A further furthermore.
The most important parts of any road going vehicle are its brakes.
After setting up new brakes or tweaking used brakes, take the bike out to a quiet hill and test their effectiveness.
Try to stop on the down gradient with ONE brake only, each in turn.
A rider with some experience should quickly feel whether the brakes are capable or not.
Don't listen to anyone who tells you you don't need to brake on the rear brake only. When a misshap befalls the front brake, what else do you have?
In a real emergency, slide your bum off the back of the saddle, put your weigh on the saddle using your belly and use the soles of your shoes on the tarmac as brakes.
It will cost you the price of a pair of shoes, but save your kids the price of a funeral.
Another 'shaggy dog ' story from Jimbo.