ALUGEAR 2x Aero Chainring for Shimano GRX - Black Groupe Synapse Rim brake 2014-2019 with

Synapse Rim brake 2014-2019 with 25

The HANZŌ time trial bike pushes right up to the limits of UCI design regulations to make it among the fastest UCI-approved TT bikes in the world

Time is saved even once the tubular (glued with Carogna) has been removed

Tire type: Tubeless

AUTO CALIBRATION (NO SPINDOWN NEEDED EVER)

ALUGEAR 2x Aero Chainring for Shimano GRX - Black Groupe Synapse Rim brake 2014-2019 withChainring set 2 speed ROUND AERO for Shimano GRX FC RX820 2 (12 speed), FC RX810 2 (11 speed) Specifications Intended to use: 2X 12 speed and 2X 11 speed for Gravel bike Optimum chainring combinations: 46 32; 48 34 Mounting position: outside 46T; 48T; inside 32T; 34T Bolt circle diameter: 110 mm Shimano Asymmetric (GRX versions outer chainrings), 80 mm Shimano Asymmetric (GRX versions inner chainrings) Attachment: 4 arm spider Material: Aluminum 7075