This way the footbrake and thumb brake are one, however many do not realise that the rr uses intelli braking in that pulling the front lever gives 80% front brake and 20%rear. Do u want 20% feel coming through that thumb brake ? If u used one before then no u don?t .
Test A) ride up the road and use just ur footbrake , u will feel it bite straight after applying pressure. Now go up road and pull front brake then go to press foot brake. U will find the lever has moved a little and this because pressure is already being applied to the rear brake via front lever