[Will Temple]

Hi there,

Could anyone advise the rear derailleur required for a 53/39 double chain ring set up with 9-28 rear cassette (Drive train capacity of 33).

I’m think its a medium GS size ? But wasn’t sure if the unusual teeth sizes made a difference ?

Any guidance would be much appreciated.

[Simon Painter]

Dunno, but I will add, “Thank-goodness I’ve never needed high gears!”

[Will Temple]

LOL ! Thanks for the reply – I’ve answered it – A std derailleur would just about work on the 28 and the medium will be optimal with a long cage ok as well , but overkill.

[Author]

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