The task was clear: build the lightest junior 29“ for good money. And it turned out well. We complemented the lightweight frame with the custom made alloy fork, we even lightened the crankset and brakes and equipped the bike with ONE1 carbon seat post. Shimano Deore 1x11 set provides the gear shifting. The bike geometry was chosen for maximum control off-road, speed on-road, and gravel. Thunder 29 VB is also suitable for shorter adult riders who look for an easy and lightweight 29“ bike.
  • NEW generation frame with specific Junior Trail Geometry and unique "Big wheels for Big smiles" design approach
  • Lightweight alloy fork
  • Rear end MINI BOOST 141 mm
  • NEW SHIMANO DEORE 1x11 30 x 11-51
  • ONE1 carbon seat post
  • Tires WTB Nano Race, 29x2.10"

  • COLOUR Gloss DVO Green/Gloss Silver/Black
  • FRAME Alloy Al-6061 T6 Custom tubing, Junior Trail Geometry, Shark Spine EVO2 29er, BB BSA 73mm, OLD 141x9, V-brake pivots, Fender&Kickstand Ready Dropout, Replaceable RD Hanger, Inner Cable Routing
  • HEAD SET FSA No.10 Semi-Cartrige, 1-1/8“
  • FORK Thunder 29", Alloy Custom Tubing, Ahead 1-1/8", Disc Brake Post Mount, QR Type
  • SIZES 13.5"(XS), 15"(S)

  • GEARS 1x11
  • SHIFTER SHIMANO DEORE SL-M5100 RapidFire Plus, 11-speed
  • CRANKSET SR Suntour Zeron X1 30T
  • PEDALS Marwi SP-400

  • HANDLEBAR ONE1 Sport, MHB AL-6045BT, 9° backsweep, 680mm, 31.8mm
  • STEM ONE1 TDS-C342 Alloy, 31.8xE45mm, +3°
  • GRIPS ONE1 VL-G1661D2N, Lock-On
  • BRAKES SHIMANO BL-T4000/BR-T4000, V-brakes
  • SADDLE WTB Volt Sport Junior
  • SEAT POST ONE1 Race Carbon, SP 406ACF, 30.9x300mm

  • FRONT HUB ONE1 KTA55F, 28H, M9x100mm, QR Type
  • REAR HUB ONE1 KTAH8R, 28H, M10x141, CASSETE, QR Type
  • RIMS Stars J19SD, 28H
  • TIRES WTB Nano Race, 29x2.10"
  • SPOKES Sapim Galvanized Black

  • Total WEIGHT* 11.2 Kg (XS size)

Weight is set for M sized frame unless stated otherwise. We focus on maximum reliability, so cutting some grams down is not our priority! The weight is measured as the each bike specification shows.

Frame Size 13.5" (XS) 15" (S)
WHEELS SIZE 13.5" (XS): 29" 15" (S): 29"
SEAT TUBE LENGTH (mm) 13.5" (XS): 343 15" (S): 381
seat tube angle degree 13.5" (XS): 74 15" (S): 74
EFFECTIVE TOP TUBE LENGTH (mm) 13.5" (XS): 560 15" (S): 575
REAch (mm) 13.5" (XS): 397 15" (S): 412
STACK HEIGHT (MM) 13.5" (XS): 570 15" (S): 570
HEAD TUBE LENGTH (mm) 13.5" (XS): 90 15" (S): 90
head tube angle degree 13.5" (XS): 69 15" (S): 69
CHAINSTAY LENGTH (mm) 13.5" (XS): 440 15" (S): 440
bb drop (mm) 13.5" (XS): 55 15" (S): 55
WHEELBASE (mm) 13.5" (XS): 1078 15" (S): 1093
Handlebar Width (mm) 13.5" (XS): 680 15" (S): 680
Stem Length (mm) 13.5" (XS): 45 15" (S): 45
Crank Length (mm) 13.5" (XS): 170 15" (S): 170
seat post lenght/travel (mm) 13.5" (XS): 300 15" (S): 300
Number BFI Code Description
999 013.0002.00110-244 Rear derailleur hanger

Frame size

We reccomend *

13.5" (XS)
15" (S)

* The recommendation covers most common body types. Always try the bike yourself at the nearest shop!

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.

Nearest shops

Fahrrad Handels Gesellschaft Radschlag mbH

2 km away

Hallgartenstraße 56

60389 Frankfurt am Main

Tel.: +49 69 452064

Fax.: 069 453099

Fahrrad Müller

8 km away

Frankfurter Str. 67

61118 Bad Vilbel

Tel.: +49 6101 85826

Fax.: +49 6101 84064

Radhaus Walldorf

15 km away

Kelsterbacher Straße 69

64546 Mörfelden-Walldorf

Tel.: +49 6105 2768462

Fax.: +49 6105 2768464

H. Göbel Fahrräder und Zubehör

19 km away

Jügesheimer Weg 23

63500 Seligenstadt

Tel.: +49 6182 961797

We strongly recommend buying our products from authorized dealers only.

Professionals who can advise you the best bike fits your riding style and subsequent 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.

See you on the trail!

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