Change rear derailleur?

Swordfishtrombone

Hi
I have just changed my 11-28 cassette to a 11-32. I bought a medium cage derailleur to go with it but thought I'd give it a go first with my existing short cage derailleur (all shimano 105). It actually seems totally fine but thought I should check what the consensus is on this. Anyone else tried this with good or bad results?

vegasfoster

Can try short cage, if doesn't fit your cassette, then 1) can flip the b-screw to the other side to make it longer or 2) use a longer b-screw if you have one or 3) get a Wolf Tooth Roadlink, around $20 usd over here, but not sure how much over there. :-)

sloppyschleckonds

How tight is your chain?

lesfirth

If you have bought a medium cage rear mech. why not fit it?

Swordfishtrombone

Chain is fine.

Although I have the new mech ready to go I'll quite happily send it back and save myself some money if not needed. I also assume the shorter cage gives smoother shifting, otherwise why wouldn't medium cages be standard?

Rode into work today on it, tried out the 32 on a hill, and seemed fine. Shimano say 28 max though. Is there just a big margin of safety?

pblakeney

I have run similar on Campagnolo. They recommend a maximum variation of 16 tooth, 11-29 is 18.
It works fine. The only problem is that I made the chain is long enough for a 2x large combination and got chain slap with a 2x small combination.