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Nope

The ES71 BB comes in only 113 mm (47.5 mm chainline) and 118 mm (50 mm chainline) axle length with the axle being centered in the BB. This bottom bracket will only work with the FC-M571 crankset.

The FC-M572 crank uses a ES51-K BB in 121 mm (47.5 mm chainline) and 126 mm (50 mm chainline) axle length with the axle being offset to the driveside in the BB. The driveside crank arm has deeper splines so it needs the extra axle length on the driveside.
 

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PizzaMan said:
I have installed a Shimano ES-71 BB.
Would both cranksets fit ?
What is the differance between the 2 ?

Thanks
The 751 and 752 are virtually identical. They were a model year different. The newer, 752, are fatter in the middle and some would argue stiffer, but I can't tell. Your bb will work with either. Just get the chainline right with either the 113 or 118 and you're set.
 

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oops...

I must have been too tired when I did this last night, I gave you info on LX and not XT cranks. 751 and 752 can use the same BB (113 or 118). You can also get a FC-M572-K (K means offset longer axle) which needs the offset axle to the driveside.
 

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'18 Transition Sentinel
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crankarm swappable between FC-M751 & FC-M752 on BB-ES71?

ignazjr said:
The 751 and 752 are virtually identical. They were a model year different. The newer, 752, are fatter in the middle
I'm using XT FC-751 with XT BB-ES71 (no more BB-ES70 out there). Looking at the chart below (Shimano online), somehow only FC-M752 is noted as "Octalink", but my FC-M751 says "Octalink", too.

So, can I use a left crankarm of FC-752 with my FC-751 & BB-ES71, if/when I ever break the left crankarm of my FC-751? (I can't find a left crankarm for FC-M751 out there anymore, but I can still find FC-M752 left crankarms out there.)

By the way, how much fatter is the FC-M752 crankarm in the middle? Is it shaped so that it looks more like a M760-series crankarm, or does it still look more like a M750-series crankarm?

Thanks for the info in advance,
- PiroChu
 

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The only difference between the ES-70 and ES-71 bottom bracket is that the ES-71 has an anti corrosion coating inside the axle (because the M752 crankset uses hollow fixing bolts).

So, yes, you can use a M751 arm on one side and a M752 arm on the other side- it will look real funny since the M752 arms have a much wider profile- about 8-10mm wider.
 
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