brake bleeding tube size

[alanb2019]

Hi can anyone tell me what size pvc tubing inner size is required to fit over the brake nipple for bleeding the brakes  4mm 5mm 6mm ? thanks

[Fliz]

The tube I use is 5.5mm id.

The bleed nipples are 6mm dia at the widest point of the tapered end. You don’t want the tubing to big or a loose fit at the nipple end because it will make an awful mess when bleeding the brakes. 

[Scotty001]

I use 5 or 5.5mm Di tubing, dip end of tube in boiling water (boil the kettle and pour a little in a mug) to make it soft and suple.

Then slide that end of the tube over the nipple, the tubing will cool down fairly quickly and it's normal ridgiity will return, with a good firm seal and grip on the nipple.

To remove the tube from the nipple just give it a good tug.