FSA Pro Road 46T Chainring
FSA

FSA Pro Road 46T Chainring

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Lightweight, precision-machined FSA Pro Road 46T outer chainring for 10/11-speed double cranksets. 110mm BCD, 5-bolt aluminum construction delivers crisp shifting and a stiff pedaling platform.

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Product Details

Overview & Technology

FSA's Pro Road 46T is an outer chainring engineered for riders who need a reliable, lightweight upgrade or replacement for 10/11-speed double cranksets. Built as a 5-bolt, 110mm BCD outer ring, it fits the common road double standard and is finished in a durable black that resists corrosion and keeps your bike looking sharp. The ring is made from high-grade aluminum alloy and precision-machined for consistent tooth profile and concentricity. That construction gives you a stiff pedaling platform with minimal added weight (shipping weight listed at 0.25 lb / ~113 g), while tooth profiles and shifting ramps are optimized for the narrow chains used on 10- and 11-speed drivetrains, producing fast, reliable front shifts under load.

Key Features

The Pro Road 46T focuses on the essentials riders expect from a modern road chainring: precise shifting, light weight, and long life. Its outer-ring designation and tooth finish are tailored to work smoothly with front derailleurs on double setups. • 46 teeth: Ideal for high-speed road sections and flatter terrain where a larger top gear matters. • 110mm BCD, 5-bolt: Fits most compact and mid-compact double cranksets that use the 110 BCD standard. • 10/11-speed compatible: Tooth spacing and ramps are profiled for narrow, modern chains. • Aluminum construction & black finish: Lightweight and corrosion-resistant with a clean road aesthetic.

Fit & Compatibility

This outer chainring uses a 110mm bolt circle diameter and 5-bolt pattern — one of the most common standards on road doubles — so it will fit any crankset that specifies a 110 BCD outer ring. It's sold specifically as an outer ring for double cranksets, so it pairs with a matching inner ring sized to your desired gear range. Compatibility notes: it's designed for 10- and 11-speed drivetrains; while it may physically fit on some 9-speed systems, shifting performance is optimized for 10/11-speed chains. Check bolt length and torque specs when installing and replace or reuse chainring bolts only if they are the correct length and in good condition. For best results, match chainring tooth counts and profiles to your crankset manufacturer's recommendations.

Who It's For

The FSA Pro Road 46T is aimed at road cyclists who want a reliable outer ring for faster gearing — club racers, road commuters who need higher top-end speed, and riders replacing a worn or damaged outer ring without changing the entire crankset. Mechanics and home wrenchers appreciate the common 110 BCD fitment and straightforward installation. It’s not intended for single-ring (1x) setups, off-road disciplines, or e-bike systems that require specific chainring designs for motor compatibility. Riders looking for ultralight aero chainrings or exotic materials (carbon) should consider other options; this ring prioritizes durable, cost-effective performance.

Key Features

  • ✓ 46 teeth for higher top-end gearing on flats and descents
  • ✓ 110mm BCD, 5-bolt pattern fits most road double cranksets
  • ✓ Designed for 10- and 11-speed drivetrains for crisp shifting
  • ✓ Precision-machined aluminum construction—light and stiff
  • ✓ Durable black finish resists corrosion and cleans up the cockpit
  • ✓ Sold as outer chainring; matches with compatible inner rings
  • ✓ Light shipping weight (~0.25 lb) minimizes rotational mass

Specifications

BCD 110
Chainring Bolts 5
Chainring Comp. Double
Teeth 46
Material Aluminum
Position Outer
Primary Color Black
Speed 10/11

Product Identifiers

Vendor Item # 371-0246D
UPC 400310067548

Frequently Asked Questions

Will this ring fit my crankset?

The Pro Road 46T uses a 110mm BCD and 5-bolt pattern, so it fits any crankset that accepts a 110 BCD outer chainring. Check your crank manufacturer's BCD specification to confirm compatibility before purchase.

Is this chainring compatible with 9-speed chains?

This ring is profiled for 10- and 11-speed chains. While it may physically fit a 9-speed chain, shifting performance and reliability are optimized for 10/11-speed systems, so we recommend matching the ring to your drivetrain speed.

Can I use this ring as an inner chainring?

No — this unit is sold and profiled as an outer chainring for double cranksets. Inner rings have different tooth shapes and ramps to facilitate shifting and chain retention; swapping an outer for an inner will degrade shifting quality.

Do I need new chainring bolts when installing this ring?

If your current chainring bolts are in good condition and the correct length for a stacked double ring setup, you can reuse them. However, if bolts show wear, corrosion, or are the wrong length, replace them to ensure proper clamping and safety.

How do I know when to replace my chainring?

Replace your chainring if teeth show hooked or shark-fin wear, shifting becomes inconsistent under load, or if the chain skips under power. It's also wise to check chain stretch and cassette wear — pairing a new chainring with a worn cassette or chain can cause rapid wear.

What is the weight of the chainring?

The product lists a shipping weight of approximately 0.25 lb (about 113 g). Actual installed weight may vary slightly depending on finish and production tolerances.

Buying Guide

When choosing a replacement outer chainring for a road double crankset, match the bolt circle diameter (BCD), bolt pattern, and drivetrain speed. A 110mm BCD, 5-bolt ring like the FSA Pro Road 46T fits many modern compact and mid-compact cranksets—confirm your crank's BCD before ordering. Consider tooth count based on your usual terrain and cadence: a 46T is great for higher-speed riding and flatter routes. Also inspect chain and cassette wear; installing a new chainring with a worn chain can accelerate wear and reduce shifting performance. When in doubt, replace chain, cassette, and chainrings as a matched group for the smoothest results.

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