RaceFace unisex Cinch 30mm Sealed Bottom Bracket — Black, Standard fit for English (BSA) frames, lightweight 87g

Race Face Unisex 30mm Cinch sealed bottom bracket for 68/73mm English (BSA) frames — lightweight, sealed bearings engineered to fit Race Face Cinch 30mm spindles.

This Race Face bottom bracket replacement (model BB19BSA687330) is a threaded English (BSA) unit built to accept 30mm axles and fit frames with 68mm or 73mm shell widths. Designed as a direct accessory for Race Face Cinch crank systems, it pairs sealed bearings with a compact, low-profile cup design to keep drivetrain play minimal and rolling smooth. At just 87 grams, it balances durability and weight savings for riders who want reliable bearing performance without adding unnecessary bulk.

What does this bottom bracket fit and how do I check compatibility?

This unit is made for bikes that use an English threaded (BSA) bottom bracket shell and Race Face Cinch cranks with 30mm spindles. Confirm your frame’s shell width is 68mm or 73mm and that your crank manufacturer specifies a 30mm spindle diameter before purchasing.

• Shell type: English threaded (BSA)
• Shell width compatibility: 68mm and 73mm
• Spindle diameter compatibility: Race Face Cinch 30mm
• Color/finish: black anodized cups for a clean look

How does the sealed bearing design affect maintenance and performance?

Sealed bearings reduce contamination from water, mud, and grit, which helps bearings last longer and stay smooth between service intervals. While sealed units still require periodic inspection, they generally need less frequent repacking and cleaning than open-bearing systems.

• Sealed bearings limit ingress of dirt and moisture
• Lower maintenance compared with open cup designs
• Consistent rolling feel for longer riding blocks
• Easy to replace when wear eventually occurs

How difficult is installation and what tools are required?

Installation is straightforward for anyone familiar with threaded bottom brackets and common bike tools. You’ll need a BSA bottom bracket tool compatible with Race Face cups and a torque wrench to tighten to manufacturer specifications for a secure, creak-free fit.

• Required tool: Race Face/BSA-compatible BB cup tool
• Suggested: torque wrench for correct preload and cup torque
• Basic mechanical skill: moderate (thread cleaning and grease recommended)
• Typical install time: 15–30 minutes for experienced mechanics

What are the physical specs and why do they matter on the trail?

The BB19BSA687330 weighs approximately 87 grams and uses a 30mm spindle interface, offering a balance between stiffness and rotational smoothness. A compact, properly fitted bottom bracket reduces lateral play and improves power transfer, which riders notice when accelerating or climbing.

• Weight: 3.1 ounces (87 g) — keeps rotating mass low
• Axle type: Race Face Cinch 30mm compatibility for stiffness
• Shell type: English threaded for broad frame compatibility
• Finish: black for discreet integration with most frames

Who this is for: This sealed Race Face BSA bottom bracket is aimed at riders using Race Face Cinch cranksets who want a low-maintenance, lightweight replacement for 68mm or 73mm English-threaded frames. It's well suited for cross-country, trail, and all-mountain riders who prioritize reliable bearing performance and straightforward installation. If you run a different spindle diameter, a press-fit shell, or a non-English thread, choose a model matched to those standards instead.