THUMPER
2018
Archive
Key elements:
- 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
Colors:
Characteristics
Frame
Opus 6061 Aluminum
Fork
Spinner Grind 50 mm
Weight (lb)
23.4 lb / 10.6 kg
Shifters
SRAM 3.0 Twist 7
Front derailleur
N/A
Rear derailleur
SRAM X3
Brakes
Tektro V-Brake
Brakelevers
Tektro Alloy
Crank
Samox Alloy 127 mm
Chainrings
36
Bottom bracket
5 pc Steel
Cassette
Shimano Tourney 14-34
Chain
KMC Z51
Headset
VP Sealed Semi-Integrated
Handlebar
Opus Junior 25.4
Stem
Promax 60 mm 15°
Grips tape
Opus Kraton
Saddle
Opus Junior
Seatpost
Opus Junior 27.2 x 300
Wheels rims
Alex Ace Disc Doublewall
Hubs
Joytech
Tires
Kenda Smallblock Eight 20 x 1.75
Pedals
Wellgo Resin
Geometry
| Size | 20″ |
| Rider’s height (± CM) | |
| Rider’s age | 6-8 |
| S – Seat tube | 305 |
| TT – Top tube | 455 |
| HT – Head tube | 100 |
| HA – Head angle | 71 |
| SA – Seat angle | 74 |
| CS – Chain stay | 390 |
| D – BB drop | 8 |
| ST – Stack | 420 |
| RE – Reach | 334 |
| SO – Stand over | 524 |
| Handlebar width (mm) | 540 |
| Stem length (mm) | 60 |
| Crank length (mm) | 127 |