FREESOLO™ -BB-38

The FREESOLO V2 Chain Guide BB-38 by 77designz is a versatile and ultra-light chain guide designed for Cross Country, Enduro, and Downhill applications. This version mounts directly to bikes without chain guide mounting tabs using a bottom bracket clamp. Engineered for ease of use, it features Front Flip Technology, allowing for tool-free chain removal and crank access without disassembling the guide. With a capacity for chainrings from 28 to 38 teeth, the FREESOLO V2 BB-38 combines functionality with innovative design, giving riders the flexibility to tackle varied terrain with confidence.

Features

• Boost Compatible: Chainline adjustable from 48–53 mm, making it compatible with Boost setups.
• Front Flip Technology: Tool-free chain removal and easy crank access for maintenance on the trail.
• Ultra-Lightweight: Weighs just 19.7 grams, making it one of the lightest fully adjustable chain guides available.
• Open Cage Design: Improved mud shedding to keep the chain and guide clean for optimal performance.
• Precision Adjustment: CNC-milled scale for easy chainring size adjustment, with chainline adjustment using spacers.

Specifications

• Mounting Standard: Bottom Bracket (BSA BB, Threaded BB)
• Capacity: Supports round chainrings 28–38T
• Chainline: Adjustable from 48–53 mm (Boost Ready)
• Drivetrain Compatibility: Compatible with 1x10, 1x11, and 1x12 systems (requires clutch derailleur and narrow-wide chainring)
• Materials:
  • Backplate: 7075 T6 Aluminum, anodized black
  • Slider: PA66 GF 10, featuring Front Flip Technology
• Hardware: Torx 25 hollow bolts included
• Weight: 19.7 grams (including mounting hardware)

Scope of Delivery

• 1 x FREESOLO V2 Chain Guide BB-38
• 1 x Chainline Spacer Set
• 1 x 77designz Sticker

Important Compatibility Notes

• Incompatible Chainrings: Not compatible with Bionicon and Garbaruk non-boost chainrings in sizes 30T, 28T, and 26T due to smaller chainline requirements.
• Drivetrain Compatibility: Suitable for 1x10 drives if equipped with a clutch rear derailleur and a narrow-wide chainring.

The FREESOLO V2 BB-38 is perfect for riders who need a flexible, lightweight chain guide that can be mounted on bikes without ISCG tabs, providing solid chain retention and easy maintenance across any riding conditions.