Shimano
Shimano Bottom Bracket, Square Taper BSA BB-UN300
Shimano Bottom Bracket, Square Taper BSA BB-UN300
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Shimano square taper bottom bracket BB-UN300, superb value for money for BSA bottom bracket.
This bottom bracket will give you value for money in good senses - durable and trusted for rugged operations from India to the US; bike makers love this for the price and durability. Shimano launched the BB-UN300 square taper bottom bracket as the successor of the BB-UN26 and BB-UN55. It covers various applications, from Touring and City bikes to older Road and Mountain bikes. BB-UN300 is available with BSA thread and in different axle lengths. In this type, the bottom bracket axle and crank are connected by a square taper, and the delivery does not include crank bolts.
BB-UN300
SHIMANO - Square Type Bottom Bracket - MTB - Standard Structure
Square Type Bottom Bracket
- SHIMANO quality/performance cartridge bearing square bottom bracket
- Better chain line stability with chain line stabilizer
- 3 structures available
- Standard, E-type, chaincase options
- Adapter Material: Aluminum
TECHNICAL SPECIFICATIONS
- Application: City, Touring, Road, All Mountain, Cross Country
- Type: BSA
- Shell Width: 68 mm
- Axle Length: 110 mm, 113 mm, 117.5 mm, 122.5 mm
- Axle Type: square taper (JIS)
- E-Type Compatibility: some models (Denoted by "E" in the model name)
- Chaincase Compatibility: some models (Denoted by "K" in the model name)
- Bearings: Steel
- Axle Material: Steel
- Bottom Bracket Cup Material: aluminum (left), aluminum/steel (right)
COMPATIBILITY
- For all cranks with JIS square mount
- FC-M311, FC-M315, FC-M351, FC-M361, FC-M371, FC-M430
- FC-M2000, FC-M3000
- FC-T3010
- FC-MT100
- FC-RS200
- FC-TY301, FC-TY501, FC-TY701
- FC-TX801
- FC-A070, FC-A073
Frequently Asked Questions
Where can I buy a bottom bracket online in India?
Buy SHIMANO and other quality bottom brackets at Ciclo Essentials. We stock threaded (BSA, Italian) and press-fit (PF30, BB86, T47) bottom brackets for all frame standards.
How do I know which bottom bracket my bike uses?
Identify your frame's BB shell standard: BSA/English thread (68/73mm, most common), Italian thread (70mm), PF30 (press-fit, 46mm bore), BB86/92 (press-fit, 41mm bore), T47 (threaded 47mm bore). Check your frame manufacturer's documentation.
What is the price of Shimano Bottom Bracket, Square Taper BSA BB-UN300 in India?
The Shimano Bottom Bracket, Square Taper BSA BB-UN300 is priced at at ₹990 at Ciclo Essentials.
My bottom bracket is creaking — should I replace it?
Creaking from the bottom bracket area is often caused by a dry or worn BB. First try removing it, cleaning the threads/shell, applying anti-seize (threaded) or carbon assembly paste (press-fit), and reinstalling. If the creak persists, replace the BB.
Shipping & Returns
Shipping & Returns
Free shipping on orders above ₹999. Delivered in 3–5 business days pan-India. 30-day hassle-free returns.
Warranty & Authenticity
Warranty & Authenticity
Every product is 100% genuine, sourced directly from the manufacturer. GST invoice included with every order.
Product FAQs
Is this product covered by a manufacturer warranty?
Yes. All products sold by Ciclo Essentials come with the full manufacturer warranty. A GST invoice is included with every order for warranty claims.
Do you offer returns or exchanges?
Yes — 30-day hassle-free returns on all unused, undamaged items in original packaging. Contact us on WhatsApp to initiate a return.
Is this product genuine and not a replica?
Absolutely. Ciclo Essentials sources directly from authorised distributors and brand-owned warehouses. Every product is 100% genuine with a valid GST invoice.
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Shimano Bottom Bracket, Square Taper BSA BB-UN300
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Free shipping above ₹999
Pan-India delivery, 3–5 business days
100% Genuine
Direct from manufacturer
GST Invoice
Valid for business reimbursement
30-day returns
No questions asked