Shimano SLX FH-M675 Rear Hub

DESCRIPTION

Shimano SLX Hub Rear M675 SLX Rear Freehubs are designed for lightweight and durability. The micro ratchet freehub mechanism (XTR - Saint - Dura-Ace) offer super quick engagement for added acceleration. Shimano's proven angular contact cup amp; cone bearing system provides trouble free performance and easy servicing. Features: Set of stiffness and low maintenance hub. Quick release hub set Rear free hub Specifications: support 9/10 speed (FH-M675) cup and cone bearings Center Lock rotor mount system 183; OLD: HB-M675: 100mm, FH -M675: 135mm Buy Shimano SLX Hub Rear M675 from Chain Reaction Cycles, the world's largest online bicycle store.

USER REVIEWS

Showing 1-1 of 1  
[Jun 15, 2015]
tehllama
All Mountain Rider

OVERALL
RATING
1
VALUE
RATING
2
Strength:

Price, Rolls pretty well, Not the worst engagement

Weakness:

Weak freehub body, heavy overall weight, stuck with centerlock brake rotors or an adapter that costs as much as the price difference to a standard hub.

I've exploded my THIRD SLX rear hub in just the last year - pretty much always happens within the first 100 miles, but it's pretty ridiculous trying to ride through rock gardens and washed out turns on what amounts to a fixie - walking the rest of the way is not much fun either.
I realize it's a parts/batch thing, a lot of 2013-2014 vintage SLX hubs have this issue, but it's a fairly simple metallurgical issue that should have simply been recalled - should be possible to NDT these things to see which are affected by that problem, and it's not like the freehub body is particularly expensive, just creates a giant hassle.

I think the underlying problem is a poor tolerance on the freehub body that allows the individual bearings to escape the bearing races and get into the hub ratchet area - this basically locks up the hub, and under much torque it will radially explode the freehub body, which will basically misalign the cassette and set it up extra-wonky.

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