Different front and rear wheel

[Taffmonster]

anyone ever do this ?

 

[TOM]

anyone ever do this ?

Most people I know including myself do that all the time

 

[Taffmonster]

are there any conventions as to rim size ? 60mm in front 30 in back etc ?

 

[AlanW]

Assuming you are talking about rim depth:

Usually, deeper at the back. Deeper wheels are more affected by crosswinds and the front wheel steers the bike, so a shallower front wheel can make the bike less twitchy.

AW.

 

[Taffmonster]

Thanks guys