SRAM DUB British 100mm
SRAM

SRAM DUB British 100mm

$45.00
In Stock

SRAM DUB British 100mm threaded bottom bracket designed for DUB fatbike cranks. Sealed steel bearings and a 28.99mm spindle deliver reliable, contamination-resistant power transfer in 100mm BSA shells.

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Product Details

DUB Technology: Engineered for Durable, Quiet Power Transfer

SRAM's DUB™ platform unifies spindle diameter and bearing placement across the DUB crank family to simplify fitment and improve durability. The DUB British 100mm bottom bracket uses a 28.99mm spindle interface, matched to SRAM fatbike cranks, and a robust external-cup design to spread load and reduce creak. Built for adverse conditions, this unit uses sealed steel cartridge bearings and precision-machined cups to keep grit and moisture out. The result is smoother pedaling feel, longer bearing life, and lower maintenance for winter, snow, and trail-focused fatbike use.

Key Features & Construction Details

This bottom bracket combines a DUB spindle interface (28.99mm) with a British (BSA) 100mm threaded shell. The cups are anodized black for corrosion resistance and accept SRAM DUB fatbike cranks. Bearings are high-quality steel cartridges with sealing optimized for muddy and snowy environments. Real-world benefits:• Improved sealing means fewer service intervals after wet or winter rides. • Steel cartridge bearings balance durability and cost—ideal for heavy loads and colder conditions. • External cup architecture supports better bearing alignment and reduces frame stress compared with press-fit systems.

Fit, Installation & Compatibility

The BB-DUB-BSA-A1 is made specifically for frames with a British (BSA) threaded shell 100mm wide and for all SRAM DUB fatbike cranks. It will not reliably fit non-DUB crank spindles that require different diameters or interfaces. Installation follows standard threaded bottom bracket practice: clean and face the shell if necessary, lightly grease the threads, hand-start the cups, and torque to the manufacturer's spec. Use a compatible bottom bracket tool for threads and follow SRAM's installation guidance to avoid creaks and ensure long bearing life.

Who This Bottom Bracket Is For

This unit is aimed at fatbike riders and mechanics who use SRAM DUB cranksets and need a durable, sealed threaded bottom bracket for 100mm BSA shells. It's an excellent choice for winter riders, snowpack trail shredders, and community bike shops maintaining fleet fatbikes. If you ride a narrower discipline road or a non-DUB crank system, choose a bottom bracket matched to that spindle standard. For anyone running SRAM DUB fatbike cranks, this is the correct, low-maintenance option.

Key Features

  • ✓ Compatible with SRAM DUB fatbike cranks and 100mm BSA threaded shells
  • ✓ DUB spindle interface with precise 28.99mm diameter for accurate fit
  • ✓ Sealed steel cartridge bearings resist water, mud, and cold climates
  • ✓ Black anodized external cups for corrosion resistance and durability
  • ✓ External cup design reduces creak and improves bearing alignment
  • ✓ SRAM model ID BB-DUB-BSA-A1, Manufacturer Part #: 00.6418.015.001
  • ✓ Lightweight unit — shipping weight approximately 0.3 lb and compact

Specifications

BB Shell Thread British
BB Shell Width 100mm
BB Bearing Steel
Crank Spindle Diameter 28.99mm
Interface DUB
Primary Color Black

Product Identifiers

Vendor Item # 00.6418.015.001
UPC 710845813733

Frequently Asked Questions

Is this bottom bracket compatible with non-SRAM cranks?

This bottom bracket is designed specifically for SRAM's DUB spindle (28.99mm). Non-DUB cranks use different spindle diameters or interfaces and may not seat correctly—use a bottom bracket matched to your crank manufacturer's specification.

Will this fit my frame's bottom bracket shell?

It fits frames with a British (BSA) threaded shell that measures 100mm wide. Verify your frame uses a 1.37" x 24 TPI BSA thread and a 100mm shell width before ordering.

Are the bearings serviceable or replaceable?

The unit uses sealed steel cartridge bearings. These are not intended for user servicing; when worn, you replace the bearing assembly or the entire bottom bracket. Sealed cartridges, however, greatly reduce routine service needs.

What tools and prep are required for installation?

Standard threaded bottom bracket tools for external cups are required, plus torque wrench for correct final torque. Clean and lightly grease the threads, hand-start cups, then tighten to SRAM's torque specification for a secure, creak-free fit.

How does DUB differ from older SRAM standards like GXP?

DUB standardizes on a 28.99mm spindle and a unified bearing location across many cranklines to simplify fitment and improve sealing. Older standards like GXP used different spindle diameters and bearing arrangements, so you must match crank and bottom bracket standards.

Is this suitable for winter and salty conditions?

Yes—sealed steel bearings and anodized cups offer improved protection against moisture, grit, and salt. Regular rinsing and periodic inspection will extend life further in aggressive winter riding conditions.

Buying Guide

When choosing a bottom bracket, match three things: crank spindle diameter/interface, frame shell type (threaded vs press-fit), and the shell width. For SRAM DUB crank users, picking a DUB-specific BB removes guesswork—DUB standardizes the spindle-to-bearing interface across many crank models. Decide on bearing material and serviceability based on riding conditions. Sealed steel cartridge bearings like those in this unit are a solid choice for fatbikes and winter riding because they cope well with heavy loads and contamination, offering a balance of durability, cost, and low maintenance.

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