Problem Solvers Bushnell Eccentric Lightweight Bottom Bracket 68 x 54mm | English Threaded | Aluminum | Silver The Problem Solvers Bushnell Eccentric Lightweight Bottom Bracket is the industry-standard solution for chain tension adjustment on frames with eccentric bottom bracket shells. Designed for single speed, fixed gear, and tandembicycles, this lightweight version features extensive CNC machining and weight-saving cutouts while maintaining the strength and reliability Bushnell eccentric bottom brackets are known for. Compatible with English-threaded (BSA) bottom bracket cups, the Bushnell Eccentric allows riders to fine-tune chain tension without the need for sliding dropouts or chain tensioners. Precise Chain Tension Adjustment The Bushnell Eccentric Bottom Bracket rotates within the frame's eccentric shell, allowing precise chain tension adjustment while maintaining proper crank alignment. Ideal for: Single speed mountain bikes Single speed road bikes Tandems Custom bike builds Fixed gear applications using eccentric BB shells Lightweight CNC-Machined Construction The Lightweight version incorporates additional machining and cutouts to reduce weight while preserving the durability required for demanding riding conditions. Features include: Precision-machined aluminum body Lightweight cut-out design Corrosion-resistant black anodized finish Excellent stiffness and durability English Threaded Compatibility Designed to accept standard English (BSA) threaded bottom bracket cups. Thread Size: 1.37" x 24 TPI Compatible with most English-threaded bottom bracket systems Allows use of your preferred threaded bottom bracket Bottom bracket cups sold separately. Designed for Eccentric Bottom Bracket Frames Fits frames with: 53.8–54.0mm internal diameter eccentric bottom bracket shells 68mm shell width Always verify your frame's bottom bracket shell dimensions before ordering. Specifications Brand: Problem Solvers Model: Bushnell Eccentric Lightweight Bottom Bracket Shell Width: 68mm Shell Internal Diameter: 53.8–54.0mm Bottom Bracket Standard: English/BSA Threaded Thread Size: 1.37" x 24 TPI Material: CNC-Machined Aluminum Finish: Silver MPN: 708752328884 Key Features ✔ Industry-leading eccentric bottom bracket design ✔ Lightweight CNC-machined aluminum construction ✔ Accepts standard English (BSA) threaded bottom brackets ✔ Ideal for single speed and tandem bicycles ✔ Fits 53.8–54mm eccentric bottom bracket shells ✔ Durable silver finish Ideal For ✔ Single speed mountain bikes ✔ Single speed road bikes ✔ Tandem bicycles ✔ Custom bike builds ✔ Eccentric bottom bracket frames ✔ Riders seeking reliable chain tension adjustment Compatibility Notes Fits 68mm wide eccentric bottom bracket shells Fits 53.8–54.0mm inside diameter shells Accepts English/BSA threaded bottom bracket cups (1.37" x 24 TPI) Bottom bracket bearings/cups are not included Why Choose the Problem Solvers Bushnell Eccentric Bottom Bracket? Proven industry-standard eccentric bottom bracket system Lightweight machined design reduces overall weight Reliable chain tension adjustment without sliding dropouts Compatible with standard English-threaded bottom brackets Precision-machined aluminum construction for long-term durability Trusted by custom builders, tandem riders, and single speed enthusiasts The Problem Solvers Bushnell Eccentric Lightweight Bottom Bracket is a premium solution for riders using eccentric bottom bracket frames. With lightweight CNC-machined construction, compatibility with standard English-threaded bottom brackets, and precise chain tension adjustment, it's the ideal upgrade for single speed, tandem, and custom bicycle builds.
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