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BOLERO Bottom Bracket

BOLERO Bottom Bracket

BOLERO delivers efficient power transfer for racing and mountain bikes. It combines low weight with high stability under load.

Made in Germany, its cold-forged, ZN-coated (A2B) steel spindle, composite sleeve, and composite cups deliver strength without adding weight. The deep-drilled SL (super light) spindle reduces weight without compromising stability. Extra-short spindle options help you fine-tune chainline and fit BOLERO into compact racing frames. Cup configurations offer flexible assembly options, including compatibility with PEDRO’S® key. 


Key Benefits at a Glance

  • Lightweight Construction: The deep-drilled SL spindle and composite components reduce weight while maintaining stability. 
  • Reliable Performance: 2RS ball bearings ensure smooth pedaling and keep dirt and moisture out. 
  • Precise Fit: Extra-short spindle options help you fine-tune chainline in compact racing frames. 
  • Efficient Assembly: BOLERO is compatible with PEDRO’S® tools for easy installation and servicing. 
  • Built for Racing and MTB Applications: BOLERO versions are tested according to ISO 4210-8 for racing bike and mountain bike use, supporting dependable performance under load.
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Technical Specifications

Standards: ISO 4210-8 – Tested for racing bikes (BOLERO-ML SL)
Compatibility: Right-hand (RH) cup or both cups compatible with PEDRO’S® key
Compatibility: Suitable for all square tapered cranksets (ISO 6695:2015)
Construction: 2RS ball bearings (double rubber seals)
Construction: Cold-forged and ZN-coated (A2B) steel spindle
Construction: Composite sleeve for weight reduction
Construction: Composite cups for durability and easy handling
Configuration: Selection of extra-short spindle sizes
Configuration: Deep-drilled SL (super light) spindle (BOLERO-ML SL)
Configuration: Left-hand (LH) cup options: with or without shoulder

FAQ

Yes. BOLERO supports racing bike and mountain bike applications, depending on the version, and is tested according to ISO 4210-8.

BOLERO offers extra-short spindle sizes and LH cups with or without shoulder.

The deep-drilled SL spindle lowers weight without compromising stability. Composite components also help reduce BOLERO’s overall weight.

BOLERO uses extra-short spindle sizes and cup options to suit compact racing frames while allowing precise chainline adjustment.

A ZN-coated steel spindle helps resist corrosion, while sealed components support reliable long-term performance.

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Our B2B Process

We work step by step to clarify what fits your setup before production begins.

1. Tell Us What You Need: Share your technical requirements and expected volumes. Our experts check compatibility with your frame and crankset and confirm the right bottom bracket for your setup.

2. Test Before You Commit: You receive a full offer and technical specification. Sample parts are also available so you can verify fit, assembly, and performance before series production starts.

3. Produce with Confidence: Once approved, we align production and delivery with your schedule. Clear documentation ensures a smooth handover into your assembly process.

Get in touch
Carina Füllbeck

Carina Füllbeck

Vice President Sales
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