Smallblock 8 tires are light, tough and durable - Youth-sized components deliver on fit and safety
Specifications
- Subtype
- 20-inch
- Category
- Kids
- Component Fork
- Spinner Grind 50 mm
- Component Hubs
- Joytech
- Component Stem
- Promax 60 mm 15°
- Product Family
- Thumper
- Component Chain
- KMC Z51
- Component Color
- Mirror Green
- Component Frame
- Opus 6061 Aluminum
- Component Brakes
- Tektro V-Brake
- Component Pedals
- Wellgo Resin
- Component Saddle
- Opus Junior
- Component Headset
- VP Semi-Integrated
- Component Cassette
- Shimano Tourney 14-34
- Component Crankset
- Samox Alloy 127 mm
- Component Shifters
- SRAM 3.0 Twist 7
- Component Handlebar
- Opus Junior 25.4
- Component Seat Post
- Opus Junior 27.2 x 300
- Component Chainrings
- 36
- Component Front Tire
- Kenda Smallblock Eight 20 x 1.75
- Component Tape Grips
- Opus Kraton
- Component Brake Levers
- Tektro Alloy
- Component Bottom Bracket
- 5 pc Steel
- Component Rear Derailleur
- SRAM X3
- Hubs
- Joytech
- Crankset
- Samox Alloy 127 mm
- Pedals
- Wellgo Resin
- Bottom Bracket
- 5 pc Steel
- Chain
- KMC Z51
- Saddle
- Opus Junior
- Handlebar
- Opus Junior 25.4
- Headset
- VP Semi-Integrated
- Rear Derailleur
- SRAM X3
- Stem
- Promax 60 mm 15°
- Brake Levers
- Tektro Alloy
- Brakes
- Tektro V-Brake
- Cassette
- Shimano Tourney 14-34
- Chainrings
- 36
- Fork
- Spinner Grind 50 mm
- Frame
- Opus 6061 Aluminum
- Seat Post
- Opus Junior 27.2 x 300
- Shifters
- SRAM 3.0 Twist 7
- Tape/Grips
- Opus Kraton
- Color
- Mirror Green
- Front Tire
- Kenda Smallblock Eight 20 x 1.75
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.