The tittle says 110 mm long but the image says 123, shall I trust its a 110mm ?

Different lengths may be available depending on the part number chosen. The same image may be used for multiple products of similar type.

Is this equal to a shiman0 un26, 68x127,5mm bottom bracket.

Please watch RJ the bike guy's How To Upgrade Vintage Bike With Sealed Cartridge Bottom Bracket in YouTube

Will this fit a mongoose sycamore 26in mountain bike

when you remove the old one read the dimensions on the bb. you can even take a measuring tape and measure the hole. don't throw away the used one until the new one is found and installed. maybe youtube your bike repair.

How much does this bottom bracket weigh?

Amazon’s specs say .29 Kg. As the package weight. The packaging would not be significant.

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SHIMANO UN300 English Bottom Bracket

Product ID: 281705119

Details

Bearing number
EBBUN300B22X
Brand
SHIMANO
Item dimensions L x W x H
14.3 x 5.2 x
Item weight
300 Grams
Material
Metal

🔩Aluminum adapter for lightweight durability

⚙️Precision cartridge bearing

🚴‍♂️Enhanced chainline stability

EC$161

Duties & taxes included

In stock

Sold byAmazon Saint Vincent and the GrenadinesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Ride smoother, ride smarter — upgrade your drivetrain game!

VERSATILE FIT OPTIONS - Available in Standard, E-type, and chain case variants to suit your specific bike setup.
LIGHTWEIGHT YET DURABLE - Aluminum adapter material balances strength with minimal added weight for peak efficiency.
TRUSTED SHIMANO QUALITY - Backed by a 4.6-star rating and proven durability, this bottom bracket is a must-have upgrade.
OPTIMIZED CHAINLINE STABILITY - Chain line stabilizer reduces drivetrain wear and maximizes power transfer.
ENGINEERED FOR SMOOTH PERFORMANCE - Shimano’s cartridge bearing ensures ultra-reliable, low-friction pedaling every ride.

The SHIMANO UN300 English Bottom Bracket features a high-quality cartridge bearing and aluminum adapter for lightweight durability. Designed to improve chainline stability with a built-in stabilizer, it comes in three structural options to fit various bike setups. Trusted by cyclists worldwide, it offers reliable performance and a smooth pedaling experience.

Specifications

ASIN	B08C786DW8
Bearing Number	EBBUN300B22X
Bearing Type	Cartridge Bearing
Best Sellers Rank	#48,007 in Sporting Goods ( See Top 100 in Sporting Goods ) #12 in Bike Bottom Brackets
Brand Name	SHIMANO
Compatible Lubricant	Grease
Customer Reviews	4.6 4.6 out of 5 stars (1,251)
Included Components	Bottom Brackets
Item Dimensions	14.3 x 5.2 x 4.9 centimeters
Item Type Name	Mid Movement
Item Weight	300 Grams
Manufacturer	SHIMANO
Material Type	Metal
Model	EBBUN300B22X m
Number of Items	1
Part Number	EBBUN300B22X
Set Name	EBBUN300B22X
Specification Met	Herstellerstandards
UPC	192790619156
Unit Count	1 Count

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EC$161

Duties & taxes included

In stock

Sold byAmazon Saint Vincent and the GrenadinesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Saint Vincent and the Grenadines.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Imran F.

Very reliable shop with genuine products. Will definitely buy again!

2 weeks ago

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