Finally appeared! It is a model that can be attached to Shimano GRX812/817.
Big pulleys can be used on gravel roads and cyclocross.

(1) Equipped with a CDJ original pulley that uses AURUM+CF30 next-generation resin (super engineering plastic). It has a high strength comparable to that of aluminum but is super lightweight with only about half the weight. Excellent sliding resistance and significantly improved quietness.
(2) A combination of 12T guide pulley and 17T tension pulley realizes further reduction of resistance. There is no problem with shifting performance, so you can use it with confidence.
(3) A new cage design was designed after determining the appropriate position for the larger tension pulley.
④6 colors (matte, clear, red, blue, yellow, green) pulley cage finish allows you to choose the coloring that matches various bikes.



(4) A specially shaped pulley cage that allows mud to flow outside and not inside. Minimize wheel and spoke damage.
⑤ Low sprocket Maximum 42 / Minimum 34
⑥ Capacity expanded from 31 to 40. Front W can be installed.
 
■ Compatible models
SHIMANO GRX 812 / 817 (810 / 815 cannot be installed)
■ Pulley cage color
You can choose from the following 6 colors for the coating of the dry carbon plate. In addition, glossy colors other than matte will be charged 3,300 yen (tax included). Please contact us for custom colors.
(matte, clear, red, blue, yellow, green)

■ Pulley color
The 12T/17T pulley color is a deep green marble color made from AURUM+CF30.
■Bearing option
Hybrid ceramic bearings are standard.
If you want a full ceramic bearing, you can select it for +9,900 yen (tax included).