Shimano Deore BB-MT501 BSA Bottom Bracket

Shimano Deore BB-MT501 BSA Bottom Bracket
92 reviews
Outer Diameter Bottom Bracket Bearing
Select a variant
Colour
Select a variant
15,42

  • Delivery in 2 working days
  • Free tracked shipping over 59,00€
  • Trustpilot rating 4.6/5

Pros & Cons

Pros & Cons

  • This bottom bracket is good value for money.
  • This bottom bracket is well sealed to keep dirt and water out.
  • This bottom bracket's thread is not compatible with press-fit frames.
Read more on what our customers have to say about this product

Specifications

Specifications

Brand Shimano
Bottom bracket width 68 mm / 73 mm
Bottom bracket diameter 33.6-33.9 mm
Outer Diameter Bottom Bracket Bearing 44 mm
What groupset do you have? Shimano Deore
Suitable for bicycle brands BMC / Bianchi / Bulls / Canyon / Cube / Giant / Ridley 2019 onward / Scott / Sensa / Cannondale / Koga / Lapierre / Stevens
Suitable for type of bicycle Mountainbike
Frame material Aluminium
Bottom Bracket Fit External Threaded Bearings
All specifications


Reviews

Reviews

4.6 / 5
Average from 92 reviews
5
29 reviews
4
11 reviews
3
0 reviews
2
1 review
1
0 reviews

Most recent reviews

2 / 5

Poor resistance to weather and water

- Yoram 7 September 2026

My MTB was fitted with this bottom bracket. The first one needed replacing after 3,000 km. So I bought this one again. However, after a 1,000 km ride in Kyrgyzstan, the second bottom bracket has also completely worn out. We had to cross several rivers there, but the bottom bracket on my other MTB is still running smoothly (it has a press-fit bottom bracket, I think an XT version). So if you’re planning longer bike rides or biking in bad weather, I’d recommend looking a bit further. In any case, I’m going for a more expensive – and hopefully better – alternative.

Pros & Cons

Cheap
Durability
Poor water resistance
Automatic translation

5 / 5

A really good product

- Stephan 24 July 2026

Yes, it’s a good replacement for the one that came fitted as standard.

Pros & Cons

Delivered quickly
It’s a good product and fits perfectly.
Very easy to fit yourself.
Can’t find any faults with it yet.
Automatic translation

5 / 5

Good product

- Jetoen 18 June 2026

Easy to assemble. Good quality

Pros & Cons

Fits well
Be careful when screwing it in. The aluminium is quite flimsy.
Automatic translation

4 / 5

Always good service

- Niels 14 May 2026

Good always happy with service.

Pros & Cons

Cheap
Compatible
Fast delivery
Wears out fast
Automatic translation

5 / 5

Great!

- Dennis 5 December 2025

Easy assembly and fits perfectly!

Automatic translation

2

Yoram, 7 September 2026

Poor resistance to weather and water

My MTB was fitted with this bottom bracket. The first one needed replacing after 3,000 km. So I bought this one again. However, after a 1,000 km ride in Kyrgyzstan, the second bottom bracket has also completely worn out. We had to cross several rivers there, but the bottom bracket on my other MTB is still running smoothly (it has a press-fit bottom bracket, I think an XT version). So if you’re planning longer bike rides or biking in bad weather, I’d recommend looking a bit further. In any case, I’m going for a more expensive – and hopefully better – alternative.

  • Cheap
  • Durability
  • Poor water resistance
Automatic translation

5

Stephan, 24 July 2026

A really good product

Yes, it’s a good replacement for the one that came fitted as standard.

  • Delivered quickly
  • It’s a good product and fits perfectly.
  • Very easy to fit yourself.
  • Can’t find any faults with it yet.
Automatic translation

5

Jetoen, 18 June 2026

Good product

Easy to assemble. Good quality

  • Fits well
  • Be careful when screwing it in. The aluminium is quite flimsy.
Automatic translation

4

Niels, 14 May 2026

Always good service

Good always happy with service.

  • Cheap
  • Compatible
  • Fast delivery
  • Wears out fast
Automatic translation

5

Dennis, 5 December 2025

Great!

Easy assembly and fits perfectly!

Automatic translation


Recommended by the product specialist


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92 reviews 154 reviews 32 reviews 8 reviews
Bottom bracket width 68 mm / 73 mm 68 mm / 70 mm 68 mm 68 mm / 73 mm
Bottom bracket diameter 33.6-33.9 mm 33.6-33.9 mm / 34.6-34.9 mm 33.6-33.9 mm 33.6-33.9 mm
Outer Diameter Bottom Bracket Bearing 44 mm 41 mm 44 mm 39 mm
What groupset do you have? Shimano Deore Shimano Ultegra Shimano Tiagra Shimano XTR
Suitable for bicycle brands BMC / Bianchi / Bulls / Canyon / Cube / Giant / Ridley 2019 onward / Scott / Sensa / Cannondale / Koga / Lapierre / Stevens BMC / Bianchi / Bulls / Canyon / Cervelo / Colnago / Cube / Focus / Giant / Ridley 2019 onward / Scott / Sensa / Trek / Wilier / Cannondale / Koga / Lapierre / Pinarello / Specialized / Stevens BMC / Bulls / Canyon / Cervelo / Cube / Focus / Giant / Ridley 2019 onward / Scott / Sensa / Trek / Cannondale / Koga / Lapierre / Specialized / Stevens BMC / Bulls / Canyon / Cube / Focus / Giant / Ridley 2019 onward / Scott / Sensa / Trek / Cannondale / Koga / Stevens
Suitable for type of bicycle Mountainbike Roadbike / gravelbike / cyclocross bike Roadbike / gravelbike / cyclocross bike Mountainbike
15,42 From 18,32 From 17,36 45,40
This product View product View product View product

All specifications

General

Brand
Shimano
Bottom bracket width
68 mm / 73 mm
Bottom bracket diameter
33.6-33.9 mm
Outer Diameter Bottom Bracket Bearing
44 mm
What groupset do you have?
Shimano Deore
Frame material
Aluminium
Bottom Bracket Fit
External Threaded Bearings
Types Screw Thread
BSA
Suitable for
MTB
Crankset axle fit
Shimano Hollowtech II (24 mm)

Compatibility

Suitable for bicycle brands
BMC / Bianchi / Bulls / Canyon / Cube / Giant / Ridley 2019 onward / Scott / Sensa / Cannondale / Koga / Lapierre / Stevens
Suitable for type of bicycle
Mountainbike

All specifications

Brand
Shimano

General

Bottom bracket width
68 mm / 73 mm
Bottom bracket diameter
33.6-33.9 mm
Outer Diameter Bottom Bracket Bearing
44 mm
What groupset do you have?
Shimano Deore
Frame material
Aluminium
Bottom Bracket Fit
External Threaded Bearings
Types Screw Thread
BSA
Suitable for
MTB
Crankset axle fit
Shimano Hollowtech II (24 mm)

Compatibility

Suitable for bicycle brands
BMC / Bianchi / Bulls / Canyon / Cube / Giant / Ridley 2019 onward / Scott / Sensa / Cannondale / Koga / Lapierre / Stevens
Suitable for type of bicycle
Mountainbike