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Shimano Alivio FH-M4050 Complete Freehub Body - Y31H98040

Customer Reviews (2)

4 / 5| Write your review

£32.99

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Details

For use with Shimano Alivio FH-M4050 rear hubs.

This Complete Freehub Body can also be used on the following:

Rear Hubs
- Shimano Alivio FH-T4000

Rear Wheels
- Shimano WH-MT500-CL-R-275
- Shimano WH-MT500-CL-R-29
- Shimano WH-MT15-A-R-275
- Shimano WH-MT15-A-R-29

These are an "A" match which indicates that the parts are the same in materials, appearance, finish & size etc.

Genuine Shimano replacement part.

Product Reviews (2)

Questions & Answers (4) Q & A

Specification

Downloads

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Product Reviews (2)

Overall Product Rating 4 / 5

So,so does the job

By Paul

08 May 2025

3 / 5

ConsRemoving axle to fit.

ProsCheap and cheerful.

Purchased freehub out of curiosity as a new set of cheapo wheels that came with a bike had lateral play on the cassette.
Fitted new purchased freehub, marginal difference in play take up. Freehub unit fine for the price as I’m stuck with Shimano hubs for now.
Ease of fitting, not very, axle has to be removed and Shimano are still using loose bearing in this hub, 10mm hex key required.
I’ll be re-Hubbing rims with Hope hubs next winter.

Good Shimano quality at a reasonable price

By Michael Cooper

03 Apr 2021

5 / 5

I recommend this product

ConsNone

ProsEase of fitting

As expected of Shimano, quality was excellent, the service from SJS., of equal standing.

Questions & Answers (4)

Is this for a 11speed cassette?

By Anton

22 May 2023

Sending to Holland?

SJS Customer Service:

Hello and thank you for your enquiry.
This item will run 8 - 11 speed on MTB and 8 - 10 speed on Road.
Hope this helps.
Kind regards, PC 23/5/23.

Can this be used to replace Y31H98050?

By Glenn

14 Jan 2023

My current freehub body is a Y31H98050, which I use in a FH-M4050 wheel hub, with disk brake and 10spd cassette. What other models would be able to be used with my current set up?
Thanks

SJS Customer Service:

Hi
Thank you for your enquiry. This is the correct freehub for your hub, the difference in part number is that this one includes the fixing bolt & spacer whereas part Y31H98050 is just the part number for the freehub only.
Kind Regards. JP 16/01/23

is this compatible with a FH M405 10 speed disk brake hub and what tools are needed

By Ray Brooks

21 Jul 2019

SJS Customer Service:

Hi,

yes, this is compatible. Tools required would be 10 mm hexagon wrench, 12 mm hexagon wrench and an Adjustable wrench.

Is This Hub Compatable With A Shimano Fh-Rm66 10 Speed Rear Hub

By joe

12 Dec 2016

SJS Customer Service:

Hi,

Although the hub fittings appear the same the bearing cups are different and the seals would not be cross compatible. We do stock the correct freehub body for the FH-RM66 hub though and these are SJSC part number 29220.

Thanks.