Light quick 20“ bike with a lightweight alloy fork and V-brakes for fun rides in easy terrain. Light wheelset makes the bike easier to move, which helps your little bikers with riding uphill. Thunder 20 is equipped with new MicroSHIFT gear that is easy to control, as well as quality Schwalbe tires with reflective tape for better road safety.
  • Junior Trail Geometry and 100% fun factor design approach
  • Lightweight alloy fork
  • MicroSHIFT 1x7 28 x 12-28
  • Tires Schwalbe CX Comp, 20x1.75" with Reflective tape

  • COLOUR Gloss Dark Red/Black/White, Gloss Neon Cyan/Black/Orange
  • RAHMEN Alloy Al-6061 T6 Custom tubing, Junior Trail Geometry, Shark Spine Semi 20", OLD 130x9, BB BSA 68mm, V-brake pivots, Fender Ready Dropout, Replaceable RD Hanger
  • STEUERSATZ CH290TBW, 1-1/8"
  • GABEL Thunder 20", Alloy Custom Tubing, Ahead 1-1/8", V-Brake, QR Type
  • Rahmen-GRÖßE 10.0"

  • SCHALTUNG 1×7, 28×12-28, 233 %
  • Schalthebel microSHIFT DS45-7R, 7-speed
  • SCHALTWERK microSHIFT RD-M21SS, Super Short cage
  • INNENLAGER Thun Topaz 120mm, BSA, shell 68mm
  • KETTE KMC Z8.3
  • PEDALE Marwi SP-202

  • LENKER ONE1 Alloy, MTB AL-153BT, 10° backsweep, 30mm rise, 560mm, 25.4mm
  • VORBAU ONE1 MAS-M60368 Alloy, 25.4xE35mm, 15°
  • GRIFFE Velo VL-G311
  • BREMSEN Tektro V-brakes
  • SATTEL ONE1 Junior
  • SATTELSTÜTZE ONE1 Alloy, SP C207, 27.2x230mm

  • NABE VR ONE1 KTA55F, 20H, M9x100mm, QR Type
  • NABE HR ONE1 KTAZ2R, 20H, M10x130, CASSETE, QR Type
  • FELGEN Stars J19SD, 20H
  • REIFEN Schwalbe CX Comp, 20x1.75", Reflective tape
  • Speichen Sapim Galvanized Black

  • Gewicht* 8.4 Kg

Das Gewicht wird beim Rahmen der Größe M gemessen. Wir konzentrieren uns auf maximale Zuverlässigkeit der Fahrräder, ein Paar Gramm mehr sind deshalb bei der Marke Rock Machine nicht der Rede wert. Das Gewicht wird bei den Spezifikationen des jeweiligen Modells gemessen.

Rider Size (CM) 10": 110 – 130
Wheels size 10": 20"
REAch (mm) 10": 335
STACK HEIGHT (MM) 10": 409
bb drop (mm) 10": 10
ACHSABSTAND (mm) 10": 870
head tube angle degree 10": 70
seat tube angle degree 10": 73
SEAT Post LENGTH / TRAVEL (mm) 10": 230
Handlebar Width (mm) 10": 560 - R30
VORBAULÄNGE (mm) 10": 35
KURBELLÄNGE (mm) 10": 127

2021 NOTE: Due to the pandemic and difficulties in the delivery chain arising worldwide & extreme demand for our bikes at the same time, we reserve the right to replace some parts with those at the same level of performance (e.g. different brand, the same level of parts) to keep the overall quality of our bicycles. We’re sorry about that. At the end of the day, riding a bike is the best way of #staypositive ever, no matter what brand your handlebar or any other part is!

Manufacturers reserve the right to vary specifiations, including colors, with or without notice at such times in such manner as deemed appropriate. Major as well as minor changes may be involved. Every effort, however, is made to ensure the accuracy of the particulars contained in this presentation. Consult your Dealer for details regarding the specifications of any featured product. This presentation shall not constitute - under any circumstances whatsoever - an offer by the Company to any individual. All sales are made by the Distributor or Dealer subject to and with the benefit of the standard Conditions of Sale and Warranty provided by the Distributor or Dealer, copies of which may be obtained upon request. While efforts are made to ensure specification accuracy cannot always immediately reflect either change in specification or in some isolated cases the provision of a particular feature. Customers are always advised to discuss specific details with the supplying Dealer, especially if a selection is dependent upon one of the features advertised.* The range of the e-bike depends on many factors such as the rider's weight, the track profile, the level of assistance, gear settings, the wind, etc., so the information is indicative and may vary.

Händler in Ihrer Nähe

Kola Pešek a syn I

1034 km away

U Elekrárny 306

53002 Pardubice - Čeperka

Bicicletaria Azores

4455 km away

R. do Espírito Santo

9500-337 Fajã de Baixo

Tel.: +351 913 473 453

Picton Cycles

5673 km away

High St 11-13

L15 8HE Liverpool

Bike Zone - Povoa de Varzim

5681 km away

R. Gomes de Amorim

4490-509 Póvoa de Varzim

Tel.: +351 936 546 431

Folgt unserer Empfehlung und kauft die Fahrräder Rock Machine nur bei unseren autorisierten Vertragspartnern. Bei Fachleuten für die Fahrradauswahl und den nachfolgenden Service.

Consider these

Rock Machine Research&Development

Passion. Mission.

If you want to burn, be on fire! From the first pencil sketch, through prototype testing and debugging to the finished product tested in the most rigorous labs by the engineers and on the trails by our ambassadors and us.

Stamm verfolgen

Wir alle sind Schöpfer. Wir sind die Community, der Stamm, die Familie von Rock Machine.

Folge uns in sozialen Netzwerken und teile deine Erlebnisse mit dem Bike mit dem Hashtag