FSA Pro Road 39T Chainring Triple
Pro Road 39T Chainring Triple
FSA

FSA Pro Road 39T Chainring Triple

In Stock

Replacement FSA Pro Road 39T inner chainring for 10-speed road triple cranks. CNC-machined aluminum, 130mm BCD, 5-bolt fit (part 370-0239).

Add to Cart
🚚 Fast Shipping 🔒 Secure Checkout ↩ Easy Returns

Product Details

Overview & Technology

FSA's Pro Road 39T inner chainring (part 370-0239) is built for riders running road triple drivetrains who need a precise, lightweight inner ring for smooth climbing gears. Made from CNC-machined aluminum with a durable black finish, this 39-tooth ring uses a standard 130mm 5-bolt BCD to replace worn or damaged inner rings without changing your crankset or chainstay setup. Engineered for 10-speed systems, the tooth profiles are produced to close tolerances to maintain reliable chain capture and consistent engagement with narrow 10-speed chains. The construction balances stiffness for efficient power transfer with low mass to keep climbing performance responsive.

Key Features & Benefits

Durable, lightweight construction: CNC-machined aluminum provides a durable tooth profile that resists wear while keeping rotating weight low. The black anodized finish helps protect the ring and keeps a clean factory look on the crank. • 39 teeth — ideal inner ring for climbing gears on road triples. • 130mm BCD, 5-bolt pattern — direct swap for compatible triple cranks. • Optimized for 10-speed chains — ensures consistent shifting and chain retention.

Fit, Compatibility & Installation

This ring is specified as an inner chainring for road triple cranks with a 130mm bolt circle diameter (BCD) and a 5-bolt mounting pattern. It's made for 10-speed drivetrains and works with standard 10-speed chain widths. Confirm your crank's BCD and bolt count before ordering — the 130mm/5-bolt standard is common on many road triple cranks but not universal. Installation uses standard chainring bolts and requires basic tools: a torque wrench or Allen key for bolt tightening and, depending on your crank, removal of the crank arm. Correct chainline and bolt torque are important for reliable shifting — follow your crank manufacturer's torque specs and use compatible spacer/offset rings if your crank requires them.

Who This Chainring Is For

This FSA Pro Road 39T inner ring is aimed at road riders who run or maintain triple chainsets — particularly touring cyclists, club riders who prefer a lower climbing gear, and mechanics updating worn rings without replacing the entire crankset. It's also a good choice for anyone seeking a lightweight, OEM-compatible replacement from a reputable drivetrain brand. If you ride a double crankset or an 11/12-speed drivetrain, this ring isn't recommended — check compatibility with your specific crank and cassette range before purchase.

Key Features

  • ✓ 39-tooth inner ring optimized for road triple climbing gears
  • ✓ CNC-machined aluminum construction for precise tooth profiles
  • ✓ Standard 130mm bolt circle diameter (BCD), 5-bolt fit
  • ✓ Specifically cut for 10-speed chain engagement and shifting
  • ✓ Black anodized finish resists corrosion and looks OEM-fresh
  • ✓ Lightweight replacement — approx. 0.1 lb (45 g) shipping weight
  • ✓ FSA part number 370-0239 for easy identification and ordering

Specifications

BCD 130
Chainring Bolts 5
Chainring Comp. Road triple
Teeth 39
Material Aluminum
Position Inner
Primary Color Black
Speed 10

Product Identifiers

Vendor Item # 370-0239
UPC 400310008428

Frequently Asked Questions

Will this chainring fit my crankset?

This is an inner chainring designed for 130mm BCD, 5-bolt road triple cranksets. Verify your crank's BCD and bolt pattern before buying. If your crank uses a different BCD or bolt count, this ring will not mount correctly.

Is the FSA Pro Road 39T compatible with 11- or 12-speed chains?

No — this ring is specifically profiled for 10-speed chains and drivetrains. While a 10-speed ring may physically accept an 11-speed chain, shifting and chain retention can be compromised. Use rings matched to your drivetrain speed for best performance.

What tools do I need to install this inner chainring?

You typically need a set of hex keys or a torque wrench for the chainring bolts and possibly a crank removal tool depending on your crank design. Always follow the crank manufacturer's removal and torque specs and use proper chainring bolts for a secure fit.

Can I use this inner ring on a double crankset?

It's engineered for road triples; using it on a double crankset may cause incorrect chainline and poor shifting. Some mechanics may adapt triple rings to doubles with spacers, but it's not recommended unless you understand the implications and confirm fitment.

How long will the aluminum chainring last?

Lifespan depends on riding conditions, maintenance, and chain wear. With a well-maintained drivetrain and timely chain replacements, an aluminum ring like this can last many thousands of miles. Replace worn rings when chain skipping or poor engagement occur to protect your cassette.

Are chainring bolts included with this part?

This listing covers the inner chainring itself (FSA part 370-0239). Chainring bolts are typically sold separately — check your crank or order compatible bolts if you don't already have suitable ones.

Buying Guide

When replacing an inner chainring on a road triple, the two most important specs are BCD (bolt circle diameter) and tooth count. Choose the same BCD and bolt pattern as your crank spider (this ring is 130mm BCD, 5-bolt). Match ring speed rating to your drivetrain — this FSA ring is profiled for 10-speed systems. Consider tooth count based on your intended gearing range: a 39T inner is a common choice for easier climbing while keeping a usable middle gear. Also check for required spacers or offset rings and use proper chainring bolts tightened to the crank maker's torque recommendations to maintain chainline and shifting performance.

Ready to order?

Shop with confidence at Scenders — premium cycling parts, fast shipping.

View Full Product