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At Fouriers we admire other manufacturers for their innovations, but sometimes we can’t help to find some flaws and an urgent feeling to improve it. Thus we’ve done the same for the increasing popular 40t/42T sprocket. We’ve noticed a major issue for most 40t/42t sprockets when pedaling backwards the chain easily drops off. The MageSK (aka CR-DX004) is an improved design that doesn’t suffer the same problem and besides, it looks great.

Furthermore we’ve seen that upgrading the cassette to a 40/42T will suffers smooth shifting in the lower gears, due to the removal of the 15T or 17T sprocket. It is therefore recommended to also install a 16T sprocket along with the 40/42T sprocket on the cassette for the smoothest shifting. But we are Fouriers, we don’t want OK performance, we want YEAH performance.

Fouriers MAGE sprockets are the best way to try a single ring setup. Less weight, better chain tention and less friction. They also come in two different sizes including a 40T and 42T. Comes in many different colours aswell. The sprocket can also be mounted onto a cassette. 

Specifics

-  Material: AL7075-T651 

- Weight: 62grams 

- Sizes: 40T/42T

SKU 410629
Brand Fouriers
Shipping Weight 0.2000kg
Shipping Width 0.100m
Shipping Height 0.070m
Shipping Length 0.100m
Shipping Cubic 0.000700000m3

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