SRAM X4
SRAM

SRAM X4

In Stock

Entry-level SRAM X4 rear derailleur designed for 7/8/9-speed MTB drivetrains. Long-cage design handles 11–34T cassettes with a 45T total capacity and works with SRAM 1:1 shifters.

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Product Details

Overview & technology

SRAM X4 is a no-nonsense, trail-ready rear derailleur engineered for reliable shifting on 7/8/9-speed mountain bikes. The X4 uses SRAM's 1:1 actuation ratio, which pairs directly with SRAM 1:1 shifters for predictable indexing and simple setup. Its long-cage construction is tuned for a wide range of cassette sizes, making it a versatile choice for 1x and modest 2x drivetrains. The unit features a robust alloy body and durable hardware designed to resist bending and wear from everyday trail knocks. With a minimum cog of 11T and maximum cog of 34T — plus a total chainwrap capacity of 45T and 22T max front difference — the X4 covers the gear ranges most riders need without adding complexity.

Key features

Designed for practical performance: The X4 balances lightweight materials and rugged construction to deliver consistent, clean shifts under load. The long cage improves chain tension and wrap for larger cassettes and mixed-chainring setups. • 1:1 actuation — Optimized for SRAM 7/8/9-speed shifters. • 7/8/9-speed compatible — Works reliably across three legacy speed standards. • 11–34T range — Min cog 11T, max cog 34T for broad gear choice. • 45T total capacity — Handles common 1x and 2x chainring combinations (front difference up to 22T). • Long cage — Better chain management and reduced chain drop on mixed-gear setups.

Fit, setup & compatibility

The X4 uses a standard derailleur hanger mount and is straightforward to install on most modern aluminium or steel frames with a conventional hanger. It's explicitly built for SRAM 1:1 shifters; mixing with Shimano indexed shifters or non-1:1 systems will result in mismatched indexing and poor shifting. Recommended pairing: 7/8/9-speed SRAM shifters and matching 7/8/9-speed cassette and chain. The long cage allows up to a 45T capacity (for example, a 34T cassette with a 22T difference in the front). Check your chain length and B-tension when installing — use a slightly longer chain for long-cage setups and fine-tune the B-tension screw to clear the largest cog.

Who it's for

The SRAM X4 is ideal for riders upgrading older bikes, building budget-friendly trail rigs, or anyone who needs a rugged, simple derailleur for casual to committed trail use. It’s perfect for commuters, recreational mountain bikers, and riders running 1x or modest 2x drivetrains who don’t require the wide-range modern 11–42 style cassettes. If you ride aggressively on technical enduro or require the latest wide-range 10/11/12-speed drivetrains, consider higher-end SRAM options. For most weekend trail riders and budget builds, the X4 delivers dependable shifting without breaking the bank.

Key Features

  • ✓ SRAM 1:1 actuation for precise indexing with SRAM shifters
  • ✓ Compatible with 7/8/9-speed drivetrains for broad legacy use
  • ✓ Long-cage design fits 11–34T cassettes and larger chain wrap
  • ✓ Total capacity 45T; supports up to 22T front chainring difference
  • ✓ Standard hanger mount for easy swap-in replacement installs
  • ✓ Durable alloy body and robust hardware for trail durability
  • ✓ Lightweight footprint — compact long-cage without excess bulk

Specifications

Max Front Difference 22T
Maximum Cog 34T
Minimum Cog 11T
Primary Color Black
Cage Long
RD Capacity 45T
Speed 7/8/9
Mount Standard

Product Identifiers

Vendor Item # 00.7515.033.000
UPC 710845609671

Frequently Asked Questions

Is the SRAM X4 compatible with Shimano shifters?

No. The X4 uses SRAM's 1:1 actuation ratio and is designed to work with SRAM 7/8/9-speed shifters. Pairing it with Shimano indexed shifters will cause mismatched cable pull and poor indexing.

Can I use the X4 with a 1x or 2x drivetrain?

Yes. The long-cage X4 supports both 1x setups and modest 2x configurations as long as the total chainwrap stays within its 45T capacity and the front difference does not exceed 22T.

What cassette sizes can I run with this derailleur?

The X4 accepts cogs from 11T up to 34T. It's ideal for cassettes that fall within that range—if you need larger wide-range cassettes (40T+), consider a derailleur designed for bigger sprockets.

How do I set chain length for a long-cage derailleur?

Start by wrapping the chain around the largest chainring and largest cassette cog (without routing through the derailleur), then add two full links. Fine-tune after mounting by checking for proper B-tension and smooth shifting across the cassette.

What maintenance does the X4 require?

Routine maintenance includes cleaning the derailleur, keeping the jockey wheels free of grit, lubricating pivots and the chain, and checking hanger alignment. Replace jockey wheels or hardware if you notice excessive play or wear.

Will this derailleur fit my bike's hanger?

The X4 uses a standard derailleur hanger mount and should fit any frame with a conventional replaceable hanger. If your frame uses a direct-mount system, you'll need a compatible adapter or a different derailleur model.

Buying Guide

Choosing a rear derailleur for an MTB build centers on three things: speed compatibility, cage length (capacity), and shifter actuation ratio. Match the derailleur to your shifter type (SRAM 1:1 for the X4) and the number of cassette speeds to ensure indexed shifting. Long-cage derailleurs like the X4 are versatile for larger cassette ranges and mixed chainring setups but require a slightly longer chain and proper B-tension adjustment. Consider riding style and desired gear range when selecting a derailleur. The X4 is a cost-effective, robust option for recreational riders, commuters, and budget builds. Riders who demand ultra-wide ranges, micro-adjust precision, or compatibility with 10+ speed systems should look at higher-tier SRAM derailleurs matched to modern wide-range drivetrains.

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