Bb-un300-k Bottom BracketThe Shimano BB UN300 K is a square taper bottom bracket built for riders who want dependable, quiet pedalling at an accessible price. Whether you're navigating Pune's cracked urban roads, grinding up the Western Ghats, or logging steady kilometres through Chennai's coastal humidity, this bottom bracket keeps your crankset spinning smoothly with minimal fuss and long service life. Cobbled Climbs is the authorised retailer for Time in India. Use Cases

a chain breaker

The Shimano CN-HG53 is a 9-speed chain built for everyday reliability

It qualifies for Cobbled Climbs' free delivery on orders above Rs

It provides controlled friction so components stay secure at the torque values specified by your frame or component manufacturer

Riders in Indian cities who need a no-fuss

and electronic groupset tools for installation and diagnostics

Complete your drivetrain upgrade with a quality chain (Shimano Dura-Ace or Ultegra grade)

Measure your top tube and check clearance around your stem and any computer mounts before ordering

and a chain quick-link for full roadside self-sufficiency on longer rides

The SM-SH11's 6° float is the most forgiving

or fast Pune–Mumbai rides

Suitable for frames