SONIX CX4 — Designer — Duratec

SONIX CX4
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The most popular groupsets

Recommended groupset Price incl. tax Weight
RockShox Recon NX Eagle 1x12sp Fulcrum Ritchey Comp 55 209 Kč 11273g
RockShox Recon Sh SLX 1x11sp Fulcrum Ritchey Comp 59 515 Kč 10720g
RockShox Recon GX Eagle 1x12sp Fulcrum Ritchey Comp 62 104 Kč 10445g
RockShox Reba Sh XT 1x11sp Fulcrum Ritchey WCS 74 311 Kč 10068g
RockShox Reba GX Eagle AXS 1x12 Fulcrum Ritchey Comp 85 038 Kč 10273g
RockShox Reba X01 Eagle 1x12sp Mavic Ritchey WCS 87 194 Kč 10040g
RockShox Reba Sh XTR 1x11sp Fulcrum Ritchey WCS 98 157 Kč 9854g
RockShox Reba Sh XT Di2 1x11sp Fulcrum Ritchey WCS 105 961 Kč 10304g
RockShox Reba X01 Eagle AXS Mavic Ritchey WCS 123 311 Kč 10077g
RockShox SID XX1 Eagle 1x12sp Mavic Ritchey WCS 126 238 Kč 9377g
RockShox SID Sh XTR Di2 1x11sp Fulcrum Ritchey WCS 138 479 Kč 9898g
RockShox SID XX1 Eagle AXS Mavic Ritchey WCS 142 137 Kč 9728g

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SONIX CX4

29er 1x12sp

BIKE PRICE
from 55 209 Kč
with groupset
RockShox Recon NX Eagle 1x12sp Fulcrum Ritchey Comp
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SONIX CX4 29er 1x12sp

New - frameset – The Sonix 29", which in technical terms reflects the single cranksets, such as SRAM Eagle - 1x12sp. All cables are completely internally, and it doesn't have a single cable stop weld-on. The technically very clean design consists of the internal running of the Bowden cable to the derailleur and the internal running of the rear brake hose. The cable housing emerges close to the rear hanger.

This frame is a purely racing concept focusing on minimum weight. Double butted 7020T6 alloy tubes are used for the frame construction. Thanks to the large diameter they effectively resist dynamic load during races, and their rigidity gives the competitor immediate acceleration and correct handling of the bike. The effect given by the combination of 29" wheels and a 1x12 gear ratio is improved yet further by the rear axle in a version for fixed axle of 12mm. Thanks to the short & tight rear triangle over a fixed axle, maximum lateral rigidity is ensured even during the most dynamic stages of the race.

The entire concept of the frame in linking with the latest trends in components for cross-country races has set the precedent of this frame to be a racing top model of the brand DURATEC. During the construction of complete bikes we got to a bike weight of around 9.4 kg.

Frame geometry
download the table: male geometry | female geometry 

Custom frame construction: if you have an atypical build, we will happily prepare custom frame geometry on the basis of values measured by the FOG system or we will perform the adjustment according to your requirements.

Standard fittings
fitting bottle cages to the seat and down tube, replaceable hanger for derailleur, seat clamp diameter is 31.8 mm, disc brake is post mount,  1 1/8" - 1 1/2” FSA ORBIT IS2 headset

Extra version
rear dropouts BOOST 148/12 mm, max tyre width 2.4"

Connecting dimensions
geometry of frame adapted to suspension forks 29" with travel of 80-100mm, wheel diameter 29", brake disc diameter 140mm (or with adapter for 160mm), fork steerer 1 1/8" - 1 1/2", diameter of seat post 27.2 mm, BSA bottom bracket (width 68 mm), rear hangers 142/12 mm, max tyre width 2.25"

Benefits

The cable housing for the derailleur and hydraulic hose of the rear brake emerge from the front of the top tube. They continue inside the frame and go to the rear stays. They come out just above the rear dropouts. The conical head tube is for a bearing 1-1/8"- 1-1/2". The larger diameter of the bearing in the lower part of the head ensures optimal distribution of the flexing moment from the braking force at this fixed point. FSA ORBIT IS2 industrial enclosed bearings are part of each frame.

Internal cable routing Sram XX1 Eagle

The SRAM XX1 Eagle set is a hot item from 2017! The incredible range of the gearing is optimised for cross-country races in particular. In technological terms the XX1 Eagle is a highly advanced set combining technical advance and the use of very light materials! Gearing range 500% Smooth running, precise gear change, greater robustness - that's how the experts see the XX1 Eagle.

SRAM XX1 Eagle cranks with possibility of selecting cranksets in a range of 30-32-34-36-38 teeth. Depicted variant of cranks 36 teeth, 175 mm from SRAM Eagle GOLD. The cassette has the greatest possible range of 10-50 teeth in 12 sprockets.

1x12 speed Mounting of rear brake

Rear disc brake post mount system. Diameter of rear disk 140 mm, a 160 mm diameter disk can be used if an adapter is used. Based on our experience, we recommend the use of a rear disk of diameter 140 mm and front disk of 160 mm diameter for racing. The rear wheel is fixed in the frame using the fixed axle Syntace X-12. Syntace X-12 with rear axle greatly increases the rigidity and strength of fixing of the rear wheel. It is far stronger than conventional fixing using a quick-release mechanism.

Rear dropouts Syntace X12 Bottom bracket Press Fit

In the standard version the frame is prepared in terms of construction for the conventional BSA bottom bracket of width 68 mm. In the photograph there is a detail of the 90 mm Press Fit GXP bottom bracket with SRAM XX1 Eagle cranks. The design of the rear triangle construction is for tyres with a maximum width of 2.25".

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