Wolf Tooth 94 mm BCD for 5-bolt Cranks

Wolf Tooth 94 mm BCD for 5-bolt Cranks Info

The Wolf Tooth 94 mm BCD Chainring for 5-bolt Cranks brings modern chain retention and machining precision to vintage 5-bolt cranksets and Surly OD systems. Whether you're restoring a classic build, upgrading an older mountain bike, or dialing in a plus-size Surly setup, this chainring delivers the benefits of Wolf Tooth’s patented Drop-Stop® profile in a format that keeps older standards alive and performing at their best.

Drop-Stop technology uses alternating wide and narrow teeth to maximize contact on the drive side while clearing mud and debris on the return, resulting in smoother running, improved chain security, and longer component life. Designed with four threaded holes and one through-bolt hole, the chainring offers direct compatibility with Surly OD cranks. It also fits any 94 BCD 5-bolt crankset, though some vintage models may require minor modification.

For riders running Surly OD cranks on fat or plus-size bikes—such as the Instigator or Krampus—stock spacers and longer 16 mm bolts (available from Problem Solvers) are required for correct positioning. The chainring provides an excellent chainline on most Boost setups and is compatible with 9–12 speed drivetrains. Riders using 9-speed systems should pair it with a 10-speed chain for tighter engagement and better retention.

Wolf Tooth 94 mm BCD Chainring Specs

• Compatibility: Fits 94 BCD 5-bolt cranksets; Surly OD compatible; some vintage crankarms may require slight modification.
• Tooth Profile: Drop-Stop® wide/narrow design for secure retention and efficient mud shedding.
• Mounting: Four threaded holes + one through-bolt hole; uses stock 10 mm bolt for hidden arm.
• Surly OD Setup: Requires stock spacers (QBP CR8609) and 16 mm bolts for plus-size applications.
• Drivetrain Compatibility: Works with 9–12 speed; use a 10-speed chain for 9-speed drivetrains.
• Chainline: Designed to offer an optimal chainline on most Boost bikes.
• Weights: 28T – 37 g; 30T – 48 g; 32T – 57 g.
• Material: CNC-machined 7075-T6 aluminum.
• Made in the USA: Manufactured in Minnesota.

Design Benefits

1. Modern performance for classic cranks: Updates vintage and Surly OD 5-bolt systems with top-tier chain retention.
2. Reliable 1x setup: Wide/narrow teeth reduce chain drops in rough or muddy conditions.
3. Flexible compatibility: Works across multiple drivetrain speeds and bike formats.
4. Durable construction: High-strength alloy offers long service life on demanding terrain.

Final Take

This 94 mm BCD chainring is the ideal upgrade for riders wanting to modernize older 5-bolt cranksets or optimize Surly OD builds. With improved chain control, long-lasting materials, and thoughtful compatibility design, it brings renewed performance to platforms that continue to have a loyal following.