Ultegra BR-R8170 Lubricant TA dropout

TA dropout

Bead Folding e-Bike approved No Primary Color Black Tire Type Tubeless Ready Tire Width 2

The wide size range ensures children can use this helmet as they grow from balance bikes to training wheels

All-terrain tread pattern

Magnetic socket drive accepts standard 1/4'' hex bits

Ultegra BR-R8170 Lubricant TA dropoutThe new ULTEGRA BR R8170 hydraulic disc brake caliper has a refined brake caliper design, delivering a quieter brake system. The new brake calipers boast a 10% increase in pad to rotor clearance to reduce noise while a separate bleed port and valve screw improve the bleeding process so that its now possible to bleed the system without removing the caliper from the frame. More fine tuned control and heightened braking performance, thanks to SERVO WAVE