For : Track bike

Teeth option : 47T / 48T / 49T

Teeth thickness : 2.9mm

Chain spec. : 1/2" x 1/8"

BCD : 144, 5 bolts

extra charge for customization (special finish, special cutting)


* standard finish : 3K. 

* fit fixed-gear bike too

* for special BCD, please contact.

Track 47T - 49T

BCD(Shape cutting)

        Note :

    1. Currency : USD

    2. Shipping charge : USD25 for international / USD5 for domestic

    3. Pay method : PayPal / Manual

    4. Pay via PayPal, you can pay with your credit card if you don't have a PayPal account.

    5. For Taiwanese buyer, please choose Manual payment and contact

    6. For buyer in China/Hong Kong/Macao, you can use SF Express(順豐速運) with freight collect. Please place order here and choose Manual payment then contact to get payment account.(You need pay the product online.)


    Didirit Industry Co., Ltd.

    No.10, Ln. 150, Sec. 1, Zhangyuan Rd.,

    Huatan Township, Changhua County 503,

    Taiwan (R.O.C.)

    any comment or question, please  contact via email

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