rear mech 5700 v 5701

[reacher]

Can anyone tell me what the differance, apart from the ability to take a larger cassette is between these two mechs ?
is the 5701 one a better newer design ?
also what does this mean

• Maximum front difference 16T, total capacity 34T this is on the 5701 spec

cheers

 

[Cycleops]

Probably short/medium cage versions.

 

[IBarrett]

I have both. 5700 on my bike and 5701 as a spare.
I wanted to give myself a lower gear for a hilly sportive coming up so was looking at the differences to see if I could use either.
The only thing I found is the 5701 is compatible with 8, 9, or 10 speed where the 5700 is just 10
There wasn't a discernible difference in the cage lengths.

My bike is at the LBS now while they try to figure out what could be done to give me lower gearing, even if it means compromises because it's just for this one event. They are looking at cassette, derailleur and front chainring alternatives.
I'll know in a couple of days if you're interested.

 

[T.M.H.N.E.T]

28 max for either version of the 5700, short cage 5701 will take 30, med cage 5701 will take 32

 

[Trickedem]

you might get away with 34t on a med cage 5701

 

[IBarrett]

How do you tell if the derailleur you have is a short, med or long cage - I couldn't find any measurements anywhere on the net and the 5700 I have says 30T on one of the cage arms and measures 59mm between wheel centres

It looks like I got my earlier comment backwards and I have the 5700 here on my bench, the 5701 must be on my bike so I can't check for any markings, though the cages were the same length as close as I could tell by holding them together

 

[zigzag]

it does not say on the derailleur itself whether it is short cage (ss) or medium cage (gs), only on the packaging it comes in. you can always look at the images online and compare the length/proportions of your mech vs the image.

 

[SpokeyDokey]

If you clean the thing (if it needs it) you will find the number stamped on what would be the rear of the RD if you was facing the RH side of the bike.

It is VERY tiny.

I found mine when checking capacities and was surprised to find it was 5701 instead of the specified 5700 - was so excited I went and bought a bottle of Bolly and celebrated.

 

[Cycleops]

You'll find the answer on here:
http://cycle.shimano-eu.com

 

[the snail]

.. measures 59mm between wheel centres

Short cage SS I think, my GS measures 85mm between pulley centres

 

[reacher]

cheers guys, both will take the intended cassette i was wondering if one was a better mech than the other was all, its not my bike i'm just altering componants
also, can anyone tell me what headset i need to order to replace this one, cheers

 

[S-Express]

also, can anyone tell me what headset i need to order to replace this one, cheers

What one? A bit more info would be useful.

 

[reacher]

I don't have any more info, I was hoping someone could tell me what type it is

 

[Yellow Saddle]

I don't have any more info, I was hoping someone could tell me what type it is

Broadly speaking, the type is an integrated headset. However, integrated headsets are invisible from the outside so no-one can tell you what sub-type it is unless they happen to have opened it or know that bike very intimately.

Having said that, all that needs replacing on these are the bearings, usually only the bottom bearing. Bearings are a quagmire of standards, whims and sizes. Best to take a sample with you when going to the bike shop. They don't sell these bearings at bearing shops.

 

[reacher]

ok, thats great, what i can do when i swap everything is take it apart at least i know what i'm actually looking to buy, thanks, how do you tell if it actually needs replacing ?
Because i'm upgrading to 10 speed on it i was going to do the cables etc thats why i was thinking it might be a good idea to put a new one in at the same time its not done massive mileage but has gone through about 7 winters