Nutt Hydraulic Brake Disc Upgrade Kit - To fit Revvi 12" and 16" kids bike
 
Please note -  15mm CONE/THIN SPANNER IS REQUIRED TO FIT THIS KIT, You may also need to slightly adjust the rear wheel spacing with washers for the perfect fit/alignment. 
 
A rear Hydraulic disc brake kit designed by Moto Twenty5 Concepts with a Nutt hydraulic brake system to both improve brake power and also ease of use for the rider. 
 
The kit includes:
Nut hydraulic brake system with brake lever. 
140mm disc
brake disc hub mount
brake mount
nuts/bolts/spacers/ties