Technical sheet

Rotor 4B 110 BCD Outer chainring

Name: Rotor 4B 110 BCD Outer chainring
Brand: Rotor
SKU: 139729196
Price: 99.99 EUR
Availability: InStock
Rating: 5 (5 reviews)

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5 Reviews

24 Questions

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Features of Rotor 4B 110 BCD Outer

Product description of Rotor 4B 110 BCD Outer chainring

Description summary

Elevate your road cycling with the ROTOR 4B 110 BCD Outer Chainring. Precision-engineered for peak performance, this high-quality bike part offers flawless, lightning-fast shifting with its advanced steel pins and ramps, allowing you to confidently shift under load. Experience superior stiffness and direct power transfer thanks to state-of-the-art CNC machining, minimizing flex for maximum efficiency. Its optimized, lightweight design enhances agility and climbing prowess. Compatible with 11s and 12s groupsets and select ROTOR and Shimano cranksets, this sleek black chainring is the definitive choice for cyclists demanding reliability and precision

ROTOR 4B 110 BCD Outer Chainring | Precision Engineered for Peak Performance

Elevate your cycling experience with the ROTOR 4B 110 BCD Outer Chainring, a pinnacle of engineering in the world of high-performance bike parts. Designed for discerning cyclists who demand nothing but the best, this chainring is the ultimate upgrade for your road bike drivetrain. The ROTOR 4B 110 BCD Outer chainring in Black/Black is a high-quality bike part designed for optimal performance on your road bike. This chainring features a 110mm bolt circle diameter (BCD) and is compatible with modern ROTOR 4B cranksets. The stealthy black finish adds a sleek and stylish look to your bike, while the durable construction ensures long-lasting performance and reliability. Upgrade your bike with the ROTOR 4B 110 BCD Outer chainring for incredibly smooth and reliable shifting during every ride, from grueling climbs to flat-out sprints.

Key Benefits:

* Flawless Shifting: Experience lightning-fast and accurate gear changes. This outer chainring is engineered with meticulously designed steel shifting pins and ramps. This advanced configuration ensures the chain glides seamlessly between rings, providing you with the confidence to shift under load without hesitation, whether you´re running an 11s or 12s system.
* Superior Stiffness and Power Transfer: Feel every watt of power propel you forward. The chainring´s robust structure is a result of state-of-the-art CNC machining processes. This creates exceptional rigidity, minimizing flex even during the most intense efforts. The result is unparalleled power transfer efficiency, ensuring your energy is converted directly into speed.
* Lightweight Advantage: Gain a competitive edge without sacrificing strength. ROTOR´s commitment to innovation is evident in the chainring´s optimized design, which removes excess material to reduce weight to a minimum. This weight reduction enhances your bike´s agility and climbing prowess, making it a crucial component for performance-oriented Road Cycling.

Technical Specifications:

* Brand: Rotor
* Discipline: Road Cycling
* Bolt Circle Diameter (BCD): 110 mm
* Bolt Pattern: 4-Bolt Asymmetric
* Drivetrain Compatibility: Optimized for 11-speed (11s) and 12-speed (12s) groupsets
* Crankset Compatibility: ROTOR ALDHU, VEGAST, INpower, 2INpower; Shimano® Dura-Ace R9100, Ultegra R8000
* Type: Outer Chainring
* Color: Black/Black

Whether you are a competitive racer, a passionate gran fondo rider, or a cyclist dedicated to optimizing your equipment, the ROTOR 4B 110 BCD Outer Chainring is the definitive choice. It represents a perfect fusion of lightweight design, robust durability, and the exceptional shifting performance that defines the Rotor brand. Install this essential bike part and transform your ride with the reliability and precision you need to conquer the road ahead

Specifications

Manual

Technical specifications of Rotor 4B 110 BCD Outer

Features of Rotor 4B 110 BCD Outer

Color Silver

Color

Silver

Recommended Use Road Cycling

Recommended Use

Road Cycling

Speed 11s

Speed

11s

12s

Direct Mount Rotor

Direct Mount

Rotor

BCD 110 mm

BCD

110 mm

Key differentiators

Technology in Rotor 4B 110 BCD Outer chainring

Energy rating

Warnings

5 / 5

5 Reviews

What our customers are saying about Rotor 4B 110 BCD Outer chainring

Experience superior bike chainring performance and bicycle component quality with Rotor´s 46 Tooth Outer Chainring. Enjoy crisp gear changes and durable rotor rings with this hard-wearing and value-for-money upgrade. Designed for 11-12 speed chains, its cool design complements your bike. This renewed model offers great quality, exceeding previous versions

beautiful product

2026/11/08

DAMIEN

Very beautiful chainring, beautiful finish as always with ROTOR Easy and problem-free installation on a Shimano 105 di2

Corona rotor 52 t

2026/10/21

Claudio

Excellent product at an excellent price, mounted on Shimano Dura Ace it makes a good impression. I also recommend purchasing Rotor end caps for mounting. The website´s stock is varied and competitive

Great Chainring And It Fits Normal 4 Arm - 110BCD Rotor Spider

2026/05/01

- 110BCD Rotor

46 Tooth Out terChainring - will fit the Rotor 4 arm - 110 BCD Spider Bolts through from the outside as normal Great quality as usual from Rotor Can be run on 11 - 12 speed chains - but not sure for a SRAM flat top

full speed

2025/08/31

Andrew

very pleased with rotor rings hard wearing changing gear is crips have changed to this make as it is good value for money look cool to

Good product

2025/04/22

Carlos

Very good quality of dishes and this renewed model is much better than the previous one.

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Include AI Generated questions and answers

2025-01-28

Jade

This product is compatible to Ultegra R8000? Thanks

Answer of Anton

Yes, it’s compatible with 11 speed drive train and Shimano cranks

* Generated by AI based on customer and product data

2025-02-07

Alin

Compatible for ultegra 6800di2 11 v?

Answer of Anton

Yes, the Ultegra 6800 and R8100 chainrings use the same 110mm BCD (Bolt Circle Diameter), but the bolt pattern is different, meaning they are not directly interchangeable. Here’s the key difference: Ultegra 6800 (11-speed) uses a symmetrical 5-arm BCD 110mm design. R8100 (12-speed) uses a 4-arm asymmetric BCD 110mm design (same as R8000 and R9100). This means you cannot mount R8100 chainrings on a 6800 crankset or vice versa.

Answer of Carlos

Compatible with Shimano and SRAM. In your case you only have to take into account that the chain is 11v.

Answer of fabian

Yes compatible

* Generated by AI based on customer and product data

2025-03-22

Kevin

Looking at rotor chainrings for Dura Ace 9200, is there anything else required such as bolts, covers etc or will the existing bolts work?

Answer of Anton

It is not a requirement, it’s gonna work without them.

Answer of Dmitri

Hi, yes you would need a new set of screws to mount these rings to DA 9200 crank arms. Something like these but does not have to be by "rotor" brand, this is just an example. And you need only 4 obviously: https://www.tradeinn.com/bikeinn/en/rotor-road-5-chainring-screw-set/136710249/p Thanks

* Generated by AI based on customer and product data

2025-04-22

Goh

Is compatible with R9200 crank arm ?

Answer of Anton

Yes it is

Answer of Carlos

Yes, the 110bcd measure is the one that rules.

* Generated by AI based on customer and product data

2025-08-31

JERBY

are the bolts included for shimano R7100 crank if I buy this chainring?

Answer of Anton

bolts are not included, but yes it’s compatible with r7100

* Generated by AI based on customer and product data

2026-09-14

Generated by AI and verified

What are the main benefits of the Rotor 4b 110 Bcd Outer Chainring?

Answer of Generated by AI and verified

The main benefits include enhanced power transfer and superior stiffness from its CNC-machined construction, which minimizes flex. It also offers flawless, lightning-fast shifting thanks to advanced steel pins and ramps, providing confidence when shifting under load. Its lightweight design also contributes to better agility and climbing performance.

* Generated by AI based on customer and product data

2026-09-14

Generated by AI and verified

What is the primary discipline this Rotor chainring is designed for?

Answer of Generated by AI and verified

This chainring is specifically designed for road cycling, engineered to provide peak performance for cyclists who demand reliability and precision on the road.

* Generated by AI based on customer and product data

2026-09-14

Generated by AI and verified

What is the bolt circle diameter (BCD) of this chainring?

Answer of Generated by AI and verified

This Rotor outer chainring has a bolt circle diameter (BCD) of 110mm and features a 4-bolt asymmetric pattern.

* Generated by AI based on customer and product data

2026-09-14

Generated by AI and verified

Is the Rotor 4b 110 Bcd Outer Chainring worth the investment for road cyclists?

Answer of Generated by AI and verified

The Rotor 4b 110 Bcd Outer Chainring is designed for cyclists who demand precision and reliability. Its advanced engineering ensures smooth shifting and efficient power transfer, making it a valuable upgrade for serious road cyclists.

* Generated by AI based on customer and product data

2026-09-14

Generated by AI and verified

How many teeth does the Rotor 4b 110 Bcd Outer Chainring have?

Answer of Generated by AI and verified

This outer chainring is equipped with 46 teeth.

* Generated by AI based on customer and product data

2026-09-14

Generated by AI and verified

What material is this chainring made from and how is it manufactured?

Answer of Generated by AI and verified

This chainring is manufactured using state-of-the-art CNC machining to ensure superior stiffness and direct power transfer. The shifting pins are made of steel for durability and fast, accurate gear changes.

* Generated by AI based on customer and product data

2026-09-14

Generated by AI and verified

What color is this chainring?

Answer of Generated by AI and verified

This Rotor chainring comes in a sleek black finish.

* Generated by AI based on customer and product data

2026-09-14

Generated by AI and verified

Is this a direct mount chainring?

Answer of Generated by AI and verified

Yes, this is a direct mount chainring.

* Generated by AI based on customer and product data

2026-09-14

Generated by AI and verified

Can I shift under load with this chainring?

Answer of Generated by AI and verified

Yes, this chainring is engineered with meticulously designed steel shifting pins and ramps. This advanced configuration ensures the chain glides seamlessly, giving you the confidence to shift under load without hesitation.

* Generated by AI based on customer and product data

2026-09-14

Generated by AI and verified

What drivetrain speeds is the Rotor 4b 110 Bcd Outer Chainring compatible with?

Answer of Generated by AI and verified

This chainring is compatible with both 11-speed and 12-speed groupsets, offering versatility for various modern road bike setups.

* Generated by AI based on customer and product data

2026-09-14

Generated by AI and verified

Which cranksets is this Rotor chainring compatible with?

Answer of Generated by AI and verified

This outer chainring is compatible with modern ROTOR 4B cranksets and select Shimano cranksets.

* Generated by AI based on customer and product data

2026-09-14

Generated by AI and verified

Will this chainring fit my crankset if it doesn't have a 110mm BCD?

Answer of Generated by AI and verified

It must be matched with a compatible crankset that has the same BCD and bolt pattern to ensure proper fit and function.

* Generated by AI based on customer and product data

2025-07-24

Jean Marc

Hello, I want to change my current Shimano ULTEGRA 12V 8100 chainring for this one, do I need other screws and can I keep my current small 36 chainring or do I have to change it too? Best regards

Answer of Anton

it's better to change it to size 40 to have best front shifting, but keeping 36 is also an option

* Generated by AI based on customer and product data

2025-08-14

Pierre

I have a Rotor Vegast 50/34.12v crankset. Can I replace the 50 teeth with a 46t?

Answer of Anton

you can if it has the same standard like 4x110

* Generated by AI based on customer and product data

2025-07-10

Pierluigi

Is it compatible with Ultegra 12v? Do I need any spacers to ensure perfect shifting?

Answer of Anton

It is comparable without any spacers

* Generated by AI based on customer and product data

2025-05-19

koshi

Is the 54t outer chainring available here compatible with a 39t or 42t inner chainring?

Answer of Anton

Yes it is compatible

Answer of Carlos

And

* Generated by AI based on customer and product data

2025-09-02

Hironori

Potro 4B 110 BCD outer chainring Ref: (19270247) vs (19270242) I think both item is same item. But reference and price is not same. Is there any difference between Ref: (19270247) vs (19270242)?

Answer of Anton

yes, it’s the same

* Generated by AI based on customer and product data

2025-04-08

Dani

Hello. Is it compatible with the Shimano Ultegra R8100 crankset? Thanks.

Answer of Tomás

Hello, yes it is compatible

Answer of Anton

Yes, it is compatible with Shimano R8100 cranks

* Generated by AI based on customer and product data

2025-11-10

iker

Hi, is it compatible with 12v?

Answer of Anton

yes it is

* Generated by AI based on customer and product data

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Rotor 4B 110 BCD Outer chainring

Features of Rotor 4B 110 BCD Outer

Rotor - Bike parts - Chainrings

Product description of Rotor 4B 110 BCD Outer chainring

Technical specifications of Rotor 4B 110 BCD Outer

Color Silver

Recommended Use Road Cycling

Speed 11s

12s

Direct Mount Rotor

BCD 110 mm

What our customers are saying about Rotor 4B 110 BCD Outer chainring

Use cases

Best for

Benefits

Ideal buyer profiles

Competitive features