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Shimano RD 5701 10 speed RD, can it fit a triple crank?

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Shimano RD 5701 10 speed RD, can it fit a triple crank?

Old 02-02-21, 06:03 AM
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Ev0lutionz
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Shimano RD 5701 10 speed RD, can it fit a triple crank?

Just checking, if i'm planning to get a replacement rear mech, 5701, can it fit a triple crank setup? I'm weighing the costs between overhauling(have to send to my LBS) on my current rear mech (RD-5600) vs getting a new one. My current rear mech has rather stiff pivots, though it hasnt really affected my shifting much.

SHIMANO RD 5701 105 30T Max Rear Derailleur, Black, Medium Cage

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Old 02-02-21, 07:39 AM
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The rear der really won't know how many chain rings the bike is using. But it will care about the tooth counts as in how much chain wrap capacity the triple crank needs compared to the double. So you need to add up the numbers to see if you're going to run out of chain wrap ability. WRT the old der's stiff pivots- the upper (the B) pivot is rather easy to take apart to service. It's also the more usual pivot to become sticky over time and exposure. I've done two B pivot clean and greasing in the last few weeks at work. Andy
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Old 02-02-21, 09:02 AM
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Originally Posted by Andrew R Stewart View Post
The rear der really won't know how many chain rings the bike is using. But it will care about the tooth counts as in how much chain wrap capacity the triple crank needs compared to the double. So you need to add up the numbers to see if you're going to run out of chain wrap ability. WRT the old der's stiff pivots- the upper (the B) pivot is rather easy to take apart to service. It's also the more usual pivot to become sticky over time and exposure. I've done two B pivot clean and greasing in the last few weeks at work. Andy
Ah i see! cool, actually i'm currently using a triple crank on my old der. Is it cheap to service at a LBS? Not all LBS can do the pivot service though in my country.
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Old 02-02-21, 09:10 AM
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Cheap to service? Depends of what you call cheap. We'd charge a der install plus a tad more in labor. But no parts costs so less then a new replacement der after install. This is a service many shops won't consider as the trend for a few decades is to not fix/service but to replace components. Less time spent doing the work, more $ going through the cash register (remember those) and a greater likelihood of a better customer outcome.

The pivot service is easiest done with a 5mm hex wrench held in a bench vise, a thin tipped slotted screwdriver and a pair of needle nose pliers. No fancy tools, just a bit hard on your finger tips when reassembling. Andy
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Old 02-02-21, 09:24 AM
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Originally Posted by Ev0lutionz View Post
Is it cheap to service at a LBS? Not all LBS can do the pivot service though in my country.
I always recommend learning to do it yourself. Search for some YouTube videos on how to do it. Here are two I found pretty quick that might help. Repairing Shimano 105 Rear Derailleur With Slipped P-Tension Spring - YouTube

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Old 02-03-21, 01:44 AM
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The full specs are:
RD 5701 GS
Min teeth top gear: 11
Max teeth top gear: 14
Min teeth low gear: 25
Max teeth top gear: 30
Max front difference: 22
Total capacity: 40

So yes, it will be pretty happy with a lot of triple combos. We don't know what chainrings/cogs you have but in general if you have a road triple up front you should be able to mount any cassette on the back, since those normally have a 20T difference. Whereas if you will go for a mountain/trekking triple that has a 22T diff then you will probably have to make some sacrifices on the cassette. Or push the system past its recommended limits, which many people did successfully but I cannot attest to personally.
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Old 02-03-21, 05:20 AM
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Originally Posted by Andrew R Stewart View Post
Cheap to service? Depends of what you call cheap. We'd charge a der install plus a tad more in labor. But no parts costs so less then a new replacement der after install. This is a service many shops won't consider as the trend for a few decades is to not fix/service but to replace components. Less time spent doing the work, more $ going through the cash register (remember those) and a greater likelihood of a better customer outcome.

The pivot service is easiest done with a 5mm hex wrench held in a bench vise, a thin tipped slotted screwdriver and a pair of needle nose pliers. No fancy tools, just a bit hard on your finger tips when reassembling. Andy
From your experience, do rear mechs last very long and does it need replacement if it has not been crashed at all?
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Old 02-03-21, 06:57 AM
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Originally Posted by Ev0lutionz View Post
From your experience, do rear mechs last very long and does it need replacement if it has not been crashed at all?

Ders, ft or rear, can last for decades. Or only a few miles, depending on how they are taken care of or not. If not exposed to impacts or other damaging incidents then only the wear items (pulleys, cables) tend to be needing replacement every so often. Exposure to the elements can hasten a component's demise. So here in the rust belt we see winter use to be really harsh on a moving part. Our salt use and the caking on of slush that then melts into the pivots collectively eats away at the part's smooth and easy action. Massive mileage (as in a daily rider), leaving the bike outside for hours at a time and inability to clean and lube the parts further quicken their wearing out sooner then might be the case.

An analogy is reading about people who come into big money, like winning the lottery. Some handle the new found ability well. Their daily life doesn't change too much and their core values continue to drive them through life in a good way. But then there's those who can't say no to friends and family (some who they never knew they had) and don't have good money sense. After a wild ride they can find themselves far poorer then before. It's not the money's reason or responsibility to last a while. It's how the tool that money is is dealt with that determines much. Andy
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