Big wheels = big smiles. That is why we decided to offer the benefits of quick 29“ bikes to children and shorter bikers. Thunder 29 HD LTD is the top bike for young riders who want to speed on the trail and uphill. New Junior Trail Advance geometry helps with perfect controllability on singletrack and speed on XC trails. We have chosen easily controllable and lightweight components for the young bikers, so that they could control the bike perfectly. Shimano Deore 1x11 set provides 30x11-51 gear, light suspension fork Suntour with 80 mm travel, and ONE1 carbon seat post offers maximum comfort and control.
  • UPDATED 1st GEN frame with specific Junior Trail Geometry and unique "Big wheels for Big smiles" design approach
  • Rear end MINI BOOST 141 mm
  • NEW SHIMANO DEORE 1x11 30 x 11-51
  • SR Suntour Epixon Air fork (80 mm)
  • SHIMANO disc brakes
  • ONE1 carbon seat post
  • Tires WTB Nano Race, 29x2.10"

  • COLOUR lesklá stříbrná | černá | modrá
  • FRAME Alloy Al-6061 T6 Custom tubing, juniorská trailová geometrie
  • HEAD SET FSA, Flap Top Cap, 1-1/8"
  • FORK vzduchová SR Suntour Epixon9 LOR, QR Type / 80 mm

  • GEARS 1×11, 30×11-51, 464 %
  • SHIFTER Shimano Deore SL-M5100-IR RapidFire Plus, 11 r.
  • REAR DERAILLEUR Shimano Deore RD-M5100 Shadow Plus
  • CRANKSET SR Suntour Zeron X1, 170 mm, 30 zubů
  • CASSETE Shimano CS-M5100-11, 11-51 zubů
  • BOTTOM BRACKET Shimano SM-BB52, BSA, shell 68 × 73 mm
  • PEDALS Marwi SP-160

  • HANDLEBAR One1 Alloy, 9° backsweep, š. 680 mm, ø 31,8 mm
  • STEM One1 Alloy, ø 31,8 mm, d. 45 mm, +3°
  • GRIPS One1, Lock-On
  • BRAKES hydraulické Shimano BL-M4100/BR-MT410, kotouč 160/160 mm
  • SADDLE WTB Volt Sport Junior
  • SEAT POST One1 Race Carbon, ø 30,9 mm, d. 300 mm

  • FRONT HUB Shimano HB-MT200, 28 děr, CL, QR Type
  • REAR HUB Shimano FH-MT200-B, 28 děr, CL, M10 × 141 mm, QR Type
  • RIMS Stars J20S, 28 děr
  • TIRES WTB Nano Race, 29×2,1"
  • SPOKES Sapim Galvanized Black

  • Total WEIGHT* 12,2 kg (velikost XS)

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
999 013.0002.00135-383 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

Kola Pešek a syn I

1034 km away

U Elekrárny 306

53002 Pardubice - Čeperka

Picton Cycles

5673 km away

High St 11-13

L15 8HE Liverpool

Brattørkaia Sykkel AS

6094 km away

Brattørkaia 15AB

7010 Trondheim

VOF Fietsen Opsomer

6155 km away

Hillesteenweg 20

8750 Wingene

Tel.: 0032-51612755

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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