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18tsrx for SRAM x1 xx1 GX NX ceramic bearing
12 / 18t super large pulley system
Save up to 45% friction resistance, compared with 11T pulley
The ceramic bearing version saves an average of more than 220 watts of power, compared with the original transmission
Movement speed increased by 20% - 26%
Color: Red anode, enamel, blue, gold, green
All carbon fiber cage
Fully 7075 aluminum alloy CNC light pulley
Ceramic bearing version hybrid ceramic bearing version NSK steel bearing version
Weight: 59G
The weight of ceramic bearing plate is less than 1.2g.
This is the only all carbon fiber oversized pulley system of SRAM 1x. On the market, it is reinforced by Toray carbon fiber from Japan and thickened with offset design. It remains in the position of the pulley that perfectly matches the original SRAM pulley, which can ensure the feeling of variable speed.
The RD base is 3D scanned to ensure that the contact parts match perfectly and keep the RD stable.
When the lower lotus tooth pulley and the upper pulley are kept in the exact position as the original pulley of SRAM, you can enjoy low friction resistance stepping without worrying about chain length or box compatibility.
Why replace the folding roller
First of all, using these original pulleys will improve the originally set weak extension and make the guide wheel and gear more sufficient tension between the upper and lower chains.
Second, the contact between the teeth of the chain and 17T or the number of teeth controlled is gear shifting. The more the contact period, the stronger the control power supply.
Third, after redesigning the rotation curve of the cage, the distance between the upper guide wheel and the cog can be improved.
To make a long story short, with all the features mentioned above, you will save more than 2.2 watts per pedal. This is the equivalent of a 10kg bike.