Shimano 6 speed drivetrain set up with the shimano tourney rear derailleur and the matching revo shifter these should allow a smooth light action gear change to help kids understand the use of gears mini v brakes to ensure that the your child can stop with ease raleigh have bolted on a set of mini v brakes to give a solid braking performance along with these they have got short pull levers making it that little bit easier for the children to reach the levers built tested and tuned each bik