(b) Cyclists do it......

[Maverick Goose]

.....with knobbly rubber

 

[Fnaar]

with purple helmets

 

[dan_bo]

......'till they're buggered.

 

[Carwash]

... in both primary and secondary positions.

... with a special pump.

 

[Landslide]

...via the bottom bracket

 

[TheDoctor]

With a length of chain

 

[Kirstie]

with plenty of lube

ooh matron...!

 

[alecstilleyedye]

with double-walled rims

 

[TheDoctor]

On the road or in the mud

 

[Keith Oates]

when it's very often wet as well!!!!!!!!!!!!!!!!!

 

[alecstilleyedye]

with steel nipples

 

[Landslide]

With large flanges

 

[mondobongo]

with no hands.

 

[Bigtallfatbloke]

slower and better than cars

 

[Fab Foodie]

Surfers do it in the tube...