Choosing the right chain ring can improve shifting, reduce drivetrain weight, and increase chain retention on rugged trails. A 104 BCD pattern is common on many mountain bikes, making it easy to swap rings without changing bolts. Narrow-wide teeth help keep the chain engaged on rough terrain, while aluminum construction keeps weight down. Below are five well-regarded 104 BCD options and guards that fit common cranksets, cover a range of tooth counts, and suit single-speed or 1x setups. The table below highlights essentials for quick comparison.
| Product | Brand | Key Feature |
|---|---|---|
| Boao 32T 104 BCD Chainring | Boao | Lightweight 104 BCD, Narrow Wide, 32T |
| MSRECK Oval 38T Narrow Wide Chainring | MSRECK | 104 BCD, 32-38T, Oval, single-speed suitable |
| MSRECK Round Oval 32T Chainring | MSRECK | 104 BCD, 32T, Round/Oval options, single-speed |
| GANOPPER 104BCD Bash Guard | GANOPPER | 104 BCD, 30-34T protection guard |
| Funn Zippa Lite Bash Guard | Funn | ISCG05 mount, 26-32T protection for 1x setups |
Note: All listed items support standard 104 BCD cranksets, with a mix of oval and round ring designs and protective bash guards to shield the chainring from trail impacts.
Boao 32T 104 BCD Chainring
Boao’s 32T chainring is designed for XC off-road, AM, and DH bikes with steep slopes. It uses a 104 BCD pattern for broad crank compatibility and a lightweight yet sturdy T6 aluminum construction, which can help reduce overall drivetrain weight. Positive and negative teeth help prevent the chain from dropping, and the narrow-wide design improves chain retention on rough terrain. The surface is easy to clean, making maintenance simple after muddy rides. This ring is straightforward to install on compatible cranks and is ideal for riders seeking a balance of reliability and weight savings.
- 104 BCD, 32T for XC/AM/DH bikes
- T6 aluminum construction; lightweight yet durable
- Narrow-wide teeth for improved chain retention
- Easy-to-clean surface; straightforward installation
MSRECK Oval 38T Narrow Wide Chainring
MSRECK’s oval chainring provides a broader 104 BCD platform with multiple sizes, including 38T. The oval shape aims to smooth power transfer and optimize cadence on uneven terrain. Features include a narrow-wide tooth design for enhanced chain retention and reduced noise, with a thickness around 4 mm. It is designed for single-speed chains, not compatible with double or triple chainrings. Installation is straightforward on compatible cranks, and the oval profile can help balance power delivery across rough sections of a ride.
- 104 BCD with 32-38T range
- Narrow-wide teeth for retention and quieter operation
- Oval shape for smoother power transfer
- Single-speed compatibility only
MSRECK Round Oval 32T Chainring
This MSRECK product offers a range of 104 BCD single-speed chainrings in both round and oval shapes, including a 32T option. The ring is 4 mm thick, with a narrow-to-wide tooth design intended to improve chain retention and reduce friction and noise. It’s explicitly stated for single-speed use and may not be suitable for multi-gear setups. Easy installation and robust construction are key highlights, making it a versatile choice for riders prioritizing simplicity and reliability on trail rides.
- 104 BCD, 32T option available
- Round/Oval formats; 4 mm thick
- Narrow-wide teeth to enhance retention
- Single-speed dedicated; straightforward installation
GANOPPER 104BCD Bash Guard
GANOPPER’s bash guard is a lightweight aluminum guard designed to shield 104 BCD chainrings during off-road riding. Made from CNC-machined AL 6061/T6, it combines strength with low weight (around 59.2 g). The guard diameter is about 150 mm, and the kit includes longer M8 crank bolts with spacers, facilitating mounting. It’s intended for All Mountain and aggressive XC use, helping protect the chainring from impacts and wear while maintaining a slim, unobtrusive profile on the drivetrain.
- CNC AL 6061/T6 construction; lightweight
- 104 BCD compatibility; fits 30-34T rings
- 150 mm diameter; includes spacers and bolts
- Strong protection for tough trail riding
Funn Zippa Lite Bash Guard
The Funn Zippa Lite guard is designed to fit ISCG05-mount frames and provides protection for 26T to 32T single chainrings. It uses a CNC-machined AL7075 backplate paired with a durable, lightweight thermoplastic bumper that can be easily replaced if damaged. This guard is well-suited for riders running 1x setups who want reliable protection without adding significant weight or complexity to the drivetrain.
- ISCG05 mount compatibility
- Fits 26T–32T single chainrings
- CNC AL7075 backplate; replaceable bumper
- Lightweight, robust protection for rugged trails
Buying Guide
Compatibility And Sizing
Start by confirming crank compatibility: most mountain bikes use 104 BCD chainrings, but some cranks vary. Confirm the number of teeth you want (commonly 32T-38T for 1x setups) and ensure the ring’s thickness and mounting pattern align with your crank spider. Oval rings can alter cadence and power delivery; decide if you want a traditional round ring or a narrow-wide oval design for improved chain retention on rough terrain.
Ring Type And Tooth Design
Round rings deliver predictable gearing, while oval rings aim to optimize power transfer by varying effective gear ratio through the pedal stroke. Narrow-wide teeth are a key feature for chain retention, especially on drops and rocky sections. For riders who ride aggressively, narrow-wide designs can reduce dropped chains and friction, but they may require a period of adjustment to cadence and shifting feel.
Materials And Weight
Most 104 BCD rings use aluminum alloys (commonly 6061/T6) to balance light weight and durability. Thicker profiles (around 3.7–4.0 mm) can improve durability but add slight weight. Lighter rings benefit sprinting and climbing, while sturdier constructions endure harder impacts on rough trails. Surface finish and ease of cleaning also affect how quickly you can maintain the ring after muddy rides.
Mounting And Protection
IsCG05 guards are optional but useful on aggressive terrains. Some guards integrate directly with the crank or use spacers to adjust clearance. When selecting a guard, verify compatibility with your chainring size (often 30–34T or 26–32T) and ensure it does not interfere with chain clearance or derailleur lines on your bike’s front end.
Maintenance And Longevity
Regular cleaning and inspection help extend ring life. Narrow-wide teeth may wear at different rates depending on chain and riding style. Inspect for worn teeth, cracks, or bending after heavy rides. Lubrication and timely replacement of worn rings prevent downstream drivetrain wear and ensure smooth shifting over time.
For riders prioritizing a balance of light weight, durability, and protection, pairing a 104 BCD chainring like a 32T with a guard such as the GANOPPER or Funn Zippa Lite provides reliable performance on varied terrain. Oval designs can offer cadence advantages on lengthy climbs, while round rings remain a dependable choice for consistent shifts. Evaluate your terrain, preferred gearing, and mounting compatibility to choose the best setup for your mountain bike.